Engine Overheats When Idling

[tperk100]

When idling (trolling) my engine's over heat alarm is frequently sounding. If I put it in neutral and rev it up a bit, the alarm goes off...and I can go back to trolling for another 15 minutes or so. Engine runs just fine at higher RPMs.

Any idea of what might be causing this?

Thanks

 

[Inducted]

Re: Engine Overheats When Idling

Maybe pressure relief valve.

 

[tperk100]

Re: Engine Overheats When Idling

What is this valve?

Thanks

 

[Inducted]

Re: Engine Overheats When Idling

It is the poppit valve. Back side of the block usually lower stbd. corner. Should be two bolts securing the flange,hose also is connected to flange.

 

[tperk100]

Re: Engine Overheats When Idling

What is this valve supposed to do?

Can it be repaired or will I have to replace it or what?

Thanks

 

[Inducted]

Re: Engine Overheats When Idling

Needs to be replaced. Poppit valve,grommet, spring, and gasket. It is a pretty straight forward remove and replace. Do a search for poppit vaive and you should find some good advice, Be careful not to let the grommet fall into the opening. Good luck

 

[tperk100]

Re: Engine Overheats When Idling

Inducted,

Thanks for your help. Looked at valve, spring etc. Looked OK and dealer did not stock it so I did not replace it. Put pump kit in and new thermostats. Problem solved.