2000-2005 Yamaha F40B Outboard Service Manual, Page 88Get this manual

2000-2005 Yamaha F40B Outboard Service Manual, Page 88

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.1CONTROL SYSTEM
(3) Start the engine and warm it up to check the engine for stability(4) If the engine speed is unstable, follow the steps as below(5) Install the tachometer onto the spark plug

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