Johnson 50hp 1995 - constant beep at power up

[zainka]

Hi. I have an issue with the alarm sounding constantly when turning on ignition and also after starting the engine. The engine runs smothly and there is a stedy flow if cooling water frome the hose. since it just startedit cant be overheating issue.

I Know steady beep could also mean restricted fuel flow, but the VRO is entierly replaced with a diaphragma pump after lots of problem with it. The VRO electric connections are left open. After the replacement I had no problems for a long time, but as an electronic enginear i fear that the VRO connector actually should be terminated somehow for fixed signal level. I dont have the electric schematic but wonder if an open circuit could fool the engine to thibk it have fuel issues.

As mentioned earlier, the engine runs just fine, also at high rpm an it does not run hot even after a few testruns

The only way to stoo the alarm is to slightly turning ignition key towards stop position, but not entirely. However, i guess that just removes power to the sounder.

 

[racerone]

Maybe the horn itself is defective.

 

[clemsonfor]

Is it a low oil sensor....was something not defeated or bypassed correctly with that system?

 

[zainka]

Hi the horn may be deffective, i'll chech that out. Good sugestion. but i forgot to mention that every now and then it is silent. But that might youst be the position of the ignition key cutting power.

Regarding low oil sensor, this was part of the old oil tank and not part of the system anymore as it has been removed. However, the old connector is still there unnconnected and might be an issue when open circuit as now. Must find electric schematic and investigate this further. But i thought low oil was a beep evry 40sec, but thats not the indication I have.

Thanks for answers

 

[racerone]

The electronic circuit in the horn might be defective !!

 

[Terrapin]

Try the following out of circuit test procedure o test:

1. Disconnect and remove alarm horn from electrical system
2. Connect the Black Ground wire from the horn to the negative terminal of a 12-volt battery. Use alligator clips to maintain connection.
3. To test the horn for the initial key switch chirp (which confirms alarm horn is working): Connect the tab terminal that is farthest away from the Black wire (and typically connected to the in circuit Purple wire) to the positive terminal of the battery. When doing so you should hear the desired brief "Chirp". Use alligator clips to maintain connection. Note: Removing this connection and reapplying it will enable you to confirm the "Chirp".
4. To simulate an alarm condition: Connect the tab terminal closest to the Black wire (and typically connected to the in-circuit Tan wire) to the negative terminal of the 12-volt battery. A steady alarm condition should occur while this connection is maintained. Disconnecting should stop the alarm.