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Engine stalls

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Brian Kearney

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2003 350 mag alpha one stalls

2003 350 mag alpha one stalls after engine is warm. There is no warning engine just shuts off like you hit the kill switch. Engine always starts right back up with normal crank time. Problem will occur 6 or 7 times in a row and then come out of it. Changed ignition switch and bypassed kill switch and still happens. Also replaced main harness going from front of boat to engine harness. Engine never stalls at idle. Has stalled anywhere from 25 to 45 mph. Problem has occured since boat had about 20 to 30 hours on it. Engine now has 150 hours on it. Any ideas?
 
Thanks for answering. The engi

Thanks for answering. The engine is an EFI. A bad ECM does kind of make sense. Is there any chance an ignition control module or crank sensor could also be causing this. I hate to throw a bunch of money at this but it kind of looks like thats what i'm down too.
 
That's EFI systems for you

That's EFI systems for you. You might start your search with a code reader (and get lucky).

Jeff
 
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