60 HP Mercury 4 stroke cuts off when warms up.

LarryA657

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Nov 13, 2024
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My 60 Mercury 4 stroke cranks and runs fine until it warms up (about 3 miles). Then it bogs down and will only idle.
 

alldodge

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Staff member
Joined
Mar 8, 2009
Messages
42,067
Thanks
Looks like your motor uses a vapor separation tank VST

Not real familiar with your motor but find the VST and look for a schrader valve (bicycle tire fitting) which will have a plastic cap on it.

Find/rent a fuel pressure gauge and attach to it. Then run the motor and watch the pressure to see if it falls off. I'm guessing the pressure is dropping off or the VST is not staying full

Your motor has a TFI system which feeds the injectors. The fitting might be on it

The ECM will have a connector next to it, which a scanner can be attached to see if there are any codes

Are you hearing any beeps?
 
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