My ‘95 carb’d Mercruiser 4.3L s/n OF751007 idles great all day but acts fuel starved on the water after about 10-15 minutes at 3000 rpm. Engine gradually loses power & may stall. Usually restarts instantly, then struggles to maintain 2000 rpm, stalls again, & I idle back to the launch. Bottle of Seafoam in the tank hasn’t helped yet. New fuel pickup down-tube with anti-siphon valve & all new fuel line hoses 4 years ago. New fuel/water spin-on filter yesterday. Have ordered a new electric fuel pump just-in-case. I’m pretty sure I have a fuel delivery problem. I think the OEM fuel pump Merc# 861155A6 (obsolete) pressure spec is low (6-8 psi).
Not comfortable pulling a carb, can’t test fuel pressure here at home.
Will replace fuel pump tomorrow (yes, I’m throwing some $$ at it, hoping to save $$$ in shop).
Fuel tank not venting? I can try to leave cap unlocked.
Anything else I can do to troubleshoot this, before it’s over my head, & into the shop ?
Newby 1st post here. Thanks in advance for any suggestions.
Not comfortable pulling a carb, can’t test fuel pressure here at home.
Will replace fuel pump tomorrow (yes, I’m throwing some $$ at it, hoping to save $$$ in shop).
Fuel tank not venting? I can try to leave cap unlocked.
Anything else I can do to troubleshoot this, before it’s over my head, & into the shop ?
Newby 1st post here. Thanks in advance for any suggestions.