CHECK PISTON PROTRUSION (Refer to Figure 14.)
This procedure applies to both/either cylinder.
Feeler Gauge with 0.004 and 0.008 inch leafs
Piston assembly installed in cylinder
Slowly rotate flywheel to the right until piston (1) is at TDC (highest point).
Figure 14. Piston Protrusion Check
Using a feeler gauge and a machinist's rule (or other straight edge) as illustrated, verify piston (1) is above top of
cylinder (2) by 0.004 to 0.008 in. (0.1-0.2 mm). If measurement is within this range, piston (1) protrusion is satisfactory.
If reading is less than 0.004 in. (0.1 mm) above top of cylinder (2), gaskets (3) must be added between cylinder and
crankcase. If reading is more than 0.008 in. (0.2 mm) above top of cylinder (2), gaskets (3) must be removed between
cylinder and crankcase.
When adding or removing cylinder gaskets, measure thickness of gasket(s) to ensure
proper range will be attained.
Remove cylinder (2) from piston (1). Add or remove gaskets (3) as required to obtain piston (1) protrusion of 0.004 to
0.008 in. (0.1-0.2 mm).
Slide cylinder (2) over piston (1) and press into crankcase.