POWERHEAD
Page 4-46 90-826883R2 JUNE 1998
Cylinder Block
CAUTION
Piston rings must be properly positioned with locating pin between piston ring
end gaps. Improperly positioned piston rings will break during installation.
1. Lubricate piston rings, piston and cylinder wall with light oil.
2. Keeping crankshaft horizontal, guide pistons into cylinder bores.
3. Align hole in center main bearing race with pin of cylinder block.
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a
b
c
c
a - Hole
b - Pin (Hidden)
c - Align Pin In Slot
4. Positionalignmentbossofuppercrankshaftrollerbearingintonotchincylinderblock.
5. Gently push seals inward to seat.
6. Checkeach piston ring for spring tensionthru transferand exhaustports bypressing
witha screwdriver.Ifnospringtensionexists(ringfailstoreturntoposition),itislikely
that the piston ring was broken during assembly [replace broken piston ring(s)]. Use
caution not to burr piston rings while inspecting.
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