Inspection And Servicing - BRP Johnson J30TEL4SUA 2007 Service Manual

POWERHEAD
PISTON, CYLINDER, AND CRANKSHAFT
WARNING
When removing or installing any type of
retaining rings, wear eye protection to
avoid personal injury.
Remove two (2) retaining rings from each piston
as shown.
1. Retaining ring
Remove the wrist pin from the connecting rod and
the piston.
1
1. Wrist pin
IMPORTANT:
Keep the connecting rods and
wrist pins with their respective pistons.
152

Inspection and Servicing

Cylinder
Use a straightedge and a thickness gauge to
measure the cylinder distortion on the gasket sur-
face at six (6) locations as shown.
The service limit for distortion is 0.0012 in. (0.03
mm). If any measurement exceeds this specifica-
tion, resurface or replace the cylinder.
The cylinder can be resurfaced using a surface
plate and #400 grit wet sandpaper. Move the cylin-
der in a figure eight pattern when sanding.
1
001539
001540
001543
001544