1989 OMC Cobra 2.3 engine Help Question please.

[playtime320]

I have an 1989 2.3 engine cobra. Lower unit water pump was just replaced along with the t-stat. Pump was melted. Took it to the water and let it warm up and it was running about 170-180 on temp gauge. Took boat for a test ride and at higher RPM's it overheats. Bring engine it back to idle and it cools down to 180 again. HELP !!!!
I know it is possible to have rubber from pump plug something but could someone please help me out. If you think it is clogged where would I look first. I was told I could leave out the flapper valve also is this correct ???? I have already spent a ton on this problem and need to fix it myself this time due to lack of more funds and tired of getting ripped off.
Thanks in advance all.

 

[89 Capri 2.3l]

Re: 1989 OMC Cobra 2.3 engine Help Question please.

I was reading other forums and found one on running a 140 degree thermostat for stopping run-on after shutting the boat down. It seems like this would keep it running cooler at higher RPMs. Might be worth a try and not too expensive.

 

[manny526]

Re: 1989 OMC Cobra 2.3 engine Help Question please.

I have a 2.3 on my 1990 bay liner.I hope this helps.I taught I had an over heating proble on my boat too. At high rpm the temp went up fast.I replace the inpeller pump and it didnt help,.I check my water pump and it was like new.My problem was my temp gage.I replace with one from auto zone and problem solve.let me know

 

[sea wolf]

Re: 1989 OMC Cobra 2.3 engine Help Question please.

I have an 1989 2.3 engine cobra. Lower unit water pump was just replaced along with the t-stat. Pump was melted. Took it to the water and let it warm up and it was running about 170-180 on temp gauge. Took boat for a test ride and at higher RPM's it overheats. Bring engine it back to idle and it cools down to 180 again. HELP !!!!
I know it is possible to have rubber from pump plug something but could someone please help me out. If you think it is clogged where would I look first. I was told I could leave out the flapper valve also is this correct ???? I have already spent a ton on this problem and need to fix it myself this time due to lack of more funds and tired of getting ripped off.
Thanks in advance all.

Pull the hose to the t-stat & see if it's clogged. I'm assuming u changed the impeller?