1996 Gt-40 Heat Soak

I checked the impeller in the water pump, the thermostat, and the water strainer. They are all fine.

When I turn the key half way, I can hear the low pressure pump come on. Could it be vapor lock? Both days it was 96 degrees out.

Yes it does.

I telephoned PCM and they say it should not vapor lock if the fuel system is operating properly. They say check for a weak or bad low pressure fuel pump, a restricted fuel filter, or a corroded fuse in the Keep Alive Wire near the battery.

I'm going to chime in since the vapor lock theory was stated. I swear I get in my 96' if I do not lift the doghouse after sets, however it is carb'd. Ill try to make this short. In Arkansas it was hot as heck the first day we were there, made some runs as did the wife, shut it down (did not open the doghouse), sat for about 20-30 min. Went for a run and about 8 seconds in, boat started to bog down but did not die ran fine after a couple minutes. I always lift the doghouse in between sets to help with cooling, but did not this time. After the bog down I lifted the doghouse everytime we shut it down for an extended period of time and never had another issue for the rest of the week, and it got hotter (105,107,etc.) Since then I have had no issued what so ever. Last week, I went for a couple runs and after one of them we shut it down for about 20-30 minutes and I did not lift the dog house. I had a suspicion that the bog might return, as wouldnt you know it, right as I get pulled out of the water gaining speed, she starts to bog down again. Opened the doghouse anytime we stopped after that and never had any issues. Call me crazy, but I believe in the vapor lock theory.

Mark

When I shut down changing skiers I turn the blower on, but usually lift the doghouse when we are going to be sitting for a while. I have never tried the blower for an extended period of time. Kind of puts my mind at ease to really "air" it out after runs. It makes it hot as heck in the boat, but we jump in anyway so no one is really unconfortable from it.

Update on GT-40 Heat Soak and possible Vapor Lock: I took my boat to the dealer. The low pressure fuel pump tested okay. The fuel filter inside the FCC was very dirty. The line into the FCC was loose. The fuse on the "Keep Alive Wire" was not corroded, but since 1999 PCM recommends re-routing it to the 60 amp breaker at the back of the engine.

Brian, I think your on to something regarding the fuel line. I am almost certain that the fuel line is the original one, so degrading definetly could be an issue. I have cleaned the anti-siphon valve a couple times and have replaced the fuel filter. I guess I will add a new fuel line to the project list. Thanks for the input

Sorry, not "for sale" but in the diaries!