70HP evinrude VRO2 alarm

[livewirei]

i have a 70hp evinrude vro2, as soon as i turn the key to start there is a constant beeeeeeeeeeeeeeeeepp, does not go away, engine runs and it cold...the oil tank sensor is disconected, would that cause it?( the tank plug and plug on the engine do not match up, will take pics tomorw)

 

[emdsapmgr]

Re: 70HP evinrude VRO2 alarm

A constant horn normally signals an overheat. The overheat switch may be shorted internally. To test: pull the wire's knife connector apart. It's under the rubber sleeve right by the switch. If the horn stops, replace the switch in the head. Also possible there is a problem with the horn. You did not mention the year. The newer ones (early 90's) have horns which will beep for a few seconds every time the key is turned to on.

 

[boobie]

Re: 70HP evinrude VRO2 alarm

You could also have a tan wire grounded in the system somewhere.

 

[livewirei]

Re: 70HP evinrude VRO2 alarm



is the thermostat the piece above the sparkplug? and should i be concerned with the missing bolt?

 

[racerone]

Re: 70HP evinrude VRO2 alarm

Missing bolt ???----That may be a location for a temperature sending unit.

 

[livewirei]

Re: 70HP evinrude VRO2 alarm

sorry im pretty new at this.. its a 1991, where is the "overheat switch" located?
isnt the tempurate sending unit located on the other side with the tan wire coming out of it?

 

[WernerF]

Re: 70HP evinrude VRO2 alarm

The brown/blue wire on the head's port side goes to the overheat switch. Disconnect it and see what happens to your beep problem.
A temperature sending unit is an optional thing for a temperature gauge in the dashboard.

 

[livewirei]

Re: 70HP evinrude VRO2 alarm

ok, so the port side tan wire is what would set off my overheat alarm, and my actually thermostat would be under the panel with 4 bolts in the middle?

 

[racerone]

Re: 70HP evinrude VRO2 alarm

Overheat switch and TEMPERATURE sending unit are 2 different items !!---Thermostat / poppit valve are under the cover with 4 bolts.

 

[livewirei]

Re: 70HP evinrude VRO2 alarm

so if i unplug the tan wire and it stop the alarm, i should replcae the overheat switch and problably replace the thermostat too?

 

[emdsapmgr]

Re: 70HP evinrude VRO2 alarm

On your engine it may be easier. Looks like the temp switch is held in with a single retainer/screw. You should be able to unscrew it and remove the temp switch, effectively removing it's ground. Once that is done turn the key to on and see what happens. If the horn is silent, replace that overheat switch only. The thermostat is probably not be part of the problem.