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2022 Mercury 4 Stroke EFI 60HP Command Thrust sputtering/chugging under load

DonnieDinkler

New member
I have been struggling with this engine for a week or so now trying to troubleshoot.

Symptoms:

- Engine runs fine and then chugs at load.
- At one point the engine would completely not start, determined there was problem with the power supply connection to fuel pump in VST box. Soldered and re-installed, ran for a day and a half 0 problems.
- back to chugging at load after 10 minutes of running. I am getting a single beep every 10-15 minutes or so after replacing the fuel pump. Fuel supply to VST box is fine.

Can anyone point me to another culprit of such issues?

Thanks.
 
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