Small craft - Remote mechanical steering systems (ISO 8848:2020)

Kleine Wasserfahrzeuge - Steueranlagen (ISO 8848:2020)

Dieses Dokument legt Anforderungen an Entwurf, Konstruktion, Montage und Prüfung von mechanischen Kabelsteueranlagen sowie die Kupplungsstelle des Endbeschlages des Steuerkabels zu Rudern, Strahlantrieben, Außenbordmotoren und Z Antriebsmotoren für kleine Wasserfahrzeuge fest.
Es ist anwendbar für drei unterschiedliche Klassen von Steueranlagen für den Einsatz auf diversen Wasserfahrzeugtypen:
   Steueranlagen in Standardausführung für kleine Wasserfahrzeuge mit Einzel- und Doppel-Außenbordmotoren mit einer Gesamtleistung von mehr als 15 kW sowie mit Rudern, Z Antrieben und Wasserstrahlantrieben;
   Steueranlagen in leichter Ausführung für kleine Wasserfahrzeuge mit einem Außenbordmotor mit einer Leistung von 15 kW bis 40 kW;
   Mini-Jet-Steueranlagen mit Ausnahme von Wasserskootern.
ANMERKUNG   Steueranlagen in Standard- und leichter Ausführung sind mechanisch austauschbar. Eine Steueranlage in Standardausführung kann auch in einem Wasserfahrzeug verwendet werden, das für eine Steueranlage in leichter Ausführung entworfen wurde. Eine Steueranlage in leichter Ausführung kann jedoch nicht in einem Wasserfahrzeug verwendet werden, das eine Steueranlage in Standardausführung erfordert. Mini-Jet-Steueranlagen unterscheiden sich mechanisch von den zuvor genannten Anlagen und können nur in Mini-Jet-Wasserfahrzeugen nach diesem Dokument verwendet werden.
Dieses Dokument befasst sich nicht mit Vorrichtungen zum Steuern des Wasserfahrzeugs im Notfall.

Petits navires - Appareils à gouverner commandés à distance (ISO 8848:2020)

Mala plovila - Daljinski mehanski sistemi krmiljenja (ISO 8848:2020)

General Information

Status
Published
Public Enquiry End Date
19-Sep-2019
Publication Date
28-Apr-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
15-Apr-2021
Due Date
20-Jun-2021
Completion Date
29-Apr-2021

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SLOVENSKI STANDARD
SIST EN ISO 8848:2021
01-junij-2021
Nadomešča:
SIST EN ISO 15652:2017
SIST EN ISO 8848:2017
SIST EN ISO 9775:2017
Mala plovila - Daljinski mehanski sistemi krmiljenja (ISO 8848:2020)
Small craft - Remote mechanical steering systems (ISO 8848:2020)
Kleine Wasserfahrzeuge - Steueranlagen (ISO 8848:2020)
Petits navires - Appareils à gouverner commandés à distance (ISO 8848:2020)
Ta slovenski standard je istoveten z: EN ISO 8848:2021
ICS:
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
47.080 Čolni Small craft
SIST EN ISO 8848:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 8848:2021
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SIST EN ISO 8848:2021
EN ISO 8848
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2021
EUROPÄISCHE NORM
ICS 47.080 Supersedes EN ISO 15652:2017, EN ISO 8848:2017,
EN ISO 9775:2017
English Version
Small craft - Remote mechanical steering systems (ISO
8848:2020)

Petits navires - Appareils à gouverner commandés à Kleine Wasserfahrzeuge - Steueranlagen (ISO

distance (ISO 8848:2020) 8848:2020)
This European Standard was approved by CEN on 30 July 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8848:2021 E

worldwide for CEN national Members.
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SIST EN ISO 8848:2021
EN ISO 8848:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2013/53/EU aimed to be covered ........................................................ 4

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SIST EN ISO 8848:2021
EN ISO 8848:2021 (E)
European foreword

This document (EN ISO 8848:2021) has been prepared by Technical Committee ISO/TC 188 "Small

craft" in collaboration with CCMC.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by October 2021, and conflicting national standards shall

be withdrawn at the latest by October 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 15652:2017, EN ISO 8848:2017 and EN ISO 9775:2017.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive(s) see informative Annex ZA, which is an integral part of this

document.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 8848:2020 has been approved by CEN as EN ISO 8848:2021 without any modification.

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SIST EN ISO 8848:2021
EN ISO 8848:2021 (E)
Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of Directive 2013/53/EU aimed to be covered

This European Standard has been prepared under a Commission’s standardization request M/542/C

(2015) 8736 final to provide one voluntary means of conforming to essential requirements of Directive

2013/53/EU.

Once this standard is cited in the Official Journal of the European Union under that Directive,

compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of

the scope of this standard, a presumption of conformity with the corresponding essential requirements

of that Directive, and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and
Directive 2013/53/EU
Essential Requirements of Clause(s)/sub-clause(s) Remarks/Notes
Directive 2013/53/EU of this EN
Annex I.A.5.4.1 – Steering system, Clauses 1-8 The scope of this standard
General addresses remote mechanical
cable steering systems only. It
does not address the
requirements for steering
wheels, hydraulic steering
systems and electrical/electronic
steering control systems which
are covered elsewhere.
This Standard does not address
propulsion control systems or
emergency steering
arrangements.
Annex I.A.2.5 – Owner’s Manual Clause 9.2
Annex II, Components of Clauses 1 - 8 In respect of push-pull cable
watercraft (3) -Steering wheels, steering systems and their major
steering mechanisms and cable component items only.
assemblies.
Steering Wheels supplied as
components are not covered by
this Standard.

WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European

Standard is maintained in the list published in the Official Journal of the European Union. Users of this

standard should consult frequently the latest list published in the Official Journal of the European

Union.

WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of

this standard.
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SIST EN ISO 8848:2021
INTERNATIONAL ISO
STANDARD 8848
Second edition
2020-12
Small craft — Remote mechanical
steering systems
Petits navires — Appareils à gouverner commandés à distance
Reference number
ISO 8848:2020(E)
ISO 2020
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SIST EN ISO 8848:2021
ISO 8848:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
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SIST EN ISO 8848:2021
ISO 8848:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Constructional requirements .................................................................................................................................................................. 3

5 Outboard engine and inboard-sterndrive design requirements ........................................................................ 6

6 Steering system requirements ............................................................................................................................................................... 8

6.1 Craft-mounted steering systems .............................................................................................................................................. 8

6.2 Steering systems .................................................................................................................................................................................... 8

6.3 Steering cables ........................................................................................................................................................................................ 8

6.4 Steering mechanisms......................................................................................................................................................................... 9

7 Installation ..............................................................................................................................................................................................................11

8 Test requirements ............................................................................................................................................................................................15

8.1 General ........................................................................................................................................................................................................15

8.2 As-installed tests ................................................................................................................................................................................15

8.3 Components test .................................................................................................................................................................................16

8.3.1 Steering cable and output assembly tests ...............................................................................................16

8.3.2 Steering mechanism assembly tests ............................................................................................................17

9 Markings, owner’s manual and installation manual ...................................................................................................20

9.1 Markings ....................................................................................................................................................................................................20

9.2 Owner’s manual ..................................................................................................................................................................................20

9.3 Installation manual ..........................................................................................................................................................................20

Bibliography .............................................................................................................................................................................................................................21

© ISO 2020 – All rights reserved iii
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SIST EN ISO 8848:2021
ISO 8848:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be Noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to

the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see

www .iso .org/ iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 188, Small craft, in collaboration with

the European Committee for Standardization (CEN) Technical Committee CEN/TC 464, Small craft, in

accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

This second edition of ISO 8848, together with ISO 23411:2020, cancels and replaces ISO 8848:1990,

ISO 9775:1990 and ISO 15652:2003, which have been technically revised.
The main changes compared to the previous edition are as follows:

— ISO 8848:1990, ISO 9775:1990 and ISO 15652:2003 have been consolidated into this document;

— added "mechanical" in the title;
— updated definitions;
— updated requirements to meet current industry practices;
— added 7.7 regarding control lever to steering wheel clearance;
— steering wheel requirements and tests have been removed.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
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SIST EN ISO 8848:2021
INTERNATIONAL STANDARD ISO 8848:2020(E)
Small craft — Remote mechanical steering systems
1 Scope

This document specifies design, construction, installation and test requirements for remote mechanical

cable steering systems and the output ram interface point to rudders, jet drives, outboard and

sterndrive engines for small craft.

It is applicable to three distinct classes of steering systems for use on various types of craft:

— standard duty steering systems, for small craft with single and twin installations of outboard

engines with a total over 15 kW power, and with rudders, sterndrives, and water-jet drives;

— light duty steering systems, for small craft with a single outboard engine of 15 kW to 40 kW power;

— mini-jet steering systems, excluding personal watercraft.

NOTE Standard and light duty steering systems are mechanically interchangeable. A standard duty steering

system can be used on a craft designed for a light duty system. However, a light duty steering system cannot

be used on a craft that requires a standard duty steering system. Mini-jet steering systems are mechanically

differentiated from the previously mentioned systems and can only be used on mini-jet craft as defined in this

document.
This document does not address emergency means for steering the craft.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 10240:2019, Small craft — Owner's manual

ISO 12217-1:2015, Small craft — Stability and buoyancy assessment and categorization — Part 1: Non-

sailing boats of hull length greater than or equal to 6 m

ISO 12217-2:2015, Small craft — Stability and buoyancy assessment and categorization — Part 2: Sailing

boats of hull length greater than or equal to 6 m

ISO 12217-3:2015, Small craft — Stability and buoyancy assessment and categorization — Part 3: Boats of

hull length less than 6 m
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
craft-mounted steering system

assembly including all components necessary to transmit remote manual effort to the end of the output

ram (3.20) and a means to secure an output ram guide tube to the craft
© ISO 2020 – All rights reserved 1
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SIST EN ISO 8848:2021
ISO 8848:2020(E)
3.2
interface point

point of mechanical interface in the steering system (3.11) where a connection is made between the

output ram (3.20) and the craft components that are not supplied as part of the same assembly

3.3
control element

device connected to the steering mechanism (3.6) that allows the operator to apply manual steering

effort to the steering system (3.11)
EXAMPLE Steering wheel (3.13), handlebar (3.5), joystick (3.7).
3.4
drag link

device in an engine-mounted steering system (3.10) by which the linear force of the output ram (3.20) is

transmitted to the engine steering arm
3.5
handlebar

mechanical means for applying a manual steering effort to the steering mechanism (3.6) in a horizontal

configuration, with hand grips at each end and the helm connected at the middle
3.6
steering mechanism

device, to which a control element (3.3) is attached for manual application of a controlling force, and by

which the controlling force is fed into a steering system (3.11)
3.7
joystick

operator input device for the simultaneous control of thrust, steering and propulsion

3.8
mini-jet craft

craft weighing less than 1 000 kg, with an inboard engine powering a water-jet pump as its primary

method of propulsion, designed to be operated with one or more persons within the confines of a hull

3.9
minimum retained system performance

system performance after test(s), such that at least 90 % of the steering arc normally available each

side of the mid-position can be obtained by exertion of no more than 27 N∙m of torque at the steering

mechanism (3.6), through the control element (3.3)

Note 1 to entry: This criterion does not define the steering system (3.11) performance while a craft is underway,

but is rather intended to provide quantitative limits for design and test purposes.

3.10
engine-mounted steering system

assembly including all components necessary to transmit a remote manual effort to the end of the

output ram (3.20) which is affixed to an engine mounted steering tube and a drag link (3.4) supplied by

the engine manufacturer
3.11
steering system

assembly including all components necessary to transmit a remote manual effort to the rudder,

outboard engine, sterndrive or water-jet drive
3.12
two-cable steering system

two independent cables attached at the interface point(s) (3.2) of the output ram(s) (3.20) and at the helm

and driven by a common steering shaft, generally used to minimize steering backlash or lost motion

2 © ISO 2020 – All rights reserved
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SIST EN ISO 8848:2021
ISO 8848:2020(E)
3.13
steering wheel

mechanical means for applying a manual steering effort to the helm, normally a circular configuration

with a continuous loop at the distal end of support spokes with the helm connected at the rotational axis

3.14
steering wheel diameter
actual diameter

diameter of the circle formed by the outermost sections of the steering wheel (3.13)

Note 1 to entry: See Figure 6.
3.15
steering wheel dish

distance between the two parallel planes formed by the aft rim surface and the forward hub surface of

a steering wheel (3.13)
Note 1 to entry: See Figure 6.
3.16
craft
small craft

recreational boat, and other watercraft using similar equipment, of up to 24 m length of hull (L )

Note 1 to entry: The measurement methodology for the length of hull is defined in ISO 8666.

[SOURCE: ISO 8666:2020, 3.15, modified – Note 1 to entry has been added.]
3.17
standard duty steering system

remote mechanical steering system (3.11) designed to the requirements of this standard for use on

small craft with outboard engines (single and dual) with a total of 15 kW and greater power, inboard

engines, sterndrives, and water-jet drives
3.18
light duty steering system

remote mechanical steering system (3.11) designed to the requirements of this standard for use on

small craft with single outboard engines between 15 kW and 40 kW power that is permanently marked

with a maximum power rating of 40 kW
3.19
mini-jet steering system

remote mechanical steering system (3.11) designed to the requirements of this standard for use on mini-

jet craft (3.8)
3.20
output ram

portion of the remote mechanical steering cable that interfaces with the outboard engine steering tube

and drag link (3.4), steering actuator or craft mounted steering tube/rudder
4 Constructional requirements

4.1 When steering systems are factory-installed in the craft, the complete system shall be supplied. In

outboard engine craft, the system shall be supplied complete to the interface point at the output ram end

as shown in Figure 1.
© ISO 2020 – All rights reserved 3
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SIST EN ISO 8848:2021
ISO 8848:2020(E)
Dimensions in millimetres
Key
1 coupler nut Mid-travel position.
2 output ram tube Flat.
3 interface point
4 end fitting
NOTE Minimum travel: 100 mm each side of mid-travel position.
Maximum travel: 115 mm each side of mid-travel position.
Coupler nut 7/8-14 UNF-2B thread (optional for boat mounted systems).
Figure 1 — Output ram

4.2 Installation of the steering system shall be in accordance with the instructions provided by the

steering system manufacturer.

4.3 Craft suitable for twin outboard engines shall be so designated, and it shall also be specified

whether the craft is suitable for engine-mounted steering systems, craft-mounted steering systems or

both. If the craft is suitable for craft-mounted steering systems, it shall also be specified whether engine

well mounting, transom mounting or both (see Figure 2) may be used.
4 © ISO 2020 – All rights reserved
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SIST EN ISO 8848:2021
ISO 8848:2020(E)
Dimensions in millimetres
a) Engine well mounting b) Transom mounting
Key
1 380 mid-travel position 7 centreline of swivel to be 0 +12 above transom
2 engine mounting face of clamp bracket 8 face of clamp bracket
3 engine centreline 9 engine centreline
4 articulation 15° min. 10 articulation 15° min.
5 7/8-14 NF.2B thread – 16 min. length on tube 11 mid-travel position
6 swivel axis 102 0 -13 square off face of transom 12 interface point
NOTE Minimum travel: 100 mm each side of mid-travel position.
Maximum travel: 115 mm each side of mid-travel position.
Figure 2 — Craft-mounted steering system

4.4 Components of the steering system shall be resistant to corrosion, either by virtue of material or

coating thereof, and shall be galvanically compatible with adjoining components.

4.5 All threaded fasteners whose integrity affects safe operation of the system, such that separation

or loss of the fastener would cause sudden loss of steering without warning, shall be provided with a

locking means.

4.6 Threaded fasteners whose integrity affects operation of the system, such that separation or loss

of the fastener would cause sudden loss of steering without warning, and that can be expected to be

disturbed by installation or adjustment procedures, shall be referenced by instructions for correct

assembly and shall either:

— be locked by a device whose presence is determinable by visual inspection, or by feel, following

assembly; or
© ISO 2020 – All rights reserved 5
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SIST EN ISO 8848:2021
ISO 8848:2020(E)

— incorporate integral locking means, provided the fastener cannot be omitted or substituted without

making the system inoperable.

NOTE Self-locking nuts with plastic inserts that create mechanical plastic interference meet the

requirements of this subclause.

4.6.1 Loose lock-washers, distorted thread nuts, or separately applied adhesives are prohibited.

4.6.2 Plain, threaded jam nuts are prohibited except that they may be used to permit adjustment and

shall then be designed so that total separation of parts or other complete loss of steering will not occur,

should they loosen.

NOTE These assemblies are not intended to be disassembled for installation; the choice of locking means is

within the discretion of the system manufacturer.

4.6.3 A locking device shall be so designed that its presence can be determined by visual inspection or

feel after installation.

4.7 Connection fittings, including quick-disconnect fittings relying only upon a spring or springs to

maintain the connection, shall not be used.
5 Outboard engine and inboard-sterndrive design requirements

5.1 The steering stops on the outboard engine shall permit at least 30° of angular movement to either

side of the centreline.

5.2 The outboard engine steering system shall meet the applicable dimensional requirements indicated

in Figures 1, 3, and 4.
Dimensions in millimetres
Key
1 engine axis Either side.
2 7/8-14 UNF-2A thread both ends
+02, 5
tube ø int. 16

NOTE 1 The tube can be threaded equal length on both ends or reversible for port steering installations.

NOTE 2 The above inner tube dimensions are for the as installed tube.
Figure 3 — Engine-mounted steering tube
6 © ISO 2020 – All rights reserved
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SIST EN ISO 8848:2021
ISO 8848:2020(E)
Dimensions in millimetres
Key
1 steering arm 3 tilt axis
2 steering axis 4 transom mating surface
Figure 4 — Engine-mounted steering tilt axis

5.3 The drag link and the necessary fittings to attach an outboard engine to the steering output ram

shown in Figure 1 shall be supplied with the outboard engine.

5.4 The outboard engine shall be designed so that, with any combination of engine turn and tilt, there

shall be no damaging interference between the engine, its accessories, and both the craft-mounted

steering system installed as shown in Figure 2 and the engine-mounted steering system, provided the

engine is designed for both systems. Appropriate written information and installation instructions shall

be provided, clearly indicating the type of steering system(s) that should be used.

5.5 All mechanical parts of a steering system transmitting steering forces shall meet the applicable

steering system component requirements in 8.2.
NOTE 1 Electrical parts of a steering system are addressed in ISO 25197.
NOTE 2 Hydraulic parts of a steering system are addressed in ISO 10592.

5.6 Outboard engines shall be designed so that the geometry ensures that the static loads defined

below, when applied at the steering-arm connection point normal to the steering arm in its plane of

operation, throughout the maximum steering arc, do not result in steering output ram loadings greater

than those specified in 8.3.1.
— 3 300 N for standard duty steering system;
— 2 200 N for light duty steering system.

5.7 The steering arm of the outboard engine shall be provided with a 3/8-24 UNF thread, or a plain

hole of 9,65 mm to 9,9 mm diameter at the connection point.

5.8 Sterndrives designed for remote mechanical steering systems shall be designed with proper

geometry to ensure that a torque of 680 Nm applied about the sterndrive steering axis does not result in

a steering component loading greater than that specified in 8.3.1.
© ISO 2020 – All rights reserved 7
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