1996 GTS Losing Power

[Yooper]

It starts fine, idles good and runs with power for about 10-minutes. Once it heats up the engine loses power. It does not seem to be overheating. The water seems to circulating well, good stream from discharge ports on back of craft. Plugs look good, not white.

Could it be the oil pump is failing? If so, is 50-1 the proper mix?

Thanks!

 

[Bills86e]

The oil pump lines from injection pump to the two RV spigots should be replaced every 3-4 years, as they get brittle and break. 3/32id x 3/16od x 6 1/4" long. Any
weed eater mower shop has them. Sounds like you have a lean condition from the
fuel circulatory or carb(s) & filter(s)need cleaned.

 

[Dave_eng]

I would carefully check that each fuel line going to the fuel sensor device on top of the tank is on the proper nipple. They are marked on top of the fuel sender if you look very carefully.

Crossed lines can produce symptoms like you describe. For example fuel is constantly being recirculated from the carb/pump back to the tank thru a restrictor in order to maintain some pressure at the carb but avoid vapor lock with fuel sitting in the line near something hot. Also not all ports on the fuel sensor go to the bottom of the tank. It is worth the time to rule this out!

Dave p