over heat alarm on 1988 125 force

[Todd runge]

Will the alarm go off if the wire comes loose?

 

[jerryjerry05]

No.
​It needs to ground out to sound off.
​Test it: key on then ground the orange lead to the block.
That should make the buzzer sound off.
That motors 29 I imagine the buzzer is too.
​It can be replaced with a car or motorcycle horn.
Just make sure the wires are hooked up right.
They can be mounted backwards and not work.

 

[jerryjerry05]

Just read the post you added to a closed one.
The alarm going off probably means it's running hot.
​Test it.

 

[Todd runge]

it went off 30 seconds after start up then shut off and came on randomly for and hour or so water that was coming out was hot but not real hot

 

[Jiggz]

When was the last time you replaced the water impeller?

 

[Todd runge]

just bought it from a dealeer in iowa he said he just went through it

 

[Todd runge]

No Title

this is what is making the noise

 

[Jiggz]

Well, that is the buzzer that is activated by the sensor (with orange wire) mounted on the motor's head. I would recommend replacing the impeller first and then go from there.

 

[jerryjerry05]

No Title

You bought a USED boat from a USED boat dealer and you trust him??
​The impeller, pull the drive and check it.
Or take it back to the dealer and tell him it's overheating.

​The sending unit on the motor, is it in right? Is it still in good shape?
​With a meter you can test the sender in a pan of water on a stove.

​One of my tools is a temp gun. Under$20 Amazon.
This tells me if it's really getting hot and where.

The pics are from a motor that was pumping water and the alarm was going off.
​The heat gun found the hot spots

 

[Todd runge]

ok will do thanks for all your help! and the pictures too.