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Jan 23rd, 2013
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overheat alarm #10637415 02/22/15 06:27 PM
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smooth move Offline OP
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02-200 hpdi. temp alarm goes off every now and then and i've got 15-20 lb on the gauge and peeing good. impeller is 4-5 yrs old, but pressure is great, sooooo------? first time it went off i thought it was a low oil alarm, but got plenty oil. next time i looked at the gauge and the temp indicator is blinking. let it sit 4-5 min and everything is fine. this motor is driving me crazy. i've got 995 hrs on it and never had a mechanical problem, but the fuel problems are leg
endary. now temp problems---aaaarrrggghhh! i did catch a couple reds and a flounder though!

Last edited by smooth move; 02/22/15 06:30 PM.

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Re: overheat alarm [Re: smooth move] #10638402 02/23/15 01:07 AM
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gary purdy Offline
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That's too long on an impeller. I would do a complete cooling system service including poppet assembly, thermostats and complete water pump.


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
Re: overheat alarm [Re: smooth move] #10638694 02/23/15 02:28 AM
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smooth move Offline OP
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why would the impeller be bad if i'm getting 20 psi?


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Re: overheat alarm [Re: gary purdy] #10638772 02/23/15 02:52 AM
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Originally Posted By: gary purdy
That's too long on an impeller. I would do a complete cooling system service including poppet assembly, thermostats and complete water pump.


I agree with this...it's a good thing to do anyway for preventive maintenance & peace of mind. Sometimes small pieces of the impeller break off and restrict the cooling passage. Don't ask me to tell you how I know.

Re: overheat alarm [Re: smooth move] #10639573 02/23/15 03:31 PM
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gary purdy Offline
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Question is how much pressure do you have with a new water pump? Should be close to 30psi at WOT. Is your water pressure gauge right?


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
Re: overheat alarm [Re: smooth move] #10639626 02/23/15 03:47 PM
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smooth move Offline OP
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Gary, i've been rearranging the wiring in the console and i rerouted the water pressure line. before that i always had 25-30 lb at close to WOT. afterwards, it was 15-20. i assumed that when i cut the line and shortened it, i left about 1/8" sticking out of the ferrel at the guage, that it was a little compressed and not showing as high as before. hard to believe the water pressure would change overnight.
today, if the weather allows, i'll take the boat out of the water and replace the pump and both thermostats and check the temp sensor. after all the work i've done to the boat this winter, it's killin me that now i'm hav ing these problems. thanks for you help.
after some more research, looks like i might as well do the poppit valve also.

Last edited by smooth move; 02/23/15 10:32 PM.

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Re: overheat alarm [Re: smooth move] #10640153 02/23/15 06:14 PM
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More than likely the pressure relief valve "poppit" is stuck open not allowing water to get to the top end where the thermostats are, went through the same thing with mine last year. But would be a good idea to flushed and impeller replaced.

Re: overheat alarm [Re: gary purdy] #10641085 02/23/15 10:43 PM
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Originally Posted By: gary purdy
Question is how much pressure do you have with a new water pump? Should be close to 30psi at WOT. Is your water pressure gauge right?


This.

You should be running around 30-35 psi. You better change that pump before your next trip or you will be replacing the motor soon. 15-20 is way to low.




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Re: overheat alarm [Re: smooth move] #10653013 02/27/15 06:05 PM
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I change my impeller every two years! Cheap fix/insurance. thumb

Re: overheat alarm [Re: smooth move] #10654436 02/28/15 02:08 AM
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smooth move Offline OP
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WOW.----waiting on weather.


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