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Installation procedure
Installation: Connecting rod bearings
CAUTION
• Do not reverse the positions of the lower bearing and the
upper bearing (with oil hole) when installing, as this may
cause seizure in the engine.
Installation: Piston and connecting rod
• Check that the piston ring end gaps are in their correct positions.
A: 1st compression ring gap
B: 2nd compression ring gap
C: Oil ring gap
D: Oil ring expander spring gap
“ ”: Front mark on piston
• Ensure that the size mark (“A”, “B”) on the piston is the same as
that on the cylinder liner.
• Face the front mark “ ” of the piston toward the front of the en-
gine.
• With and installed around the piston skirt, tighten the
adjusting bolt of until the inside diameter of matches
the outside diameter of the piston skirt.
• After adjustment, remove and from the piston. Apply
engine oil to the following areas. Then, install and
over the rings of the piston.
• Outer periphery of piston
• Inner periphery of
• Inner periphery of cylinder liner
CAUTION
• Cover the connecting rod bolt with a vinyl hose to prevent
the connecting rod bolt from damaging the inside surface
of the cylinder and crankshaft.
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