Overheat alarm on Evinrude

[THEFERMANATOR]

The restriction sensor only goes off if there is roughly 8-10"s of vacuum present in the fuel supply line. If you pump the primer bulb up to pressure then there will be no vacuum as you'll have pressure instead. The rough running could just be the gas in the carbs has mostly evaporated and left the oil behind. This is common if you let the engine sit for 2 or 3 weeks or longer with fuel left in the carbs. If both of the wires from the fuel sensor are grounded, then it is obviously not connected. Does your horn normally sound for a second when you turn the key on? If so then you have a 3 wire horn. They can malfunction and alarm even though there isn't a request for it to sound.

[bradford]

Originally Posted by THEFERMANATOR

The restriction sensor only goes off if there is roughly 8-10"s of vacuum present in the fuel supply line. If you pump the primer bulb up to pressure then there will be no vacuum as you'll have pressure instead. The rough running could just be the gas in the carbs has mostly evaporated and left the oil behind. This is common if you let the engine sit for 2 or 3 weeks or longer with fuel left in the carbs. If both of the wires from the fuel sensor are grounded, then it is obviously not connected. Does your horn normally sound for a second when you turn the key on? If so then you have a 3 wire horn. They can malfunction and alarm even though there isn't a request for it to sound.

The alarm never sounds on start up so I guess I have a 2 wire? I'll start her up again and report back.

[bradford]

Started up again and let run for several minutes... No alarm, no idle problems, sounds strong as usual. Might be a case of needing to "Jiggle the Handle"

[THEFERMANATOR]

Or just run her some.

[bradford]

Originally Posted by THEFERMANATOR

Or just run her some.

Roger that. I've only taken her out 4 times since February but I usually fire her up in the driveway once a week or so to keep fresh gas in the carbs. Maybe I got a little slack last month.

Tsubaki and Ferm I owe ya'll some beers. Thanks!

[tsubaki]

Hell, I had so much faith that you had it fixed that I went out to eat while you tried it!!!

[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?