2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 417Get this manual

2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 417

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FUEL INJECTION SYSTEM
OIL PRESSURE SWITCH 1 Disconnect: Oil pressure switch coupler 2 Connect: Pocket tester (to the switch coupler)

3 Inspect: Oil pressure switch continuity Switch