Service Manual

6-3
Table of Contents
Lubrication
Twin Cylinder Engine Service Manual
February 2017 - Digital Edition
LUBRICATION SYSTEM
This section covers the components for the lubrication system. The system uses a gerotor pump to provide
pressurized oil to the following critical bearing surfaces; upper and lower crankshaft, connecting rod journals.
Oil Flow
Oil Filtration: Mesh screen in crankcase sump cover, spin-on oil lter.
Oil Pressure Circuit: Gerotor Pump (gear pump) located at the lowest point of the crankcase sump. Driven
by the camshaft, draws oil through the screen and creates pressurized oil. Pressure relief valve is located in
the crankcase sump and protects the pressurized circuit from over pressure, exits the sump cover/enters the
crankcase, ows through the oil lter. Pressurized and clean, ow splits, upper and lower crankshaft bearing. The
lower crankshaft bearing is cross drilled allowing oil ow to the connecting rod journals. Each rod cap has an oil
relief for maximum lubrication.
Maintenance
No tools oil change
NOTE: Change the oil when engine is warm.
1. Clean external areas of the engine.
- Dipstick and Tube
- Oil Filter
- Drain Hose
2. Remove the oil drain hose from the blower shroud.
-Unwind hose from the cleat,
-While twisting, pull downward on the hose (Figure 2).
Figure 2