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5 HP Outboard • Troubleshooting & Repair Manual
Section 5 • Assembly
Piston and Connecting Rod
The piston pin is a slip fit in both the piston and connecting
rod.
1. Oil the piston pin. Assemble the piston to the
connecting rod as shown in
Figure 82 — Piston & Rod Assemblies
1
NOTE
: The word MAG cast in the flywheel side of
the connecting rod must face the same direction as
the arrow
(Figure 82)
2. Insert the piston pin from the piston pin lock side of
the piston pin bore
2
shoulder.
3. Install the piston pin lock. Be sure lock is firmly set in
groove.
Piston Rings
Correct piston ring positions are shown
Figure 83 — Piston Rings
5
1
5
2
3
1. Install the expander
(Figure 83)
ring
first, followed by the center ring
3
ring
.
1
ASSEMBLY
.
2
on top of the piston.
1
until the pin stops against the
.
4
and oil control
4
and top
2
2. Install the center and top rings with the ID mark
facing the top of the piston.
Compress Piston Rings
1. Oil the piston rings and piston skirt.
2. Compress the piston rings with Ring Compressor
(#19230)
(Figure 84).
Figure 84 — Ring Compressor
3. Place piston and compressor upside down on bench
and push piston down until head of piston is even with
edge of compressor.
4. Tighten compressor until piston cannot be turned.
5. Loosen compressor until piston can be turned with
slight resistance
(Figure 85).
Figure 85 — Piston Assembly Ready To Install
NOTE
: Do not attempt to install piston and ring
assembly without ring compressor.
49
5
5
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