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Mercury FourStroke 3.5 - Piston Assembly; Piston Ring Installation; Piston;Crankshaft Reassembly

Mercury FourStroke 3.5
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Powerhead
Page 4A-34 90-8M0065421 NOVEMBER 2012
12. If the valve seat contact area is too narrow and situated near the bottom of the valve face, use the 60° cutting tool to cut
the bottom edge of the valve seat. If necessary, use the 45° cutting tool to center the area of contact and set its width.
a - Previous contact width
Piston/Crankshaft Reassembly
Piston Assembly
Assemble the connecting rod to the piston. Lubricate the piston pin with 4‑Stroke 10W‑30 Outboard Oil. Install the piston pin
and secure with a new piston pin clip.
IMPORTANT: Ensure the "UP" on the connecting rod and piston are facing the same direction.
a - Connecting rod
b - Piston
c - Piston pin clip
d - Piston pin
Tube Ref No. Description Where Used Part No.
110
4-Stroke 10W-30 Outboard
Oil
Piston pin 92-858045K01
Piston Ring Installation
IMPORTANT: Use caution when installing piston rings to avoid scratching piston.
1. Install oil ring, second ring, and top ring.
IMPORTANT: The "T" on the first and second ring must face the crown of piston.
60°
a
20981
c
6366
a
b
c
d
c

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