CYLINDER BLOCK/CRANKCASE
Page 4B-2990-857046R1 NOVEMBER 2001
Piston Ring Installation
IMPORTANT: Use caution when installing piston rings to avoid scratching piston.
1. Install the oil ring components as shown. Spread rings just enough to slip over piston.
2. Install the second and top compression rings (“T” side up). Spread rings just enough to
slip over piston.
3. Offset the piston ring end gaps.
4-stroke Outboard Oil
110
110
UP
50°
91-24697
g
h
i
j
k
a
b
c
f
e
d
110
a-Oil Ring Spacer
b-Bottom Rail
c-Top Rail
d-Second Compression Ring (“T” side up)
e-Top Compression Ring (“T” side up)
f-“T” Mark Should Face Piston Crown
g-End Gap – Top Compression Ring
h-End Gap – Second Compression Ring
i-End Gap – Upper Oil Ring Rail
j-End Gap – Lower Oil Ring Rail
k-End Gap – Oil Ring Spacer
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