Over Heating Alarm

[Darol Wester]

Was just out fishing and broke a fan belt, but hadn't noticed due to lots of commotion in the boat. It got fairly hot but recovered fine. My question is, do they have a decent over heating alarm out there that does it's job well? My gage works fine, but you're not always paying attention to it and the results could have been a lot worse.

What would you recommend?

 

[Don S]

Re: Over Heating Alarm

There are companies selling systems for that, or you could build your own. What are we working on, you may have most of the wiring already there.

 

[Darol Wester]

Re: Over Heating Alarm

It's a 1978 23 ft. Cruiser with a Chevy 350/Mercruiser I/O.

 

[Bondo]

Re: Over Heating Alarm

It's a 1978 23 ft. Cruiser with a Chevy 350/Mercruiser I/O.

Ayuh,... Too Old I believe...

You'll need to add a temp Switch, as close to the temp Sender as ya can...
Then run Power through the buzzer of yer choice, 'n Ground it through yer new Switch...

 

[cj7ole]

Re: Over Heating Alarm

I just installed one in my '89 5.7 Mercruiser IB ski boat. IBOATS.COM part number 12-M40177BP, includes the oil and temp switch and the buzzer. Simple install electrically. I had a spare temp plug near the thermostat but I needed to buy a tee and nipple to parallel the oil sender. Cole Hersee Co. brand. Using the oil low pressure switch is optional, but think about what happens with no oil pressure.

Yea, my son overheated mine when the impeller went south and I am still trying to get everything working right almost 2 years later. Blew a head gasket.

 

[Darol Wester]

Re: Over Heating Alarm

Ayuh,... Too Old I believe...

You'll need to add a temp Switch, as close to the temp Sender as ya can...
Then run Power through the buzzer of yer choice, 'n Ground it through yer new Switch...

Any particular switch the best or just one from the parts store? Would this switch be cut in to the existing line that already exist there or a line of it's own? Does the switch have a rheostat or do you buy one that has a setting for where you want the buzzer to go off?

I'm just trying to picture this in my little head.

 

[Bondo]

Re: Over Heating Alarm

Any particular switch the best or just one from the parts store? Would this switch be cut in to the existing line that already exist there or a line of it's own? Does the switch have a rheostat or do you buy one that has a setting for where you want the buzzer to go off?

I'm just trying to picture this in my little head.

Ayuh,... A temp Switch will look sorta like the Sender, usually smaller...
It's normally open, til the Temp is hit, then it'll close, sounding/ grounding yer buzzer...

All fresh wiring,... Yer's is to old to have it stock...

 

[cj7ole]

Re: Over Heating Alarm

This is what I installed yesterday, (see post #5).

http://www.iboats.com/Cole-Hersee-M...441015826--**********.516052209--view_id.3876

Warning Buzzer Features:
Warning buzzer (#4099) sounds when oil pressure is too low or engine coolant temperature is too high.
Buzzer has plated steel case and moisture repellent insulator.
For 12V DC electrical systems.
Oil pressure switch operates at 2 to 6 psi, temperature switch operates at 200?F(?10?F).
Use with inboard and I/O engines.
Installation instructions included. Engine Warning Kit W/Buzzer 5 - Cole Hersee
Part # M40177BP
I/B & I/O ENGINE WARNING KIT. MARINE ENGINE WARNING KIT Includes warning buzzer, oil pressure switch and temperature switch. Switches continually monitor engine oil pressure and engine coolant temperature. Buzzer sounds when overheating and/or oil loss conditions occur. Oil pressure switch operates at 3 to 7 psi. Temperature switch operates at 200degF. Installation instructions included. For inboard and I/O applications. For use with 12 volt, DC electrical systems