1981 mercury trim pump/motor

jamesbalog

jamesbalog

Junior Member
Hello, my trim pump needs oil added to it and well the plug for the fill hole will not come out. The head for the screwwas made of plastic and broke as soon as i put any pressure on it. Hoping there was some metal under the plastic head i tried an easy out and lets just say the whole plug is eaten up and isnt going to come out. Is there any other way to get oil into this reservoir besides the hole designed to take it?


i was just going to buy a new motor/reservoir but i cant seem to find what im looking for. There seems to be 4 different pumps that match the model year and none of them look like what i have. I also cannot find a part number on the one i do have. ive attached some pics of what i have, would any of you happen to know what it is and where i could find a replacement?


thanks in advance










 
Hi James. A detailed (close up) pic of the plug/hole will help. Trying to assess the damage and if it's possible to put a drill/tap/plug or a drill/heli-coil/plug into it and save the pump. :head:
Thanks
 
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I'll get a close up tomorrow.

What I'm really interested in is finding a replacement before I destroy this one anymore trying to fix it.
 
snow has prevented me from getting a pic, it should all be melted tomorrow or tuesday and ill get that. I have made some progress in finding a replacement.

here is the link to the replacement dipstick (the thing i have mangled in my current motor)

http://mercuryperformance.com/89499-dipstick-p-7879.html

Here is the closest thing i can find to the motor that is on the boat. Im sure it will function correctly but Im not so sure the mounting bracket i have will work on this motor. Even if it wont i can figure out a way to mount it to the boat so i will pull the motor and start messing with it more. Id much rather buy a 15 dollar plug than a 200 dollar motor.

https://www.dbelectrical.com/products/tilt-trim-motor-mercury-225-275hp-823653a5-92459a4.html
 
Probably more to it, but in the exploded view, looks like the bowl is held on by one screw,#10. Can u drop the bowl and get to the back of the dipstick.
 
phatdaddy said:
Probably more to it, but in the exploded view, looks like the bowl is held on by one screw,#10. Can u drop the bowl and get to the back of the dipstick.
Click to expand...

Was thinking the same thing Phat. From the exploded parts view looks like it should be a fairly simple job to take it apart.. then put a wrench on it and turn out the dipstick from the inside.:head:
 
sometimes i way over think things and miss the simple explanation.

it does appear i can just drop the bowl and be done with it. will try it tomorrow and report back
 
Well Phat and Destroyer were correct. One screw to pull the bowl off which gave easy access to the dipstick. Took a whole 30 seconds to get apart, wish I would have payed attention and thought simple way earlier in this process.


The dipstick wouldn't budge turning it from the inside either. It broke off before it started to turn out. But I was able to easily drill it out from the inside. Now I just need to clean the threads up a bit and order a new dipstick.


Thanks for the help guys
 
James - PM me if you want a set of new hoses for that motor/pump. I think I have some kicking around the garage that are essentially brand new. There are all yours if you want them.
 
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Here is an update

I got everything put back together and added new oil. The trim motor will run but the outboard will not move.

The hoses were off for a month or more so im sure air got into the system. I cant seem to get the air bled/hoses primed with fluid. Ill mess with it again today and if i cant figure it out im going to hire someone who can.

i figured adding some oil would take all of 5 minutes and ive spent countless hours on this dumb thing, I Should have just left it alone to begin with, im past the point of fed up.


Anyone have any suggestions before this thing drives me crazy?
 
The next day i went out and did the exact same thing i was doing the night before but this time it worked.

Motor is operational and we got to go fishing Wednesday and Thursday
 
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