Model - E25RERC

I found that this motor has a temp switch that traces back to the power pack. However, I can't find a buzzer or horn of any kind. All the wires that come from the power pack are in use, going to the stator, coils, and ground.

So am I missing something? And if there is no buzzer, what happens when it overheats? Does it short the power pack and shut the engine down? That's my only guess at this point.

The buzzer is usually mounted up near the control box, but may be under the console if you have one.  They are usually a round and black about the diameter of a quarter and about and inch long. 

The temp sensor has no control over the motor, it just closes the contacts when it reaches the temp it's set for to activate the buzzer. 

Now, there is no guarantee someone installed it or hasn't taken it out.

Unplug the temp sensor and ground the wire going to it, with the key switch on and see if you hear it.

 

Just dawned on me, being a 25hp, you might be talking about a tiller motor, so the buzzer should be inside the cowling, if it has one.

 

Well, now we are screwed.  BRP sold off Evinrude and it is no longer in production.  They apparently no longer have the online parts diagrams for all Johnson and Evinrude.  I guess a company called AVS has them now and what they have available is about useless.  I was going to look up your motor and see where they put the buzzer or if it had one, but didn't have any luck.

 

Found them here if you want to go through and see if you can find it.https://www.marineengine.com/parts/johnson-evinrude-parts.php?year=1994&hp=25&model=E25RERC

 

Just did a little searching myself and yours does not have a buzzer.  The buzzer requires 12V to operate.  Your motor is a recoil starter, not electric start so it does not have a 12V source to power the buzzer, therefore it does not have a buzzer.

 

Now, if that concerns you, you can buy a 12V buzzer, mount it in the boat out of the way, add a little two prong plug/connector with one wire connected the block and one to the Temp Sensor with the other end connected to the negative and positive of your TM battery.  Just pay attention to polarity and you can just plug and unplug it if/when you take the motor off.  it's not going to consume any power unless the temp sensor closes and cause the buzzer to alarm.  I would add a small fuse at the battery to protect against possible short.
 

 

Thank you for your input. Been awhile without any answers. So I've looked through every diagram I can find, searched google to no avail, and did a visual search all over the motor. My real question here is what does the temp sensor do when it's activated? It runs straight into the power pack. And let's say I were to retrofit a buzzer, would having it disconnected from the power pack be an issue? I wouldn't think so because under normal operation, it's just a dead end wire. So back to the big question, what does it do when it overheats??

Sorry, I haven't been on here for a few days. 

 

I can't give you an honest I know for a fact answer on a recoil start motor.  I didn't know they even connected it up on those.  However, it makes since they might do something since it can't sound alarm.

It's very possible on that motor they may do something in the power pack to cut or kill performance.

 

One sure fire way to find out.  With the motor running (on a hose or in the lake) unplug the temp sensor end coming from the power pack and short it to the block and see if it has any affect.  That's all it's going to do if it does run hot.   Now, the big motors will go into a limp home mode when the motor will only run about 2000 rpm.  They may do something like that, but the only way you would be able to test that is to see if the motor will make full power with the sensor grounded.  ONLY try that at the lake and in gear, don't try that on a hose.