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Jasbro1968 05-31-2021 01:15 PM

Mercruiser 496 crank no start
 
I would like to start out that I'm a new member. I was at a lake this past weekend and I hit a sand bar going around 10 mph and only the lower drive scraped about 6 inches. The prop is fine and the lower is scraped up with some small damage to the edge. When it started to drag i immediately threw it in neutral and turned it off and then trimmed it up. But now it will not start. I bypassed the neutral safety switch and nothing. The motor is a mercruiser 496 with a bravo one x. Any help would be appreciated

SB 05-31-2021 01:32 PM

When you turn key to crank, do you get power to yellow/red wire going to remote solenoid ? If so, power also at yellow/red on same solenoid to starter ?

Jasbro1968 05-31-2021 02:55 PM


Originally Posted by SB (Post 4791903)
When you turn key to crank, do you get power to yellow/red wire going to remote solenoid ? If so, power also at yellow/red on same solenoid to starter ?

Before I crank i have 12.5 on one side of the solenoid. when I crank I'm getting 9.5 volts on the other side. Its cranks fast but I checked for spark and nothing

techman 05-31-2021 03:01 PM

Safety switch/lanyard pulled?

Jasbro1968 05-31-2021 03:07 PM

While cranking im getting 10.8 on the yellow wire on the starter. And I checked the kill switch while I was on the water

Jasbro1968 05-31-2021 03:10 PM

I also bypassed the neutral safety switch and nothing

SB 05-31-2021 03:19 PM


Originally Posted by Jasbro1968 (Post 4791908)
Before I crank i have 12.5 on one side of the solenoid. when I crank I'm getting 9.5 volts on the other side. Its cranks fast but I checked for spark and nothing

Ok, thanks. You didn't mention it was cranking. Lol. Neutral safety switch effects crank /no crank.

Do uou have soark and fuel psi when cranking ? Does tach go to 400-400 rpm when cranking ?

edit in: i guess i didn’t read the title. Lol. Sorry

Jasbro1968 05-31-2021 03:25 PM

No spark and when cranking tack is slightly lower than 1000 and ill have to get a fuel pressure gauge

Jasbro1968 05-31-2021 08:09 PM

So I have tested the kill switch, neutral safety switch, red circuit breaker, unplugged every connection and checked the harness, checked voltage on the batteries. I'm trying to see if I can get ahold of a scanner. But I'm out of ideas. I've hit big waves that jarred the boat harder than I hit this sandbar

PA.WOODCHUCK 06-01-2021 10:56 AM

My 2002 496HO has 3 relays near ECM which all are same part number. Have U tried swaping them?


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