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BRIGGSandSTRATTON.COM
Figure 72
Check Ring End Gap
It is recommended that the entire ring set be replaced when
servicing the piston and/or cylinder bore. However, the
original rings can be re-used if they are not damaged and
are checked as follows:
1. Clean all carbon from the rings and the cylinder bore.
2. Insert an original ring (
A
, Figure 73) approximately one
inch down into the cylinder bore.
3. Check end gap with feeler gauge. Compare with reject
dimensions listed in
Engine
Specifications
. If gap of
any of the rings exceeds the reject dimension, all rings
should be replaced.
Figure 73
Check Connecting Rod
If the crankpin bearing (
A
, Figure 74) or the piston pin
bearing (
B
) is scored, the rod must be replaced.
1. Reinstall rod cap and bolts on rod.
2. Using a dial caliper or plug gauge, measure the two
bearing diameters. Compare with reject dimensions
listed in
Engine
Specifications
. If either bearing exceeds
the reject dimensions, the rod must be replaced.
3. Remove rod bolts and rod cap. Set aside.
Figure 74
Assemble
1. Install a pin retainer into one groove in piston bore.
2. Oil the piston pin bore, connecting rod pin bore, and
the pin. Insert rod into piston, then slip pin through
piston and rod bores until it seats against the retainer
or shoulder stop.
NOTE:
The notch or arrow (
A
, Figure 75) on the piston and
“MAG” on the rod (
B
) must face the same direction. When
installed in the engine, the notch will face the flywheel.
Figure 75
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