Trin will raise but not lower

[Ralph 123]

MR tyoe ourtdrive with standard J117 trim pump<br /><br />One of my outdrives goes up easily but won't lower unless I stand on it while lowering the drive. I checked the pump fluid and it is full. Any ideas?<br /><br />Thanks,<br />Ralph

 

[kahuna]

Re: Trin will raise but not lower

possibly a solenoid

 

[denniz]

Re: Trin will raise but not lower

Whats a standard j117 trim pump? If your having to stand on the out drive while trimming down my best advise is to hang on....real tight

 

[Ralph 123]

Re: Trin will raise but not lower

The pump runs fine in both directions. <br /><br />It's your standard older version Merc trim pump - I think the model is J117 - that the number I always see stamped on those kind of pumps<br /><br />When I raise it it goes up just fine. When I try to lower it I hear the pump run fine but the drive does not move. If I have somebody stand on it while I lower it it will go down.

 

[iwldntli2u]

Re: Trin will raise but not lower

Is it pumping fluid into the bilge or outside the boat? check you lines. You could also have a ram that is siezed.

 

[Ralph 123]

Re: Trin will raise but not lower

No leakage anywhere. Can the ram be seized in only one direction? How can I test for that problem?

 

[C17LoadSmasher]

Re: Trin will raise but not lower

Bad check valve?

 

[elpaso]

Re: Trin will raise but not lower

Look carefully where the hyd. rams come out<br />of the trim cylinders. When the end caps,<br />that hold the oil seals and wipers, corrode<br />it will bind rams.<br />In first stages of problem, rams go out but<br />not in. More pressure is used to push outdrive<br />up - than down.<br />Next step is oil in the water and water in the<br />trim pump. After a while you will see seals<br />and wipers hanging on rams.<br />If this is what you see - end cap repair kits<br />are about $50 each at any ships store.

 

[FIN-FEVER]

Re: Trin will raise but not lower

Im having the exact same problems and am curious as to the rebuild and bleeding job.Let us know which way you go.(standing on that outdrive in striper season could get mighty cold on the feetski)

 

[gilby246]

Re: Trin will raise but not lower

RALPH,<br /> Im having the same problem, could you please post culprit and the outcome of your troubles.

 

[Ralph 123]

Re: Trin will raise but not lower

Most likely cause is a bad bushing. So I tried to remove the end cap and could not get it to budge! Shoot! I sprayed the heck out of it with liquid wrench still nothing!<br /><br />Now I'm thinking I need to cut the outer case off, buy the replacement case, bushing and orings and rebuild it or just buy a used cylinder. So, today after leaving it soaked in liquid wrench, it works fine! <br /><br />I am going to try to remove the end cap again later today and will post results.<br /><br />Here is a good link for replacement parts:<br /> Replacement parts

 

[JasonB]

Re: Trin will raise but not lower

I had exactly teh same problem on my MR drive. I rebuilt both rams with new seals. Turns out the seal at the rear end on one was leaking.