Force 85 horse troubles with it overheating

[jondear06]

Recently bought an 88 bayliner with 85 horse force. took it out for first time, let it idle in water are 5 minutes had a good spray of water pumping out. Ran it at all differant speeds for about two hours with no problems. When i was waiting for a launch slip open to put it on the trailer i was idling for about 10 minutes and the ?(overheat buzzer)? whent off under the dash. Loaded it up on the trailer tunred key on buzzer still going off. got home about 30 minutes later turned key on no buzzer. NEED HELP checked compression has 130lbs in all 3 cylinders. Next check?????

 

[chylser forever]

Re: Force 85 horse troubles with it overheating

l have had 85 chrysler for 25 yrs good engine pump will go out on idle first sounds like water pump put in new one whole pump they will not pump on idle if has even a few scracthes cant tell by looking.

 

[roscoe]

Re: Force 85 horse troubles with it overheating

Replace the water pump impeller and the thermostat.

 

[jwerner247]

Re: Force 85 horse troubles with it overheating

My '86 85 hp Force did the exact same thing, overheating while idling. I initially bought just an impellor replacement, but after pulling everything apart I found the inside of the water pump housing was corroded, probably from years of sucking up sand and what not. So, I replaced the whole thing and now it idles great, plus I already have an extra impeller laying around just in case. btw, the impeller that came with the whole pump rebuild kit fit way better than just the impeller replacement which was really (i mean really) tight on the key.

 

[jondear06]

Re: Force 85 horse troubles with it overheating

thankyou for the replies i pulled the lower unit today and found that the impellar ooks great but the housing is corroded. I have the whole water pump kit on order so tomorrow i will replace it and try it out.

 

[bowhuntrrl]

Re: Force 85 horse troubles with it overheating

thankyou for the replies i pulled the lower unit today and found that the impellar ooks great but the housing is corroded. I have the whole water pump kit on order so tomorrow i will replace it and try it out.

I don't think the whole kit includes the housing, I know mine didn't on my 50 hp. The housing is listed separately and is big dollars !!!!

 

[MikDee]

Re: Force 85 horse troubles with it overheating

89' 125hp Force, I got the water pump kit from Mercruiser, instead of just the impeller, for this same reason, the housing was corroded,,, it came with the new housing, with a new seal already in it, new plastic tube, and a new ($7 Stainless Key), new bolts, gaskets, and the impeller, for $79,,, well worth it!

 

[jwerner247]

Re: Force 85 horse troubles with it overheating

Mine didn't come with a key, but the housing was definately included.

 

[jondear06]

Re: Force 85 horse troubles with it overheating

Kit came with housing,impellar, key, gasket, plate, and bolts for $80 installed took out to lake and pumped the water great never overheated. thanks for all the help.

 

[bowhuntrrl]

Re: Force 85 horse troubles with it overheating

Kit came with housing,impellar, key, gasket, plate, and bolts for $80 installed took out to lake and pumped the water great never overheated. thanks for all the help.

Wow, that's quite a deal since the water pump kit costs $69 from Mercury!!!