Merc 496HO sudden shutoff!
05-16-2017 | 05:14 PM
#1
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Joined: May 2017
Posts: 1
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From: Baton Rouge, LA
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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Joined: Jul 2011
Posts: 9,594
Likes: 45
From: Ft. Worth TX
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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Joined: Nov 2009
Posts: 4,197
Likes: 500
From: KY
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
