Overheat alarm on Evinrude

bradford · #1 08-19-2008, 04:06 PM

Ferm, on the fuel restriction sensor, I should just disconnect the black wires?

THEFERMANATOR · #2 08-19-2008, 04:08 PM

Quote:

Originally Posted by bradford

Ferm, on the fuel restriction sensor, I should just disconnect the black wires?

One of them will hook to a ground wire, and the other should have a bullet connector on it. Unhooking either of them will take it out of the loop. Which style horn do you have now, 2 or 3 wire?

bradford · #3 08-19-2008, 04:20 PM

Quote:

Originally Posted by THEFERMANATOR

One of them will hook to a ground wire, and the other should have a bullet connector on it. Unhooking either of them will take it out of the loop. Which style horn do you have now, 2 or 3 wire?

Both the black wires are grounded to the fuel pump mount. I pumped my primer bulb and felt some resistance and then the resistance gave way. I fired her up and got no alarm at all. I reconnected the temp sensors and still no alarm. This doesn't make sense though if the fuel restriction sensor isn't connected to anything. Starting to think some crud in the fuel line to cause the rough idling, but dumbfounded on the alarm.

tsubaki · #4 08-19-2008, 04:23 PM

It sounds like the fuel sensor is connected and working and you did have a restriction and this would account for the rough running.

THEFERMANATOR · #5 08-19-2008, 04:30 PM

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 · #6 08-19-2008, 04:34 PM

Quote:

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 · #7 08-19-2008, 04:43 PM

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"

bradford · #8 08-19-2008, 04:22 PM

Quote:

Originally Posted by THEFERMANATOR

One of them will hook to a ground wire, and the other should have a bullet connector on it. Unhooking either of them will take it out of the loop. Which style horn do you have now, 2 or 3 wire?

I guess i need to pull the cover off the control box to find that out?