Yamaha GCH I 237 Owner's Manual page 61

7. Remove the oil filler cap and cylinder
head cap, and then remove the engine oil
drain bolt and its gasket to drain the oil
from the oil tank.
1. Cylinder head cap
2
1
1. Engine oil drain bolt (oil tank)
2. Gasket
8. Place an oil pan under the engine to col-
lect the used oil.
9. Remove the engine oil drain bolt and its
gasket to drain the oil from the crank-
case.
Periodic maintenance and adjustment
2
1
1. Engine oil drain bolt (crankcase)
2. Gasket
3. " " mark
TIP
 A "
" mark is stamped on the crankcase
near the engine oil drain bolt.
 Dispose of used oil according to local reg-
ulations.
 Skip steps 10–12 if the oil filter cartridge is
not being replaced.
10. Remove the oil filter cartridge with an oil
filter wrench.
1. Oil filter cartridge
TIP
An oil filter wrench is available at a Yamaha
dealer.
11. Apply a thin coat of engine oil to the O-
ring of the new oil filter cartridge.
1
3
53