Via email to Mayhem...
I need some advice on engine fuel and engine performance, I have been running nitro cars and a raptor helicopter and been using a general fuel, unsure what fuel it is now as the label has come off, however i have now acquired a boat from a friend at work and this weekend managed to get it running on the fuel i had however not really sure if it liked it, it started and run ok but every time i put the throttle on it stalled out. The engine is a Irvine 72 and it requires a 24 volt starter to get it turning over, the boat has a speed of 60 mph and is a class racing boat so wonder if its the fuel i am using which may cause the way the engine is running.
One thing i noticed is that there appears to be air in the fuel line and if the engine stalls you can see the air traveling back up the fuel line from the motor, just prior to the engine stopping in goes from a nice tick over to high rev and the stops which i think that means running lean or fuel starvation.
The boat is fitted with a main fuel tank and then fuel is drawn from a small header tank but when i filled with fuel the header tank would not retain fuel and went back into the main tank with this in mind i took out the header tank and did not seem to make much difference.
Any suggestions on fuel and engine settings to try and get this sorted
Thanks
AB