Ski-Doo Summit x 670 1998 Install guide

-I
1998
Shop Manual
Supplement
SUMMIT x 670
USE IN CONJUNCTION WITH THE SKI-DOO SHOP MANUAL P/N 484 0682 00
®

0
Legal deposit:
National Library of Quebec
4th trimester 1997
National Library of Canada1997
All rights reserved. No parts of this manual may be reproduced in any
form without the prior written permission of Bombardier Inc.
©Bombardier Inc. 1997
Technical Publications
Bombardier Inc.
Valcourt (Quebec) Canada
Printed in Canada
®*Registered trademarks of Bombardier Inc.
TABLE OF CONTENTS

I
SECTION PAGE
SAFETY NOTICE ...................................................................................................................................... III
INTRODUCTION Abbreviations list ......................................................................... IV
Serial numbers ............................................................................ IV
LUBRICATION
AND MAINTENANCE .................................................................................................... *
01 TOOLS .................................................................................................... 01-1
02 TROUBLESHOOTING .................................................................................................... 02-1
ENGINE Table of contents......................................................................... *
699 Engine ................................................................................. *
Leak test and engine dimension measurement .......................... *
CDI system (220-watt magneto system)..................................... 03-1
Oil injection system..................................................................... 04-1
Liquid cooling system.................................................................. *
Rewind starter............................................................................. *
Carburetor and fuel pump............................................................ *
Fuel tank and throttle cable......................................................... *
TRANSMISSION Table of contents......................................................................... *
Drive belt ..................................................................................... *
Drive pulley.................................................................................. *
Driven pulley................................................................................ *
Pulley distance and alignment..................................................... *
Brake ........................................................................................... *
Gearbox ....................................................................................... *
Drive chain................................................................................... *
03 ELECTRICAL SYSTEM Table of contents......................................................................... *
Wiring diagrams........................................................................... 08-1
Ignition timing.............................................................................. *
Spark plugs.................................................................................. *
220-watt magneto system .......................................................... 03-2
Theory and operation................................................................... 03-2
Testing procedure ....................................................................... 03-2
04 OIL INJECTION SYSTEM Oil injection pump ....................................................................... 04-2
05 DESS SYSTEM Component location .................................................................... 05-1
Theory and operation................................................................... 05-1
Ignition system testing................................................................ 05-3
Lighting system testing............................................................... 05-4
06 DIGITAL PERFORMANCE
MANAGEMENT (DPM)
SYSTEM
Component location .................................................................... 06-2
Theory and operation................................................................... 06-2
Testing procedure ....................................................................... 06-11
Starting procedure....................................................................... 06-12
* Refer to
1998 Shop Manual volume 2
(P/N 484 0682 00)
TABLE OF CONTENTS
$()
VOLUME 2

II
* Refer to 1998 Shop Manual volume 2 (P/N 484 0682 00)
STEERING/
FRONT SUSPENSION Table of contents ........................................................................ *
Steering system.......................................................................... *
Suspension and ski system ........................................................ *
BODY/FRAME Table of contents ........................................................................ *
Body............................................................................................ *
Frame.......................................................................................... *
07 TECHNICAL DATA Engine ......................................................................................... 07-1
Vehicle ........................................................................................ 07-2
Technical data legends................................................................ 07-3
08 WIRING DIAGRAM Wiring diagram legend ................................................................ 08-1
SECTION PAGE
TABLE OF CONTENTS
$()
VOLUME 2

III
SAFETY NOTICE 0
This manual has been prepared as a guide to correctly service and repair the 1998 Ski-Doo Summit x 670.
See model list on next page.
This edition was primarily published to be used by snowmobile mechanics who are already familiar with
all service procedures relating to Bombardier made snowmobiles.
Please note that the instructions will apply only if proper hand tools and special service tools are used.
This
Shop Manual Supplement uses technical terms which may be slightly different from the ones used
in
Parts Catalog .
The content depicts parts and/or procedures applicable to the particular product at its time of manufac-
ture. It does not include dealer modifications, whether authorized or not by Bombardier, after manufac-
turing the product.
In addition, the sole purpose of the illustrations throughout the manual, is to assist identification of the
general configuration of the parts. They are not to be interpreted as technical drawings or exact replicas
of the parts.
The use of Bombardier parts is most strongly recommended when considering replacement of any com-
ponent. Dealer and/or distributor assistance should be sought in case of doubt.
The engines and the corresponding components identified in this document should not be utilized on
product(s) other than those mentioned in this document.
Torque wrench tightening specifications must be strictly adhered to. Locking devices (ex.: locking tab,
elastic stop nut, etc.) must be installed or replaced with new ones, when damaged. If the efficiency of a
locking device is impaired, it must be renewed.
This manual emphasizes particular information denoted by the wording and symbols;
NOTE: Indicates supplementary information needed to fully complete an instruction.
Although the mere reading of such information does not eliminate the hazard, your understanding of the
information will promote its correct use. Always use common shop safety practice.
This information relates to the preparation and use of Bombardier snowmobiles and has been utilized
safely and effectively by Bombardier Inc. However, Bombardier Inc. disclaims liability for all damages
and/or injuries resulting from the improper use of the contents. We strongly recommend that any servic-
es be carried out and/or verified by a highly skilled professional mechanic. It is understood that certain
modifications may render use of the vehicle illegal under existing federal, provincial and state regulations.
◆WARNING
Identifies an instruction which, if not followed, could cause serious personal injury including
possibility of death.
-CAUTION
Denotes an instruction which, if not followed, could severely damage vehicle components.
SAFETY NOTICE

IV
INTRODUCTION 0
The 1998 Summit x 670 comprises 2 new sys-
tems compare with Summit 670. The
1998 Shop
Manual Supplement
describes how these sys-
tems operate as well as the procedures to test
them.
1. DESS switch
2. MPEM module including DPM and ignition systems
3. DPM manifold
4. Engine temperature DPM sensor
5. Air temperature DPM sensor
ABBREVIATIONS LIST
CDI Capacitor Discharge Ignition
DESS Digitally Encoded Security System
DPM Digital Performance Management
Hz Hertz (1 cycle per second)
PSI Pound per Square Inch
MAG Magneto ( magneto side)
mbar millibar
MPEM Multi-Purpose Electronic Module
PTO Power Take Off (drive pulley side)
ROM Read Only Memory
RPM Revolutions Per Minute
VDC Volt Direct Current
SERIAL NUMBERS
Each Vehicle has its Particular Vehicle
Serial Number
Serial Number Meaning
TYPICAL
1. Vehicle serial number
The engine also has a serial number.
MODELS MODEL
NUMBER
SUMMIT x 670 (CANADA) ................... 1307
SUMMIT x 670 (U.S.) ........................... 1310
A03A0IA
1
3
25
4
A00A0DA
Model no. Vehicle no.
0000 00000
A06H01A
1
INTRODUCTION

V
Liquid Cooled Engines
1. Engine serial number
-CAUTION
Most components of those vehicles are built
with parts dimensioned in the metric sys-
tem. Most fasteners are metric and must not
be replaced by customary fasteners or vice
versa. Mismatched or incorrect fasteners
could cause damage to the vehicle or possi-
ble personal injury.
A00C1QA
1
INTRODUCTION

Section 01 TOOLS
01-1
TOOLS 0
TYPICAL — ADAPTOR (P/N 529 0338 00)
A00B4HA
Fluke multimeter
(P/N 529 0220 00)
F01B1O4
APPLICATION
All models.
242 Choke nut tool
(P/N 529 0322 00)
A01B554
APPLICATION
All vehicles equipped with a
choke.
782 Programmer
(P/N 529 0355 02)
A01B5B4
APPLICATION
All models equipped with a DESS.

02-1
Section 02 TROUBLESHOOTING
TROUBLESHOOTING 0
DIGITAL PERFORMANCE
MANAGEMENT (DPM)
SYSTEM
If the DPM seems to be defective, unplug both
solenoids while the engine is running. The carbu-
ration is now identical to that of carburetors with-
out a DPM provided, of course, that all pipe
fittings are tight and that solenoids are in good
condition. None must be half-open.