Ski-Doo Formula S 1998, Shop Manual

Page: 107 / 338

Section 04 ENGINE
Subsection 04 (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)
04-04-10
CONNECTING ROD/CRANKPIN
CLEARANCE
CRANKSHAFT END-PLAY
277 Engine Type
Adjustment
Crankshaft end-play is adjusted with shims locat-
ed between crankshaft and magneto side bear-
ing.
1. Distance ring
2. Shim location
3. Bearing
4. PTO
5. MAG
The following is required for the adjustment
procedure:
– adjustment shims (refer to parts catalog)
thicknesses available: 0.10 mm (.004 in)
0.20 mm (.008 in)
0.30 mm (.012 in)
0.50 mm (.020 in)
1.00 mm (.040 in)
– micrometer
– caliper
Total shim thickness needed for the end-play ad-
justment is determined with the following proce-
dure:
a. Measure crankcase halves as illustrated (M
1
and M
2
).
A standard compressed crankcase gasket will
have a 0.30 mm (.012 in) thickness (M
3
). Add
these measurements to obtain dimension A.
MEASURING M
1
AND M
2
1. Bearing seat
ENGINE
TYPE
NEW PARTS
MIN. - MAX.
WEAR
LIMIT
All
0.03 - 0.012 mm
(.0001 - .0005 in)
0.015 mm
(.0006 in)
ENGINE
TYPE
NEW PARTS
MIN. - MAX.
WEAR
LIMIT
277
0.020 - 0.030 mm
(.0008 - .0012 in)
0.05 mm
(.0020 in)
377, 443 and
503
0.020 - 0.033 mm
(.0008 - .0013 in)
ENGINE TYPE MINIMUM MAXIMUM
277
0.10 mm
(.004 in)
.030 mm
(.012 in)
A01C1NA
3
1
5
4
2
-
CAUTION
Always install end-play adjustment shims
on the magneto side between bearing and
crankshaft counterweight.
A01C0TA
1