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20 hp electric start and pull start Mercury outboard motor

fordaboatmike

New member
What year is my 20 hp outboard motor, Serial number is 3673078. This is my first Mercury outboard, the throttle only works when it is in forward or reverse gear. Is that normal or am I missing something?
 
looks to be a 1973 model.----Throttle operation sounds normal.----Post compression numbers.----Install a new water pump impeller.
 
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