1964 Mercury 85HP overheated

[aditent]

I bought a power boat with an KIEKHAEFER 1964 Mercury 85HP Serial no: 1572580.The old owner told me that the motor takes water.I replaced the lower cap assembly with new seal and bearings and it runned well for about 10 hours.After that it got warmer and warmer and finaly overheated.It was smoke and steam that came out from exhaustion.Now I opened but I don't know what to do.DoI have to replace the propeler and all the gaskets?<br />Does it have a thermostat? Where should I look for it?<br />Any suggestion would be helpfull.Thank you.

 

[JB]

Re: 1964 Mercury 85HP overheated

Hi, Aditent.<br /><br />You really need a manual, maybe two. A users manual and a repair manual.<br /><br />Good luck.

 

[papasage]

Re: 1964 Mercury 85HP overheated

i have a 85 1974 rebuilt the foot which i knew when i bought it ran it fo 30 minutes up theriver didnt run good so i rebuilt the carbs then it wouldnt fire replaced the trigger in the distribitor if ran fine took it to the lake it got hot watere was coming out the piser .agood stream but it was very hot . now i am looking for a piston . found 3 need one more. keep looking at e bay havent found one yet .still looking.all the pistons had cracked skirts . dont think that is why it ran hot. but not sure . i had replaced the water pump while i was in the foot .

 

[wishinIwasFishin]

Re: 1964 Mercury 85HP overheated

yeh I'm with jb get a manual and then check the water pump the manual will tell you how<br /><br />cheers daryl

 

[HUMORLESS JIM]

Re: 1964 Mercury 85HP overheated

This is not a reply. I am unable to make a new post, so will try this way.
Where do you find the engine serial number so I can find out what year the motor is? Also how tough is it to replace the water pump?
Thanks
Humorless Jim