Yamaha GCH I 237 Owner's Manual page 59

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 The oil filter cartridge should be re-
placed after the first 800 km (500 mi) of
operation, and every 20000 km (12000
mi) of operation thereafter.
To check the engine oil level
1.
Place the snowmobile on a level surface
and apply the parking brake.
2.
Start the engine, warm it up for 10–15
minutes, and then turn it off.
TIP
 The engine can also be warmed up by op-
erating the snowmobile for 10–15 minutes.
 After operating the snowmobile, allow the
engine to idle for at least 10 seconds be-
fore turning it off.
3.
Open the shroud.
4.
Disconnect the oil level gauge coupler.
NOTICE: Disconnect the oil level
gauge coupler before removing the oil
filler cap, otherwise the cable could
twist and break.
Periodic maintenance and adjustment
[ECS00453]
1. Oil level gauge coupler
2. Oil filler cap
5.
Remove the oil filler cap, wipe the dip-
stick clean, insert it back into the oil filler
hole (without screwing it in), and then re-
move it again to check the oil level.
1. Oil filler cap
2. Dipstick
TIP
The engine oil should be between the "H" and
"L" level marks on the dipstick.
51

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