Serious loss of power. Help please

[ChevySaintsMan]

I borrowed a friends 96 gti and took it out on the lake. It ran perfectly fine for about an hour or so. Then all of a sudden it started to lose power and eventually started missing as if it was starving for gas. It had a full tank that I put in before I left. Before I used it. It had been sitting up for about a year with gas already in the tank. When I turned it off and let it sit for a while. I would start it again and take off for about 5 min no problems and the gradually it start losing power until it started sputtering again. Got it back to landing and was told I didn't put enough oil in the gas since it must be mixed because the oil injection unit was disconnect because of previous problems. So added more oil and went ran it again and got same results. Ride like the wind for a few moments and back to sputtering. Ok question is... Is it because of old gas? Is there a fuel filter that could be clogged and where is it? Or could not having enough oil been the reason for this? It's not knocking or ratteling as if anything is broken. Help please

 

[chenz48]

i would start with the easy things pump the old gas out this new gas turns into garbage really quickly.. is the instrument cluster throwing any signs that shouldn't be there like 12 volt low? then check your inline fuel filter.

 

[LouDoo]

Grey Fuel Lines

Does the ski have grey fuel lines?

Lou

 

[ChevySaintsMan]

I am not getting anything on the instrument cluster. It does have gray lines. I traced it from the tank to the engine best I could and honestly I didn't find an inline filter just one gray line from tank along the side and what seemed to be a hose clamp on the engine. I could not see it because it's underneath the air filter but did trace with my hand

 

[LouDoo]

The original grey (Tempo) fuel lines were made of two materials laminated together with an adhesive. After time 2-3years the adhesive breaks down and makes a green goo that goes everywhere in the fuel delivery system. The end result is the engine runs too lean because it is starving for gas.

The cure is to replace the grey fuel lines with 1/4" black automotive hose. You will need 20-25' depending on if you replace the vent hose, and about 20 stainless steel clamps. Just replace 1 hose at a time following the original route.

You will also need to clean or replace the main fuel filter and 2 carb. filters, 1 in each carb. Also you will need to clean or replace (I strongly recommend replacing), the fuel selector valve.

Here is a link to a how to guide on this forum for more information:

http://www.seadooforum.com/showthread.php?t=5563

Lou