Engine Shop Manual - ROTAX 717 and 787 RFI Engines

Oct 23, 2026

Technical engine shop manual for ROTAX 717 and 787 RFI engines, covering safety notice and structured maintenance procedures. Includes general information, engine identification number and engine emissions information, plus tightening torques and manual arrangement guidance. Provides detailed engine measurement methods (cylinder head warpage, cylinder taper, out-of-round, combustion chamber volume, piston/cylinder clearance, ring/piston groove clearance, ring end gap, and crankshaft checks), followed by system-level service topics such as leak testing and magneto, top end, bottom end, and rotary valve procedures.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages117

Reading Time4 h 55 min

AccessFree to download

Safety Notice

Introduction

General Information

Engine Identification Number (E.I. N.)

Engine Emissions Information

Tightening Torques

Arrangement of This Manual, Illustrations and Procedures

01 Engine Measurement

01 – Measurement Procedures

Cylinder Head Warpage

Cylinder Taper

Cylinder Out of Round

Combustion Chamber Volume Measurement

Piston/Cylinder Wall Clearance

Ring/Piston Groove Clearance

Ring End Gap

Crankshaft (Assembled Engine)

Crankshaft (Disassembled Engine)

Rotary Valve

02 717 Engine

01 – Leak Test

02 – Magneto System

03 – Top End

04 – Bottom End

05 – Rotary Valve

2005 Engine Shop Manual ROTAX ® 717 and 787 RFI™ ENGINES Legal deposit: National Library of Quebec National Library of Canada 2005 All rights reserved. No parts of this manual may be reproduced in any form without the prior written permission of Bombardier Recreational Products Inc . (BRP) . © Bombardier Recreational Products Inc . (BRP) 2005 Technical Publications Bombardier Recreational Products Inc . (BRP) Valcourt (Québec) Canada Printed in Canada ®™ Registered trademarks of Bombardier Recreational Products Inc . (BRP) or its affiliates . * Trademark of Bombardier Inc . used under license. BOMBARDIER LUBE® RFI™ Rotax® SEA-DOO® Sea-Doo Synthetic Grease TOPS™ This document contains the trademarks of the following companies: Loctite® is a trademark of Loctite Corporation Molykote© is a trademark of Dow Corning Corporation Snap-on® is a trademark of Snap-on Tools Corporation TABLE OF CONTENTS | SAFETY NOTICE III | | --- | | INTRODUCTION ................................................................................... IV
GENERAL INFORMATION .......................................................................................... IV
ENGINE IDENTIFICATION NUMBER (E.I. N.) .................................................................... IV
ENGINE EMISSIONS INFORMATION ............................................................................ IV
TIGHTENING TORQUES ........................................................................................... IV
ARRANGEMENT OF THIS MANUAL, ILLUSTRATIONS AND PROCEDURES ............................. V | | 01 ENGINE MEASUREMENT
01 – MEASUREMENT PROCEDURES............................................................................. 1
CYLINDER HEAD WAR PAGE ........................................................................................ 1
CYLINDER TAPER ..................................................................................................... 1
CYLINDER OUT OF ROUND ......................................................................................... 1
COMBUSTION CHAMBER VOLUME MEASUREMENT ........................................................... 1
PISTON/CYLINDER WALL CLEARANCE ............................................................................ 2
RING/PISTON GROOVE CLEARANCE ............................................................................... 4
RING END GAP ........................................................................................................ 5
CRANKSHAFT (ASSEMBLED ENGINE) ............................................................................. 5
CRANKSHAFT (DISASSEMBLED ENGINE) ......................................................................... 6
ROTARY VALVE ........................................................................................................ 8 | 02 717 ENGINE 01 – LEAK TEST .................................................................................................... 11 GENERAL ............................................................................................................. 11 PREPARATION ....................................................................................................... 11 TESTING PROCEDURE .............................................................................................. 11 ENGINE LEAKAGE DIAGNOSTIC FLOW CHART .................................................................. 15 02 – MAGNETO SYSTEM ......................................................................................... 17 DISASSEMBLY ....................................................................................................... 19 CLEANING ............................................................................................................ 21 ASSEMBLY ...............................................................................................

FAQs

What measurements are covered in the engine measurement procedures?

The manual specifies cylinder head warpage, cylinder taper, cylinder out-of-round, combustion chamber volume measurement, piston/cylinder wall clearance, ring/piston groove clearance, ring end gap, and crankshaft checks for assembled and disassembled engines, plus rotary valve content.

How is the 717 engine leak test organized?

The leak test section includes a general part, preparation steps, a testing procedure, and a diagnostic flow chart for engine leakage.

Which engine service systems are covered after measurement?

After measurement, the manual lists service sections for the 717 engine including the magneto system, top end, bottom end, and the rotary valve, each with general, disassembly, cleaning, inspection, and assembly topics where applicable.

Oct 23, 2026

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