alarm went when trolling only

dannyman3

Petty Officer 2nd Class
Joined
Apr 13, 2009
Messages
147
hello i have 1990 200 gt and was ideling arund trolling the alarm went off i shut it down and when ya turn the key on it would still be on for about 1 min i ran it for two hrs after that it never went off again so i started trolling and it went off again it only takes 4 or 5 mins when trolling for the alarm to go off what does this mean it had water comming out the peahole is it just low water psi at idel thanks
 

Joe Reeves

Supreme Mariner
Joined
Feb 24, 2002
Messages
13,262
Re: alarm went when trolling only

That usually indicates that the impeller is failing or damaged resulting in a low flow pressure at low rpms. Best to drop the lower unit and replace the water pump assembly, also a good idea to change the thermostats at the same time.
 

alangf

Petty Officer 2nd Class
Joined
Apr 12, 2009
Messages
105
Re: alarm went when trolling only

Ditto on the impellor
 
Top