Merc 496HO sudden shutoff!
05-16-2017, 05:14 PM
#1
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Join Date: May 2017
Location: Baton Rouge, LA
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Merc 496HO sudden shutoff!
Was out for the Tickfaw 200 last weekend and my motor just shut off all of the sudden... there were two or three beeps, and then nothing. It would turn over, so it wasn't the battery. Seemed like either no fire or no fuel. Had a full tank of non-ethanol Premium. I suspect either a burnt fuse controlling the EFI or the fuel pump. No popping, stuttering or intermittent on-off. Haven't pulled the cover off yet... will try this weekend.
Any ideas???
Any ideas???
05-16-2017, 06:05 PM
#2
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Crank Position sensor especially if you have NO TACH SIGNAL
next fuel pump(s) working - check for fuel pressure with key on and while cranking.
Scan engine for codes and available power % - if available power shows 100 percent you are not in any form of guardian mode.
next fuel pump(s) working - check for fuel pressure with key on and while cranking.
Scan engine for codes and available power % - if available power shows 100 percent you are not in any form of guardian mode.
05-17-2017, 05:25 PM
#3
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Was out for the Tickfaw 200 last weekend and my motor just shut off all of the sudden... there were two or three beeps, and then nothing. It would turn over, so it wasn't the battery. Seemed like either no fire or no fuel. Had a full tank of non-ethanol Premium. I suspect either a burnt fuse controlling the EFI or the fuel pump. No popping, stuttering or intermittent on-off. Haven't pulled the cover off yet... will try this weekend.
Any ideas???
Any ideas???
Edit: BTW if this is a stock 496 you don't need premium fuel
