LUBRICATION
38
Dip stick tube removal
To remove/replace the dip stick tube:
1. Remove the upper screw that secures the dip
stick tube to the fuel tank support bracket using
a 10 mm wrench.
See Figure 5.3.
2. Remove the screw at the bottom of the dip stick
tube using a 10 mm wrench.
See Figure 5.3.
3. Pull the dip stick tube out of the engine block.
4. Inspect the O-rings on the dip stick and the dip
stick tube. Replace if damaged.
5. Install by following the above steps in reverse
order.
Lubrication system
MTD uses a splash lube system for its horizontal
shaft engines. The connecting rod has a dipper on it
that “splashes” oil around the inside of the engine.
See Figure 5.4.
NOTE: The cam and the balance shaft were
removed for a better view of the lubrication sys
-
tem.
The splashing action will create an oil mist that
reaches the cylinder head. There are two oil passages
that run along the engine cylinder. The one on the top
side of the engine is the oil supply passage. The oil
mist will flow through this passage to the cylinder head.
See Figure 5.5.
Figure 5.3
Remove these
screws
Figure 5.4
Dipper
Figure 5.5
Oil supply passage
Oil return
Tappet
passages
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