Yamaha GRIZZLY 660 YFM660FAT Owner's Manual page 314

1. Engine oil drain bolt
1. Boulon de vidange de l'huile
1. Perno de drenaje del aceite de motor
To change the engine oil (with or without oil fil-
ter cartridge replacement)
1. Remove panel F. (See page 8-33 for panel
removal and installation procedures.)
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, and then remove the engine oil
filler cap.
4. Remove the engine oil drain bolt to drain the
oil from the crankcase.
8-43