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5 HP Outboard • Troubleshooting & Repair Manual
Section 3 • Disassembly
7. Slowly relieve tension on spring and retainer.
8. Remove retainer, spring, valve and valve stem seal
(intake only). Discard valve stem seal.
9. Repeat for exhaust valve.
NOTE: If push rod guides
replace before installing cylinder head plate.
Crankshaft & Camshaft
Before removing the crankshaft from the engine, remove
rust, paint, or burrs from the PTO end of crankshaft. This
will reduce the chance of damaging the oil seal, sump or
sump bearing.
1. Drain oil from crankcase.
2. Remove seven screws
crankcase sump. If the sump sticks, tap lightly with a
soft hammer on alternate sides near dowel pins.
Figure 45 — Remove Sump Cover
NOTE:
It is not necessary to remove dowel pins.
3. Tip engine over onto flywheel side of crankcase.
4. Support engine to prevent end of crankshaft from
resting on workbench.
5. Rotate crankshaft until timing mark on crankshaft
aligns with timing mark on camshaft
(Figure 46)
2
.
3
are worn,
(Figure 44)
7
, to remove
(Figure 45)
1
1
Figure 46 — Engine Timing Marks
3
6. With camshaft in this position, the valve tappets will
remain clear of cam lobes. Lift out camshaft.
7. Remove tappets.
Oil Slinger Lubrication
The oil slinger
(Figure 47)
The oil slinger lubricates the valve tappets, connecting rod,
cylinder, piston and rings.
Figure 47 — Oil Slinger Assembly
1. Remove the sump to access the oil slinger.
2. Inspect the slinger gear teeth for wear, broken teeth,
broken slinger paddles, or burrs on teeth. Replace if
worn or damaged.
29
2
is driven by the cam-gear
1
2
3
.
2
1
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