Has anyone ever successfully fixed a leaking trim unit?

**Radiant** · 05-01-2019, 10:00 AM

This might be the fix. Just need to figure out what O-rings are needed. Or if the part number I posted earlier will work.

https://www.screamandfly.com/showthread.php?172770-87-3-Ram-Tilt-Trim

**NeedOne** · 05-01-2019, 04:41 PM

Originally Posted by Motv18

Need one trim extender will probably fix that. The tilt ram will go down under power. Unless the trim ram is leaking down.

If if you have a high angle transom it sucks. Hope this is the problem.

Man I seriously appreciate you mentioning this..
Checked it out just in the garage, at level trim it's at the limits of the trim rams. Will test with trim extenders and report back, if this fixes it that means I have a spare 'good' 3 ram Radiant if you end up needing it

**FUJIMO** · 05-01-2019, 07:30 PM

**Dave S** · 05-01-2019, 08:47 PM

One of the short rams has a valve or O ring that gets snotty......so I have been told. If any one.... CHAZ.... needs 1...2....3 rams.... I need to clean out my yard ..... Help.... will load and ship......Just hate to send to China.....

**Chaz** · 05-01-2019, 10:43 PM

Originally Posted by Dave S

One of the short rams has a valve or O ring that gets snotty......so I have been told. If any one.... CHAZ.... needs 1...2....3 rams.... I need to clean out my yard ..... Help.... will load and ship......Just hate to send to China.....

Yes sir , I'm sure we can work out some kind of deal ..

I'll PM you my Info ..

A lot of the cores we have been getting lately have had that new "salt-oil" in em ..

I'm down to only a few good closure caps. If someone doesn't send in a good one with their cylinder I have to have the Mrs turn all the rot out , I fill them in and she has a set of cutters that a tool and die maker here in town made up for us that cut's the O-ring , dust seal and snap ring seats . Can't buy em new .. and it's quite a bit of work to bring one back from the dead ..

**Radiant** · 05-02-2019, 07:49 AM

Last night I removed the trim motor. I ran into my first snag. I removed the 5 bolts shown and I am not sure what to do now. My motor does not look like the one from the link I posted. Just below that center hole is a spot where you can stick an allen key down and turn something that never gets tighter or looser, I am assuming this is turning the motor itself because fluid comes out of either hole beside it depending on the direction you spin it

**KIRCHNER** · 05-02-2019, 09:17 AM

Originally Posted by half fast

Nope , I’ve never been successful .

went to two merc shops, they said no can do. told me they all leak, didnt want any part of it..

**strat250** · 05-02-2019, 10:03 AM

Mine was leaking and was soft and I couldn’t bleed it. I put in a half of a bottle of hydraullic pump stop leak and topped it up and no leaks and solid. It was screaming like a bansheee and now sound great and works perfect.

**strat250** · 05-02-2019, 10:52 AM

This is what I used

Click image for larger version.

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**Wayne Cammidge** · 05-02-2019, 11:35 AM

On the 3 ram system that falls.
After you have tried a new release valve and O rings
See Mercury parts diagram posted above
Part #9 , the Port Trim cylinder, has a bypass valve in it, to release the pressure when it reaches maximum Tilt.
That little check valve goes bad and is not serviceable. You will see that there is a little screen trying to protect it.
That is the cause of all your issues.

**Radiant** · 05-02-2019, 11:56 AM

Originally Posted by Wayne Cammidge

On the 3 ram system that falls.
After you have tried a new release valve and O rings
See Mercury parts diagram posted above
Part #9 , the Port Trim cylinder, has a bypass valve in it, to release the pressure when it reaches maximum Tilt.
That little check valve goes bad and is not serviceable. You will see that there is a little screen trying to protect it.
That is the cause of all your issues.

So what’s the fix? Clean the screen? I guess I’ll pull that apart and look. Might try the stop leak suggestions if it doesn’t fix it. Still wondering if anyone knows about the pictures I posted above of the motor and valves in there. I can’t take it apart. I must be missing something

**Wayne Cammidge** · 05-02-2019, 11:59 AM

You may need to replace the Port Trim Ram complete

**KIRCHNER** · 05-02-2019, 02:56 PM

Originally Posted by strat250

mine was leaking and was soft and i couldn’t bleed it. I put in a half of a bottle of hydraullic pump stop leak and topped it up and no leaks and solid. It was screaming like a bansheee and now sound great and works perfect.

score!

**FUJIMO** · 05-03-2019, 10:03 AM

**Glastron1987** · 05-03-2019, 06:42 PM

Didn't read through the whole post but twice on different trims I had a problem where they went down either relatively quickly or overnight, and all it took to fix it was to replace the o-rings below the filler cover. I forget the size but you should be able to get something close enough from an o-ring supply company in an industrial area probably a lot cheaper than going OEM.