2000-2005 Yamaha F40B Outboard Service Manual, Page 496Get this manual

2000-2005 Yamaha F40B Outboard Service Manual, Page 496

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ENRICHMENT CONTROL SYSTEM
Measuring steps (1) Connect 12-V battery to the thermo heater plunger(2) Measure the length of the projection after applying power for five minutesThermo heater plunger