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Hard Landing Kills Motor ?

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Old 06-30-2003, 11:24 AM
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Default Hard Landing Kills Motor ?

Was out running yesterday, it was a little bumpy and I was real loose and sure enough found one of those out of nowhere oh **** waves and launched it big. Landed hard, was applying throttle for reentry and everyone is getting thrown forward. The engine cut out upon landing.

Tried starting the motor, turning over just fine but not firing. After three or four times with giving it gas, started just fine ran just fine no more problems. My question is what happened ? I had 3/4 of a tank of gas so I know the rough conditions wouldn't affect the fuel jumping in the tank. Tell me what you think.

Dano,
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Old 06-30-2003, 11:26 AM
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Is it Carburated? May have gotten a float stuck
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Old 06-30-2003, 11:27 AM
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fuel injected or carb motor?
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Old 06-30-2003, 11:31 AM
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If it's an EFI or computer-controlled engine, a hard landing can sometimes trigger the low oil pressure switch, and cause the engine to go into "slow" mode, or even shut itself off. If this is done by cutting the fuel, it will be hard to restart until the intake tract is wetted down with fuel again. Sometimes, this can be cured by re-mounting the oil pressure switch or sensor on a 90 degree elbow so that it is horizontal instead of vertical. That way, a vertical impact is less likely to set it off.

If you're carbuerated, I will defer to the carb experts.

The other possibility is a bad electrical connection in the ignition or battery circuits. Don't forget to check your killswitch lanyard switch. (You DO have one, don't you?)
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Old 06-30-2003, 12:00 PM
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If it's a carbed motor change to brass floats. I had this problem when I put the 830s on my 454s, changed to the brass floats and the problem went away.
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Old 06-30-2003, 01:00 PM
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Floats set too high in carbs. Otto
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Old 06-30-2003, 01:13 PM
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I had the same problem. When the boat landed the engiine would cut out. It was gradually getting worse to the point that I didn't know if I was going to make it back to port. Turned out the battery cable was working it's self loose. The bumps were just enough to cause the ignition to cut out for a moment. Not saying that some carb slosh wouldn't be the problem-it certainly sounds like you flooded the engine, but maybe my experience is something else to look into.
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Old 06-30-2003, 01:20 PM
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Like they all told you its the floats on the carb!
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Old 06-30-2003, 01:28 PM
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yep, Floats.
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Old 06-30-2003, 01:29 PM
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Sorry, I was in a meeting for the last few hours.

It is carburated, the floats getting stuck was a suggestion at the dock. I did check all electrical connections and they seemed to be good.

This was the first time this has happened since I have owned the boat. 3 years. However it's not the first hard landing. Should I just hold tight to see if problem persist or should I do something now ?
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