View Full Version : Merc 240 EFI Won't start and throttle guardian assembly burnt out

07-05-09, 05:41 PM
I have a problem where engine will not start and I saw smoke coming out of the back of the throttle guardian assembly. Have since fitted a new throttle guardian assembly and attempted an engine start. The engine did not fire at all and within 4 seconds of cranking engine, I could see the resin on rear of throttle guardian assembly starting to bulge and emitted some smoke. I have taken the original module apart and it appears an internal diode and SCR has burnt out. It seems a fault still exists on the engine side and causing the throttle guardian assembly electronics to burn out. Seadoo Challenger 2000, year 2000. Throttle guardian module is under drivers console and part number is 892230A01.Any ideas would be appreciated.<br>Thanks