Crankshaft And Piston To Cylinder; Conrod Cap - BRP Johnson 4HP Service Manual

Crankshaft and Piston to Cylinder

1. Apply engine oil to the crankshaft journals and pin.
2. Apply Triple-Guard grease to the lip of the upper oil seal.

Triple-Guard grease
3. Install the crankshaft to the cylinder block.
4. Apply engine oil to the piston and the cylinder wall.
5. Insert the piston / conrod assembly into the cylinder bore
from the cylinder head side using the special tool.

Piston ring compressor
NOTE:
Position the "circle" mark on the piston head to the flywheel
side.

Conrod Cap

1. Apply engine oil lightly to the conrod bolts.
2. Install the conrod cap in the direction as shown in the fig-
ure.
3. Tighten the two conrod bolts to the specified torque in
two steps.

Conrod bolt:
1st step 10 N·m (1.0 kg-m; 7.0 lb-ft)
2nd step 21 N·m (2.1 kg-m; 15.0 lb-ft)
POWERHEAD
REASSEMBLY
6-35