2007 4.3L alarms

[cardiacrhythm]

Have a 2007 4.3L Mercruiser TKS (carburated) in a Bayliner 185. Freshwater only. The alarm ringswhile engine running at speed. Oil pressure is good, temp is good, drive oil level is good. I have done the diagnostic steps to try to eliminate the alarm but THE ALARM STILL RINGS INTERMITTENTLY WITH ALL THE ALARM SENDERS DISCONNECTED! What am I missing? Typically will alarm when throttling down from high speed. But with all alarm senders disconnected it alarms with no pattention (high speed, low speed, straight line, turning. ) The son says he's going to cut the buzzer out. Any thoughts?

 

[alldodge]

Howdy

What is your engine serial number?
Is it a solid alarm or on/off?

 

[cardiacrhythm]

Sorry AllDodge was away from the water.
S/N OW684882
Alarm is intermittent. Will ring solid sometimes, always goes away when back down below 3000 rpm.

 

[alldodge]

All the sensors disconnected which I'm assuming oil pressure, water temp and drive lube.

You probably don't have this being a TKS, but just in case. Look on your shift plate and see if you have a gear switch. Otherwise you probably have a pinch on the Tan/Blue wire going back to the alarm

 

[cardiacrhythm]

Thanks. Yes alpha no gear switch. Think I found the short (pinch) will be away from the boat for a week or so but will resend when I have results! Gotta love heat shrink and butt conectors!