20 hp merc.


Old 02-14-01, 06:02 AM
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My 20 hp merc will not rev up, it runs ok but when I put it in gear it will not rev up.
If I remove the bottom spark plug lead and let it idle
for 5 10 seconds , then push the lead back on, with the motor still running, it starts
to operate properly. Do you have any ideas what the problem may be?
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Old 02-14-01, 07:29 PM
BoatMech's Avatar
Join Date: Dec 1999
Location: Los angeles
Posts: 592
We will assume you already replaced the spark plugs,
are running a good gas/oil mix and have a water supply to the engine.
many problems on mercs can be traced to poor grounds.
check over the electrical system and clean off any corroded terminals.
put a spark checker in the lead and see if it jumps a 1/2'
gap and stays blue.
it still could be a stator or trigger but check the grounds first.

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