warning alarm

[paapa2]

I am posting this for my father, he has a 1990 28 horsepower Evinrude,he has got a warning alarm that sounds after approx.5mins.of running at medium throttle,it is pushing a 24 foot pontoon boat.I am an auto tech and am not familiar with the setup on this motor.It has a temp sensor in the head and the best I can tell it is either opened or closed.When the alarm sounds it runs terrible.Does it have a t-stat or how can I check this? Sorry I am new to this,Thanks for taking time to read this.Paapa2 </font></li><br />[*]<font size="2" face="Verdana, Arial"> bernardryan984@aol.com

 

[50horce_force]

Re: warning alarm

yea just take the t-stat out it will run cooler. Better. then change head gasket and water pump

 

[paapa2]

Re: warning alarm

50horce force ,thanx,but where is the stat at?andcould it be a waterpump problem even though it runs cool to the tttttttouch at the head?

 

[mrc]

Re: warning alarm

I really wouldn't recommend removing the thermostat,<br />see thread on thermostat stuck open for a good reason why. If you want to find out if it is really <br />overheating, check it with thermo meter should be<br />140-165 (in general, not sure on your specific motor)<br /><br />Radio shack sells a nice little infra'd digital<br />thermometer for about 30$, simply point it at the<br />head and push a button, instantly reads temp on <br />a digital display.<br /><br />Is your motor VRO? Could the alarm be a VRO alarm?<br /><br />Mike

 

[paapa2]

Re: warning alarm

merc3,I have a raytech infra red but did not bring it with me,435 miles away,If I go through the trouble of taking stat out I am going to put a new one in....but where is it?

 

[50horce_force]

Re: warning alarm

should be a 9/16 bolt on the block

 

[paapa2]

Re: warning alarm

50horce force,9/16 ths.bolt is a t-stat?oh yea its not vro.