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Forum: Engines and Propulsion Systems

06-07-2017, 18:01

Replies: 21

3YM30 coolant buzzer going off, but engine not overheating

Views: 6,413

Posted By Wotname

Re: 3YM30 coolant buzzer going off, but engine not overheating

Good points but presumably issues with the sail drive wiring terminals would not cause water temperature gauge to read high.

I am speculating the water temperature gauge is an after market...

Forum: Engines and Propulsion Systems

06-07-2017, 14:51

Replies: 21

3YM30 coolant buzzer going off, but engine not overheating

Views: 6,413

Posted By Wotname

Re: 3YM30 coolant buzzer going off, but engine not overheating

Further to this, I just checked the service manual which states the coolant alarm sensor is set at 93 to 97 C and engine thermostat is fully open at 85 C.

So 120 C is way high.

The boiling...

Forum: Engines and Propulsion Systems

06-07-2017, 14:23

Replies: 21

3YM30 coolant buzzer going off, but engine not overheating

Views: 6,413

Posted By Wotname

Re: 3YM30 coolant buzzer going off, but engine not overheating

It is supposed to sound continuously (and loud).

The overheat alarm sensor is just a switch whose contacts are made when it overtemps. It uses the same "buzzer" as the low oil pressure alarm so it...

Forum: Engines and Propulsion Systems

06-07-2017, 14:01

Replies: 21

3YM30 coolant buzzer going off, but engine not overheating

Views: 6,413

Posted By Wotname

Re: 3YM30 coolant buzzer going off, but engine not overheating

I reckon you would know if it had seized :smile:
As for damage, I can't say for sure as I have never tried it. 120C is awful hot for these engines but what does it normally run at. If it ran at say...

Forum: Engines and Propulsion Systems

06-07-2017, 04:35

Replies: 21

3YM30 coolant buzzer going off, but engine not overheating

Views: 6,413

Posted By Wotname

Re: 3YM30 coolant buzzer going off, but engine not overheating

For the OP.

I don't know exactly how your temperature gauge and over temperature alarm is wired but most 3YM30 engines (that have a temperature gauge fitted) have two separate senders. One for the...

Forum: Engines and Propulsion Systems

06-07-2017, 04:17

Replies: 21

3YM30 coolant buzzer going off, but engine not overheating

Views: 6,413

Posted By Wotname

Re: 3YM30 coolant buzzer going off, but engine not overheating

Crikey Gord, those engines run hot :)

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