500 EFI Running hot
#1
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Location: Alexandria, VA
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500 EFI Running hot
I just bought this boat with about 200 hours on it. Impeller was replaced before i bought it and i just put a thermostat in. Normally runs between 150-180 but sometimes will hit 220! I am planning on replacing impeller and backflushing the lines. Any other suggestions?
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Also look to see if the circ water pump is leaking or not, That would make it run hot. Do you think the warning horn is working? it should beep at key up to let you know it works some times.
Last edited by Boat Tech; 06-07-2009 at 03:22 AM.
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When people talk about overheating and can't find the cause, I wonder
why no one ever mentions cleaning out the oil cooler? In fact, cleaning
out the seawater section of the oil cooler is shown as a yearly maintenance item in my 575SCi owners manual (it's the same cooler that is used on the 500EFI). You have to take them off and rod out the water section. Get all
the little tiny stones and various clogs out.
Several times over the years I've sucked sufficient sand to clog them enough to have high temps. And these are stone sizes that can make it
past many sea strainers.
Pesky Varmint
why no one ever mentions cleaning out the oil cooler? In fact, cleaning
out the seawater section of the oil cooler is shown as a yearly maintenance item in my 575SCi owners manual (it's the same cooler that is used on the 500EFI). You have to take them off and rod out the water section. Get all
the little tiny stones and various clogs out.
Several times over the years I've sucked sufficient sand to clog them enough to have high temps. And these are stone sizes that can make it
past many sea strainers.
Pesky Varmint