70 hp Evinrude

[Cavalier]

I have a 70 hp 1974 Evinrude which is running too cold have just replaced the thermostat today and have run in tank but still seems too cold any thoughts.

 

[Dhadley]

Re: 70 hp Evinrude

What is it doing? Or not doing that makes you think it's too cold? We need a little more info please.<br /><br />Good luck!

 

[Cavalier]

Re: 70 hp Evinrude

Hi Dhadley<br />After roaring round the lake for 20min or so <br />and removing the cover and touching the head of the motor it is only cool to luke warm, it<br />also foul the plugs ie wet with oil not dry as they should be.<br />cheers Pest

 

[G DANE]

Re: 70 hp Evinrude

Hi Pest<br /><br />Did you check if the spring and rubber sleeve was in place on the thermostat. If they arnt, thermostat will not clouse water off. The temperature should be around 50 degree celsius, you can actually hold your hand on top op powerhead, even after WOT run.

 

[Cavalier]

Re: 70 hp Evinrude

The thermostat on this motor has a rubber washer underneath & is held in place by the housing gasket and housing.I am going to the lake this weekend so will see how it goes and report back<br />Thanks Pest

 

[Dhadley]

Re: 70 hp Evinrude

What spark plugs are you using?<br /><br />Good luck!

 

[petryshyn]

Re: 70 hp Evinrude

Did you service the pressure relief valve? If you did, be sure all the pieces are installed. If this baby is allowing bypass all the time........>cool engine.<br /><br />just a thought.....