1988 Force 9.9 overheating

Ship of Fools

Recruit
Joined
Apr 29, 2008
Messages
4
I have a 1988 force 9.9 that is overheating. First time it happened I was 500 yards from the launch and when it happened I dropped anchor and fished for a few hours then had my friend tow me back. I started it up to check the water flow and it was fine and ran fine the rest of that day and the following day and I figured I must have had some sort of blockage that cleared. Then the next morning it overheated again.

I dropped the lower unit and checked the impeller (it was fine - only a year or so old) and connected a garden house directly to the tube. Initially I had very little flow out of the telltale but within a minute had two solid streams so I was hoping I was all set. Turns out I wasn't set since it overheated again.

One thing I did notice while running the garden hose was that there was water coming from somewhere other than the tell tale but I couldn't see well enough to identify where it was coming from.

Should water be coming from somewhere in that area or is it a closed system and I have a hose loose or damage somewhere?

From what I have found in my research there is no thermostat for that year / serial number.

Any thoughts on how to proceed??
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,119
The water tube in the mid section, does it pull out easily?
There is a seal at the top under the motor, it could be allowing the water to bypass the head?
Get a parts diagram and check the mid section pics.
 
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