2001 Maxum 2900 SCR 7.4L STOPPED PLANING OUT!

[NautiGal]

Hi guys! I am beyond thrilled to report that the problem is fixed and didn’t cost me a dime!!! =)

Mechanic decided to install a temporary “lift pump” between fuel tank and high pressure fuel pump. Said if she still wouldn’t plane out that would indicate bad fuel pump starving engine of fuel. While installing lift pump, he stumbled upon a loose clamp on a hose & replaced it...then said rather sheepishly that he was gonna feel like a complete idiot if it was just that d*mn clamp causing the problem all along! (lol) Ran her with lift pump & she planed right out so I’m figuring fuel pump is bad. Then we removed lift pump and ran her again to see what would happen. I was fully prepared for her not to plane but guess what?!? She planed out like a champ!!! So yea, it was just a loose hose clamp causing the problem all along!

Oh yea, regarding the small leak in risers that I mentioned earlier in thread…I was mistaken, mechanic said he checked risers during sea trial to make sure there was NOT a leak and there wasn’t so I just misunderstood him.

Thank you guys for all the feedback - much appreciated!!!

NautiGal (Dana)

[mmwjr]

That's great. Loose clamp allowed it to suck air.

Now get out there and enjoy the rest of the season.

[rick911]

What wot rpm are you getting now?

[Trooper2928]

Has your problem ever been resolved. I'm having the same issue after rebuilding the carb, a complete tune up, compression check, changed the fuel water separator filter. Think it has something to do with the bad fuel, or something with the tank. ie; screen or filter. Anything??????

[Phillbo]

Trooper.... Read post #31

[mmwjr]

Originally Posted by Trooper2928

Has your problem ever been resolved. I'm having the same issue after rebuilding the carb, a complete tune up, compression check, changed the fuel water separator filter. Think it has something to do with the bad fuel, or something with the tank. ie; screen or filter. Anything??????

Welcome aboard

You should start your own thread as you have a different setup, the OP has a MPI engine while you have a carb. Since it happened after the carb rebuild I would look there as something may not be set right.

[NautiGal]

I got lucky and we discovered a loose hose clamp....tightened it down & good to go now! However if too much weight in boat or full tank gas AND water she still doesn't plane very quickly. I've learned not to keep water holding tank full & that seems to do the trick.

[NautiGal]

4400 is WOT RPM now

[mmwjr]

Originally Posted by NautiGal

4400 is WOT RPM now

That’s the idle WOT. Enjoy