Overheat alarm on Evinrude

[THEFERMANATOR]

These pictures should be of the same set-up as yours as I have a 90 powerhead and early style harness. If you disconnect these 3 sensors and it still goes off you probably have a harness problem. There is also a chance that the self test portion of your hot horn has failed and stuck on. You can get a test light and connect the ground clamp to a 12V+ source and probe the brown hot horn wire and see if the light lights up. If it does then you probably have a harness problem. Also try unhooking the brown wire from your horn while leaving the key on and black ground connected. If the horn sounds it's defective, if not then your getting a ground in the harness. It doesn't take much to set the self test style horns off.

Here is the starboard overheat sensor.


Here is the port overheat, the one that hooks to the brown wire is the overheat and the white and black goes to the power pack.


And here is the fuel restriction sensor, you can also see the VRO amphenol in this one just to the right of the starter.

[BigAl331]

Originally Posted by THEFERMANATOR

And here is the fuel restriction sensor, you can also see the VRO amphenol in this one just to the right of the starter.

Sorry to bring up an old thread but I was hoping it would help me out. Instead it has raised another question that I hope you guys can help me with.

When at full throttle I get a buzzer that seems to be fuel related. If I slow down to about 1/2 throttle or less the buzzer will go away. The last time I took the boat out and the buzzer went off I immediatly went back and felt the collant discharge from the motor. It was the same temp as the surrounding water, so I'm assuming that it's not heat related.

Now to my question, is the fuel restriction sensor located somewhere other than the motor? I just looked all over the motor for a sensor that looks like the one above and couldn't find anything.

Fuel line comes in to the fuel pumps (straight to the upper pump). Then to the lower and on to the carbs. I don't see anything that looks like it would be picking up a vacuum from the fuel line. The is nothing in the incoming fuel system that has two wires coming out of them but the start/choke solenoid.

Any suggestions?

[THEFERMANATOR]

The restriction sensor is on the 86+ 200+ loopers and a few of the late model 150/175's. Older pre-VRO engines didn't have them.

[BigAl331]

Any reason why the buzzer keeps going off if it isn't overheating and there is no fuel restricted sensor?

[Skools Out]

well first off how is it going off? those buzzers have codes as to how they beep, is it solid or a long or short or both long short buzz?

[BigAl331]

It is constant. When it comes on I throttle back and I have felt the water coming out. It doesn't seem hot, same temp as surrounding water.

[THEFERMANATOR]

This is on the 82 150 you posted about in other posts? If so the only warning on it should be overheat.