1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 36Get this manual

1998 Mercury 9.9/15HP 4-stroke outboards factory service manual, Page 36

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GENERAL INFORMATION

Compression Check
1 Remove spark plugs2 Install compression gauge in spark plug hole3 Hold throttle plate at W.O.T4 Crank the engine over until the compression r

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