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140 looper warning horn

T

Trollineye

New member
Hope Joe Reeves sees this, if not anyone else who can help would be appreciated. I rebuilt my 1986 140 looper and when I connected the main harness and conectors back together, I crossed the trim sending unit to the VRO pump connector (they are the same). Noticed the trim gauge wasn't working and discovered the problem with the connectors and fixed the trim gauge. Now the warning horn goes off when I ground the over heat thermoswitch but doesn't sound when I turn the ignition on like it used to. Is there a circuit board in the oil tank I may have destroyed? I can't find a schematic for the entire horn circuit. I also set the timing the way Joe suggested by removing the plugs, timer base against the stop (full throttle) and cranked her over. My air box cover and manual calls for 18 degrees BTC. It was at 4 degrees and I cranked it out to 14. Hard to believe it was that far off. Did I miss something or disturb something in the rebuild? Thanks all. Bob

Joe, BTW I fired her up last night and she sounds great. Has a total of 3 minutes running and will be in the water tomorrow to get through the breakin period.
 
The warning horn that beeps momentarily when the key is turned to the ON position would be a plastic horn that has a built in black ground wire. The TAN wire must be connected to the terminal nearest that black ground wire otherwise weird things will happen.

If wired correctly AND the ground wire is present, good condition, and grounded, and still does not beep when the key is turned to the ON position, I would assume that the horn is faulty.

Thousands of parts in my remaining stock. Not able to list them all. Let me know what you need and I'll look it up for you. Visit my eBay store at:

http://stores.ebay.com/Evinrude-Johnson-Outboard-Parts-etc?refid=store
 
Thanks for the reply Joe. I don't think the horn is faulty because I can ground the over temp thermos and the horn works. My concern is that the VRO system (low oil/ no oil) may not work. When I hooked the trim gauge sensor to the connector for the VRO tank, I think it put a voltage to the VRO tank board. There is a warning on the cable to the VRO tank that says "do not hook to batttery or damage may result". I think I damaged the VRO board in the tank. Is there a schematic available anywhere for the VRO tank and wiring? The horn is wired correctly.
 
The signal from the components (overheat grounded out, etc) is a separate circuit from the automatic short beep when the key is turned to the ON position. If the horn doesn't beep when the key is turned to the ON position, something is wrong.
 
Thanks Joe,

I think it's fine. When I turn the key to "on" the first time, it beeps. Turn it off and back on (without starting) and no beep. Does this sound correct? Where is that short beep coming from? I bought a head from you a monthg or so ago. Finally got her back together and I'm working on breaking in now. Here is a video from Friday 5/21. Has almost 2 hours on it and the lightning chased us away. Going back out today for hopefully 8 more hours.

http://www.youtube.com/watch?v=UdCsvZuGLsI
 
Strange that the horn would beep the first time and not after that..... never encounterd that problem.

However, that type warning horn is elecronic, not electric as we would think of the old style electric horns.

The beep when the key is turned to the ON position is related to the circuitry within the horn and resets when it is turned to the OFF position. That initial momentary beep has no connection with any external sensor but is rather created internally.

One thing that you might look at is the ground condition of that built in black wire. Possibly the wire is faulty, has a dirty connection, or is not grounded properly. It must be grounded directly to a terminal (or some sort of ground) that is connected directly to the negative terminal of the battery.

It (the ground wire) MUST NOT BE conncted to some component in some manner that would have voltage supplied to it and then going to ground. And it MUST ABSOLUTELY NOT BE connected to the Black/Yellow wire terminal of the ignition switch.

Glad you have your engine running and that the cyl head worked out for you. Let us know what you find with that horn.
 
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