overheat alarm

[takidd4597]

I have a 1988 Mariner. It is a 3 cylinder. I have been getting and alram on my throttle control. It did it one day when I was trimmed down and when I trimmed up it went off. Today while we were out I was having a problem with water in the gas and the entire time the alarm was going off. Could not get on plane until I worked the water out of the carbs and line. The motor was just worked on and they put a new head gasket on.. Supposedly for the same reason. I have a stream of water comming out like a garden hose. I can keep my hand in the stream of water. There is no way this water is over 120 degrees. This is a 60 hp Mariner 1988.<br /><br />I have one wire next to the top cylinder with an very small thin nut. I mean it is very very close to the top spark plug. They told me the impeller was replaced as was a new head gasket.<br /><br />Is there a certain temp the pee water should be to tell if it truekly is overheating?<br /><br />Help please. <br /><br />Can anyone tell me what could be causing this alarm and why and what I can do to fix it?

 

[DJ]

Re: overheat alarm

takid,<br /><br />After warmup, touch the top cyliner head with your hand. You should be able to hold it there for a few seconds.<br /><br />You need to find out why that alarm is going off. It's telling you something.

 

[boatingfool]

Re: overheat alarm

I havent heard anything about the thermostst.<br /><br />How long is it running before the alarm goes off?<br /><br />If the thermostat isnt opening then the water wont circulate the block so it the water coming out wount be that warm.<br /><br />I would not run that engine again until you narrow it down.<br /><br />I had a similar problem in my engine (temp alarm only) but when I brought the throttle back to idle the alarm would stop.<br />It was the thermostat.

 

[Trent]

Re: overheat alarm

Is this oil injected? If so, Is the alarm on all the time or is it beeping? Beeping is oil alarm. On all the time is overheat.

 

[hondon]

Re: overheat alarm

You do not have a head gasket on this engine.It would be interesting to know how that dealer justified changing it.

 

[ob]

Re: overheat alarm

Trent makes good point.Insure that what you are hearing is in fact the high temp alarm.If you have determined that it is actually a high temp alarm since you mention that it occurs when motor is trimmed it leads me to think that you possibly have a problem in the wiring of the alarm circuit that is affected by the movement or bending of the wire harness.<br />Hondon also touches on a point of interest in regards to the head gasket.