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#11106289 - 09/15/15 09:26 PM Mercury outboard help.
Kyle405 Offline
Outdoorsman

Registered: 06/26/15
Posts: 238
Loc: Mansfield, TX.
My elderly neighbor has a 16 foot 1995 basstracker in great shape with the original 40 HP 2 stroke Mercury outboard. . I have helped him change out the water pump/impeller and other stuff in the past. The motor has always started up right away since he's had it and ran great. Lately the motor won't start unless I pull off the fuel line from the gas tank (fuel tank is in the compartment) to the motor. The motor then starts without the fuel line connected. I put the fuel line back on after it starts and it runs normal again. I checked the carb tonight for him and it looks fine. I cleaned it and didn't see why the Jets would need adjustment. My senses are telling me it's getting too much fuel during start up? The prime bulb pumps plenty of gas when I pump it when it's disconnected from the motor.

Anyone encounter this problem in the past? Any tips, troubleshooting ideas?

Thanks for the help.


Edited by Kyle405 (09/15/15 09:27 PM)

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#11107060 - 09/16/15 09:22 AM Re: Mercury outboard help. [Re: Kyle405]
gary purdy Offline
TFF Guru

Registered: 05/24/03
Posts: 11220
Loc: Littlefield Tx & Lake A. H. US...
Has to be the carb or the fuel pump leaking by causing motor to be rich. If you don`t see fuel leaking at the carb, I would change the fuel pump diaphragm.
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