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Problem with HP575

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Old 07-15-2003, 01:51 PM
  #11
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maybe spark plug wire arcing against block or bracket


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Old 10-01-2003, 11:58 AM
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Hey Steve...
I had the same problem a couple yrs. ago while on a Poker Run in Florida. It was a fuel pump just starting to go bad. It was on again and off again and drove me nuts -- EVERYONE told me how bad it sounded. We diagnosed it and I had a new pump on in an hour. They're pretty easy to replace. Not sure if this is it, but if everything else fails, here's something else to try. Hope it helps!
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Old 10-01-2003, 03:17 PM
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scarabfan

Your original post was from a few months ago. Did anything else happen to your motor?
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Old 10-01-2003, 04:09 PM
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No, it has not had the same problem since. It was an extremely hot day, and I was running it hard in a Poker Run. The dealer said the heat probably caused a vapor lock in the fuel line. The motors have been running perfect, I have 125 hours on them. They are big-time gas guzzlers though! I would get 525's if I had to do it over! Thanks...
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Old 10-02-2003, 07:55 AM
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From what I understand the 525's work better in the warm climates. We don't have that problem often here.

As a precaution you probably should change your head gaskets. I just lost one on my starboard side. The owner of the boat before me lost a fuel pump and I think that may have damaged them.

Yes they do like gas and if they don't get enough, they get mad and break something.
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Old 10-02-2003, 10:42 AM
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There was a fuel rail recall on those motors...if they haven't been changed out that could be a contributing factor. Resonance in the fuel lines themselves could cause disruption of flow to the injectors.

I run the 575's and changed out gear ratio's to run a more efficient prop and fuel economy increased dramatically (now I stop at every OTHER gas station...)
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