Ponyjumper
New Member
Hello! I have a 2002 Seadoo challenger 2000 with a Mercury 240 EFI engine. Worked great last summer. Now it will only turn on and stay running for 10-20 seconds and shuts off. Will start right back up every time again. Replaced the lift pump and was told it was the ECU is bad. Bypassed everything possible in the ECU and it is still doing it. Tried another ECU and same thing. It has spark, fuel, power to everything. Wired up the fuel pumps separately to make sure they were working. When the starter disengages it stops running. It will stay running with the key turned as if you were trying to start it. Nothing wrong with the key. Is there anything that we may be missing? It has a new starter, new fuel, new battery. Maybe something simple?