1989 Force 125 HP alarm

birdgod

Petty Officer 1st Class
Thread starter
Joined
Sep 21, 2009
Messages
275
Hi, i am have a problem with force 125hp 1989. if i idle for more then a few mins the Overheat alarm will sound. but if i start it and start going above 5mph, the alarm will no sound.
At first i though it was overheat and change out the impeller and check the water flow. everything it ok. but stil if i let it idle for more then a few mintues the overheat alarm sound.
Here is my questions:
1) is over heating the only alarm on this OB?
2) how can i check for overheat? I use my hand to feel the water comming out of the 2 holes at the back , water is hot but can still feel it with hand. what should be the water temp exiting?
3) where do i start? since the alarm only sound when idle. not at high speed.
 

Jiggz

Captain
Joined
Oct 23, 2009
Messages
3,909
Re: 1989 Force 125 HP alarm

First, you need to make sure you have the proper idle speed. 1000~1100 RPM on idle and around 750~850 in gear engaged. The other thing to check is the water port system and also the thermostat to make sure it opens fully. Remove and inspect the t-stat and test it in hot water. It's not unusual marine growth will narrow the water paths so you might want to clean it as much as you can.
 

birdgod

Petty Officer 1st Class
Thread starter
Joined
Sep 21, 2009
Messages
275
Re: 1989 Force 125 HP alarm

thanks. Will check that
 
Top