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Bigbass91
10-26-2006, 07:10 AM
I noticed yesterday that my pump was losing it pressure and my motor would go down. It was fine last weekend when we went to the lake. I thought it could be the kids next door that was lowering it but I think it is the pump. It goes down after about 4-5 hours. What could cause this ?

Thanks

Crappie Chatt
10-26-2006, 07:24 AM
Look at the hyd. cylinders that push up the motor. I would bet one or both of them have internal leaks :mad: at the seals. <*)}}}><

zappaf19
10-26-2006, 07:48 AM
I had a real small leak in the pump seal. Took me for ever to find it. I used tranny fluid finaly so I could see where it was comeing from. My engine is a old merc 115.
Bill

Bigbass91
10-26-2006, 09:58 AM
how do you fix it?

jigsbydirk
10-26-2006, 10:13 AM
if the seals are out sometimes you can get a kit but often times it means it is time for a new cylinder or worse a new unit. hope it is not the latter.

jbd

Barnacle Bill
10-26-2006, 10:21 AM
When I first got my old 83 Merc 150 I had a small leak somewhere in the hydraulics. A friend of mine suggested putting some Trans-X in it. So I did with the plans of resealing it later. That was 4-5 years ago and it hasn't leaked since. Its certainly worth a try.

Bigbass91
10-26-2006, 03:17 PM
I do not know alot about these units. Where do you put the fluids? I does not seem to have a major leak.

Barnacle Bill
10-26-2006, 04:15 PM
I do not know alot about these units. Where do you put the fluids? I does not seem to have a major leak.

Maybe thats all you need then is to add some fluid. Mine has a small resevoir under the pump. I have a large plastic screw head that is also a dip stick. Fluid can be added there.

Bigbass91
10-26-2006, 05:51 PM
What kind of fluid do you use?

crappieken
10-26-2006, 05:51 PM
I just had to replace the cylinder on my trim motor several weeks ago. It cost me $402 for parts and labor. It was on a 1993 60 hp Mercury. Have not had any problems since the repair.

Bigbass91
10-26-2006, 07:28 PM
Maybe thats all you need then is to add some fluid. Mine has a small resevoir under the pump. I have a large plastic screw head that is also a dip stick. Fluid can be added there.
I have the large plastic screw also. When I opened it fluid came out. It may have been because the boat was tilted back( forgot to level.) How do you put fluid in them?

boatman44
10-26-2006, 08:21 PM
trim motor all the way up and put the manual lock, this way the cylinders get filled and also you want get finger cut off.

crapaddict
10-27-2006, 04:36 AM
I know mine started to do that when trim was all the way up it would leak down before I could get my boat in the water it only does that every so often.Is it possible that it could have some trash in the fluid :confused: is there a way to change out the fluid? if so I would try that first

Barnacle Bill
10-27-2006, 06:39 AM
I have the large plastic screw also. When I opened it fluid came out. It may have been because the boat was tilted back( forgot to level.) How do you put fluid in them?

I use an oil can with a flexible neck. What motor are we talking about?

zappaf19
10-27-2006, 07:05 AM
I use Sae 30. motor oil. My pump is old so it is seperate from the motor and a pain to get to. Tranny fluid is hard on my pump so i just use the 30 weight. Hope this helps.
Bill

Barnacle Bill
10-27-2006, 11:18 AM
I use Sae 30. motor oil. My pump is old so it is seperate from the motor and a pain to get to. Tranny fluid is hard on my pump so i just use the 30 weight. Hope this helps.
Bill

My factory manual calls for 30w oil. But its an old 83 model.

Bluejay
10-27-2006, 02:01 PM
Wouldn't a transon saver also help to keep some of the pressure off seals? Maybe they have na dual purpose.:confused:

ky-slabseeker
10-27-2006, 07:32 PM
It sounds like you definitly have a o ring bad somewhere.I know on some motors you will have a o ring on the end of the manual release valve.If it is broken it will let the hydraulics leak off. I hope this helps you out some...