1996 Evinrude 150 HP Beeping

[WisconsinPerch]

I am having an intermittent issue with my 1996 150 HP Evinrude. Occasionally when I shift to neutral, the RPMs will jump up to around 1200 rpms and I will get a loud beep. The engine will continue to idle at this high RPM level. This occurs when the motor is fully warmed up. It does not always happen though. Usually the motor idles normally when I shift to neutral. It does seem to be doing it more often now however. The engine is starting and running fine otherwise. Any ideas?

 

[Chris1956]

What model? 60* V6 carbs? 90*V6 carbs, FICHT?

 

[WisconsinPerch]

It is the 60 deg V6 with carbs. The beep I hear is a single beep when it goes into neutral and the RPMs are significantly higher than normal when this happens

 

[Chris1956]

Not sure about the beep, but the Quickstart system will make the motor run fast at idle. Maybe the quickstart sensor is bad?

Alternatively, the self-test part of the system check gauge does beep when motor is first started. Maybe when you shift to neutral, you kill the ignition long enough to make the motor think it has been restarted? Just a guess...does system check cycle thru lights on tachometer?

 

[WisconsinPerch]

I know when it does this, some lights on the tachometer turn on, but cant remember exactly what the lights do. I will check on it this evening and reply back. The engine doesnt hesitate or sputter when shifting into neutral, just idles way too high and I get the beep.

 

[Rustywrench]

Check for loose battery cables at the battery as well as the engine end. A disconnect of battery is what resets the SystemCheck gauge & test beep on the horn. Wing nuts on the battery connections don't work so well. Hard to keep tight. Loose battery cables can be hard on your stator also (overheats it due to inability to charge)! Not sure about the idle up other than the typical unloading from going to neutral. This would always be the same. No answer for that. Maybe someone else has an idea.