Ski-Doo FORMULA 500 1997, Shop Manual

Page: 77 / 352

Section 03 ENGINE
Sub-Section 03 (454, 494, 583 AND 670 ENGINE TYPES)
03-03-6
TYPICAL
1. Draining hole
2. Passages
NOTE: Oil dripping from draining hole indi-
cates a loosen clamp or damaged bellows.
Check for cracked, dried or perforated bellows
no. 9 .
6, Spring
Make sure both springs installed on the engine
have same characteristics.
ASSEMBLY
At assembly, place the pistons over the connect-
ing rods with the letters “AUS” (over an arrow on
the piston dome) facing in direction of the exhaust
port.
1. Exhaust
Use piston pin puller (P/N 529 0210 00) to ease
piston pin installation.
To minimize the effect of acceleration forces on
circlip, install each circlip so the circlip break is at
6 o’clock as illustrated. Use piston circlip installer
(P/N 529 0169 00) for all engines except 670 and
(P/N 290 8770 16) for 670 engine.
1. Place circlip in
2. Restrain
3. Oil
ENGINE
TYPE
SPRING
P/N
WIRE
DIA.
FREE
LENGTH
PRELOAD IN
N (LBF) AT
COMPRESSED
LENGTH
mm
(in)
mm
(in)
OF
14.7 mm
(.579 in)
454
420
2399 45
1.0
(.039)
48.5
(1-29/32)
0.0203
(.00455)
583
and 670
420
2399 48
1.0
(.039)
38.0
(1-1/2)
0.0163
(.00365)
1
2
A24C05A
'
A01C01A
AUS
1
A01B1QA
1
2
3
529 0169 00