Whaler Central - Boston Whaler Boat Information and Photos

Posted by Schwarke on 07/21/09 - 1:51 PM

I have a nice whaler that I purchased to work on in my spare time. This existing issue is driveing me over the deep end. I can run the boat for about 15-20 minutes and then the solid tone warning horn goes off which is an indicater of overheating. I have read several forums and I have checked compression, flushed the entire water circulation system and seam to have good water flow. In addition to replacing the thermostates and temp switches. As the VRO's are problematic I have also startede mixing the oil in the tank. The VRO is still hooked up and seams to be injecting oil.

I would aprecaite any input that may help me to resolve this issue.

Posted by Joe Kriz on 07/21/09 - 2:05 PM

How are you sure this engine is overheating?

Temperature gauge reading hot?
Can't touch the engine because it is too hot?
or is it just the horn that is sounding?

Have you read this article?
http://www.whalercentral.com/articles...ticle_id=9

Other malfunctions can cause the horn to sound steady.
I once had a short in the sending unit at the bottom of my VRO tank. The horn sounded steady so I thought the engine was overheating. Finally, by disconnecting the tan wire from the VRO tank, the horn stopped. I replaced the VRO tank assembly with a brand new one.
I am not saying this is your problem but we need to find out which tan wire is making the horn sound steady.

Once you determine which tan wire(s) is causing the horn sounding off, then you will be able to determine if the engine is actually overheating or if it is something else. Unless of course you already are positive the engine is overheating. Let us know how you determine this...

Posted by Schwarke on 07/21/09 - 5:32 PM

theo wrote:
That was exactly my thought too - several sensors connected to the horn. Could be overheat, but could also be low oil, or low water pressure, or . . .

Thanks for thew replies ab ove! I am not sure if it is over heating or not. My plan is to take it out this eveniong and use a lazer temp gun on it but storms have moved through the twin cities, guess it will wait until tomorrow.
Ken

Posted by Schwarke on 07/21/09 - 5:36 PM

Joe Kriz wrote:
How are you sure this engine is overheating?

Temperature gauge reading hot?
Can't touch the engine because it is too hot?
or is it just the horn that is sounding?

Have you read this article?
http://www.whalercentral.com/articles...ticle_id=9

Other malfunctions can cause the horn to sound steady.
I once had a short in the sending unit at the bottom of my VRO tank. The horn sounded steady so I thought the engine was overheating. Finally, by disconnecting the tan wire from the VRO tank, the horn stopped. I replaced the VRO tank assembly with a brand new one.
I am not saying this is your problem but we need to find out which tan wire is making the horn sound steady.

Once you determine which tan wire(s) is causing the horn sounding off, then you will be able to determine if the engine is actually overheating or if it is something else. Unless of course you already are positive the engine is overheating. Let us know how you determine this...

Thanks for the advise, since I have started working on this boat, I have started to second guess myself. I like the tan wire theroy and will test this as soon as I can. also thanks for the article
Ken

Posted by Joe Kriz on 07/21/09 - 5:37 PM

It could be a faulty horn or many other things.

Could be one of the tan wires is grounding out somewhere on the engine or in the harness....

You're right. You need to determine whether the engine is actually overheating or not. Once you find that out we can go from there.