94 200 Hp EFI Loss of power.

[SkiThEast]

I have a 1994 Marnier 200hp EFI

I can run the **** out of it for a 10 minutes and it runs PERFECT

Once it warms up it seems like the ECU decides to cut the fuel out and it starts to miss and will'nt go over 4000 rpms.

I'll let it cool down agian and it runs like a champ again, but goes back to missing after several minutes.

Could there be too much heat building up in the engine? Does anyone know at what temp the ecu cuts the fuel pump at.

I used a meat thermomter to test the water temp out of the pee hole. After a hard run pulled back to idle it is right on 160 F and flowing strong. While running at top end its 120F and not pissing as hard as it does at idle. Is that normal?

 

[CharlieB]

Re: 94 200 Hp EFI Loss of power.

You don't have enough information to determine if it is fuel or ignition related.

Get ahold of a DVA meter and test the stator and ignition by following the proceedures listed iin Rapair/CDI Ignition Troubleshooting Guide.

 

[o/b tech]

Re: 94 200 Hp EFI Loss of power.

It may also be a fuel pump problem, either the electric pump or the pick-up pump. Try squeezing the primer bulb when the motor acts up and see if the problem stops.