LTR 330HP: Bad Fuel Pump, Bad Gas, or something else?

[beatle78]

Hi guys,

I fired up the '01 205V w/ the LTR last weekend. It didn't go so well.

The boat would run great for about 3-5 minutes while pulling someone and then it would bog down and not go above ~1500 RPMs. If I let the boat sit at idle at the dock for awhile, I could go back out and it would run great for about 3-5 minutes and then do the same.

It did it on Sun first once or twice, then it went away and semeed to run fine as I went around the lake at 4k RPMs for 10 minutes or so. Then Monday it kept doing it and never got any better.

I put in dry gas & high test gas in case there was moisture in the fuel & I let it idle for about 30 minutes. No luck.

Any ideas for how to diagnose this?

Thanks!
Jeremy

[jwroblew]

Had the same problem, completely drained my gas tank, took care of the problem.

[oldairboater]

I would check or replace fuel filters first. Then I would suspect gas next. We have a problem here with humidity and 10% alcohol in the gas.

[beatle78]

From reading the forum, I don't think it's the fuel filter which on this design is inside the gas tank. If the tank is over 1/4 tank the fuel bypasses the fuel filter(which is a pretty poor design if you ask me).

So it could be bad gas. I've had 4 things of drygas and 10-15 gallons of new gas added and it's been sitting for a few days. Perhaps the dry gas is doing it's trick and I can go out and retest it.

Last year was the first year, I didn't mostly fill my fuel tank before winter storage. I only had it ~1/2 full w/ Stabile.

[repeeples]

sounds like your boat may be going into RPM reduction to prevent overheating.

my boat (ps 190 with LTR) did the same thing last year. after trying every fuel system 'fix' (even replaced the fuel pump), we found a partial obstruction of the raw water intake.

the boat sits idle and cools off a bit, then goes out of RPM reduction mode, then it heats up again once you rev it and goes back into RPM reduction.

[beatle78]

hmmm.... my Temp guage never seems to get over 180F, but it's still possible.

I will check out the lines and impeller too, thanks.

[jraben8]

That may be it. My temp really never rises much above 155-160 unless I'm footing and shut it off immediately. When it restarts it might be around the 190 mark but not for long.

[Granite_33]

What raben said.

180F seems high.

Operating temp should be in the 155-160 range.

If the 180 temp is the temp your engine sees consistently, then you may want to focus on the cooling system.

[beatle78]

ok, thanks. Maybe my impellar started to shred & is clogging the water intake. I'll go check that stuff out. Thanks guys.

I never even thought about the limp mode.

[beatle78]

limp mode it was! Thanks guys!...... impeller was fine, cold water intake was clogged (funny story).

I put duct tape over the cage under the hull when I winterize it. I forgot to take the duct tape off. it was partially off, but apparently not enough to cool 100%.

OK, get this... I ran out of gas for the first time ever yesterday I normally do not let it go down below 1/4-1/2 tank.

Right after that it started running like it was in limp mode again.... We put 15 gallons in & started to go out and it started skipping around 2k RPMs. It felt like limp mode, but my fear is the fuel pump. I'll know more when I get home from work & try it again today.

Thanks.