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Changing the Engine Oil
Service Interval: After the first 5 hours—Change the engine
oil.
Every 50 hours—Change the engine oil.
Change the engine oil every 25 operating
hours when operating the engine under a
heavy load.
If possible, run the engine just before changing the oil because
warm oil flows better and carries more contaminants.
Use automotive detergent oil with an API service classification
of SF, SG, SH, SJ, SL, or higher. Refer to your engine owner's
manual.
Use Figure 52 below to select the best oil viscosity for the
outdoor temperature range expected:
Engine Oil Capacities
Model
38660
38664
38674
1. Clean the area around the oil drain cap (Figure 53).
G016496
1. Oil drain plug
Figure 52
Engine Oil Capacity
30 to 32 oz. (0.89 to 0.95 l)
Figure 53
2. Slide an oil drain pan under the drain extension and
remove the oil drain plug.
Note: When removing the plug, ensure the tube does
not loosen.
3. Drain the oil.
Note: Dispose of the used oil properly at a local
recycling center.
4. Install the oil drain plug.
5. Fill the crankcase with oil. Refer to Filling the Engine
Crankcase with Oil.
Lubricating the Hex Shaft
Service Interval: Yearly—Lubricate the hex shaft.
Lightly lubricate the hex shaft yearly with automotive engine
oil (Figure 54).
1. Hex shaft
2. Aluminum friction plate
Important: Do not get oil on the rubber wheel or the
aluminum friction drive plate because the traction drive
will slip (Figure 54).
1. Drain the gasoline from the fuel tank.
2. Tip the machine forward onto its auger housing and
block it so that it cannot fall.
3. Remove the back cover (Figure 55).
1
1. Back cover
4. Move the speed selector lever to Position R2.
25
Figure 54
3. Rubber wheel
Figure 55
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