Yamaha WOLVERINE 350 YFM25XX Owner's Manual page 83

To change the engine oil (with or without oil fil-
ter cartridge replacement)
1. Place the ATV on a level surface.
2. Start the engine, warm it up for several min-
utes, and then turn it off.
3. Place an oil pan under the engine to collect
the used oil.
4. Remove the engine oil filler cap, and then re-
move the engine oil drain bolt to drain the oil
from the crankcase.
1. Engine oil drain bolt
NOTE:
Skip steps 5–7 if the oil filter cartridge is not being
replaced.
5. Remove the oil filter cartridge with an oil filter
wrench.
1. Oil filter cartridge
1. Oil filter wrench
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