BRP Johnson J25R4SUR - Cleaning;Inspection

151
POWERHEAD
CRANKSHAFT, PISTONS AND CAMSHAFT
7
Remove circlip and washer from camshaft timing
gear.
Remove no. 1 gear and spring plate.
Cleaning/Inspection
IMPORTANT: If cracks, excessive wear, or other
damage is found on any component, replace com-
ponent.
Camshaft
Inspect cam face and journals for pitting,
scratches, wear, or damage. If any of these condi-
tions are found, replace camshaft.
Use a micrometer to measure the cam height. If
measurement is outside service limit, replace
camshaft.
Inspect decompression parts (rope start models).
If abnormal movement is found, replace camshaft.
1. No. 1 gear
2. Spring plate
005705
1. Circlip
2. Washer
005706
1. No. 1 gear
2. Spring plate
005707
1
2
21
1
2
1. Cam height 005708
Cam Height Specifications
Standard Service Limit
IN
1.2961 – 1.3024 in.
(32.921 – 33.081 mm)
1.2922 in.
(32.821 mm)
EX
1.2961 – 1.3024 in.
(32.921 – 33.081 mm)
1.2922 in.
(32.821 mm)
1. Decompression parts 005709
1