BOMBARDIER Johnson 90 Service Manual page 183

POWER UNIT
CYLINDER HEAD ASSEMBLY
Manifold seating faces distortion
Using a straightedge and thickness gauge, measure cylinder
head distortion to intake manifold seating faces.
Manifold seating faces distortion:
Service limit: 0.1 O mm (0.004 in)
lf measurement exceeds service limit, resurface or replace
cylinder head.
Water jackets
lnspect water jackets for clog or obstruction. Clean water
jackets if necessary.
CAMSHAFT
Cam face
lnspect cam tace for scratches and wear.
Cam wear
Measure cam height
1- f fioh
Micrometer
Cam height (8:
Standard:
90 IN
EX
115 IN
EX
36.920 - 37.080 mm (1.4535 - 1.4598 in)
36.630 - 36.790 mm (1.4421 -1.4484 in)
38.820- 38.980 mm (1.5283 -1.5346 in)
38.640 - 38.800 mm (1.5213 - 1.5276 in)
Service limit:
90 IN
EX
115 IN
EX
36.820 mm (1.4496 in)
36.530 mm (1.4382 in)
38.720 mm (1.5244 in)
38.540 mm (1.5173 in)
lf measurement exceeds service limit, replace camshaft.
6-29