Chapter 5: Lubrication
52
Dip stick tube removal
Some MTD engines come with a dip stick tube,
depending on the application. See Figure 5.3.
To remove/replace the dip stick tube:
1. Remove the dip stick.
2. Remove the screw at the top of the dip stick
tube. 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. See Figure 5.4.
5. Install by following the above steps in reverse
order.
Lubrication system
MTD uses a splash lube system for it’s vertical shaft
engines. The governor gear has paddles on it that
“splashes” oil around the inside of the engine.
See Figure 5.5.
The splashing action will also atomize or change the oil
into a mist. 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. The supply
passage lines up with the top crank arm so that some
of the oil on the crank arm will be flung into the supply
passage, forcing additional oil up to the cylinder head.
See Figure 5.6.
Figure 5.3
Dip stick
tube
Screw
Figure 5.4
Figure 5.5
Governor
gear
Paddles
Figure 5.6
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