P25 Series of Engines
54
10.
Remove the two cylinder bolts using a T-30 torx
driver. See Figure 8.7.
11.
Slide the cylinder off of the piston and connecting
rod.
12.
Remove the O-ring from the cylinder base.
NOTE:
The following steps are shown only for the
purpose of failure analysis.
13.
Slide the connecting rod off of the crank pin.
14.
Carefully remove the piston rings, keeping track of
the original order and direction of installation.
15.
Remove the cap from the wrist pin bore of the pis-
ton. See Figure 8.9.
16.
Withdraw the wrist pin and remove the piston.
NOTE:
If there has been metal transfer from the pis-
ton skirt to the cylinder wall, replace the short block.
17.
Immediately reinstall the wrist pin in the small end of
the connecting rod to prevent damage to the bear-
ing. The wrist pin can be held in place temporarily
using a hair pin clip.
18.
Inspect the wrist pin, piston, connecting rod and the
connecting rod bearing for signs of wear or damage.
NOTE:
If there are any signs of wear or damage,
short block the engine.
19.
Clean the piston.
Figure 8.7
Cylinder bolts
Figure 8.8
Figure 8.9
Connecting rod
Wrist pin cap
For Parts Call 606-678-9623 or 606-561-4983
www.mymowerparts.com
Summary of Contents for 25cc
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