Optimax High RPM Overheating

[Salty Dog]

Twin 2001 Opti 150. Ser # OT274461 and OT274141




I pulled a friends boat off of a sandbar and loaded up my engines with crud.




I did the complete water pump and t-stats. I went to change the poppet valve and someone had removed it so I left it out. In the process I tried to remove the grommet and I fell into the block I hope that isn't the cause of my problem.




I also cleaned the strainer but I'm thinking I should do it again just in case and stick a shop vac into the hole. The water pressure is much higher than the starboard engine so something is restricted for sure.




I have the Smartcraft gauges and the analog also. The temp of the Smartcraft stays cool but the analog will hit the red and sound the alarm.








Any ideas guys?

[XstreamVking]

The smart craft gives the compressor temp. Your other sender is giving the real head temp. You need the poppit valve, install one. Pull the strainer and run the motor at idle to flush the crud out, then re-install the strainer.

[Salty Dog]

Thanks,

I flushed everything out and it seems good and ill test run it tomorrow. The poppet valve is in and I removed the plugs and ran the hose up to the top of the block where it belongs. I think my engine has the sensors backwards as the compressor goes to the analog gauge.

Has anyone seen a bare block from the bottom to see if the poppet grommet will get washed through or get stuck?

[Salty Dog]

She's running cool at high rpm but has low psi at idle. Should I remove the pressure relief hose and put the plugs back in?

i read somewhere that the hose should be restricted down to 1/8". Anyone heard of this?

[merctech5591]

I would not remove the hose. I would add the plug and start with a 1/8 " hole and work up from there..

[Salty Dog]

On the engine where the hose is gone can I use a piece of 1/8" fuel line?

[Mr. Demeanor]

Clean the strainer for the compressor cooling line:
http://www.screamandfly.com/showthre...water-strainer