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1991 Johnson 225 Tilt Trim system jerky going down

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jpburks

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So, as the title says, the tilt/trim system is jerky going down. It works amazing going up and has no issues. But going down it goes slower and "bumps" downward. It shakes the whole boat when this happens. I have had to replace motor in the last year, but it was great once I got the air out. I then noticed that everytime I used boat, tilt/trim stopped working. I then realized that the reservior cap had no o-ring and that I had been leaking fluid. I replaced the o-ring and now holds steady fluid. So, why is it jerky? My only guess is air in the system, but I have worked it up and down hydraulically and replenished oil. Doesn't seem to be an air in the fluid problem. Any guesses?

Info: The boat goes on saltwater more than fresh but is washed down and rinsed out after every outing. Used about 3 times a month on weekends.

Thanks!!
 
Corrosion in a salt water environment jams the plastic bushings onto the tilt tube.------------Remove tilt tube ----remove bushings-----scrape out the white aluminum oxide-------re-assemble.
 
So, I am not exactly sure what the tilt tube is. I have looked on the parts diagram for the E225PXEIC and I cannot find that anywhere. Is that the main assembly? Which bushing are you referring to? Thank you so much for your help!!!
 
The bolt that goes through the top eye of the big cylinder rod is 'frozen'.
Might be a pain in the xxx to get out, have a lot of heat ready!
 
OOOOOHHHHHHHH!!!! Gotcha!! :) Heat is not a problem! I will work on that today; remove, clean, grease, and reinstall and will report back later. That you guys!!!
 
Well, I have tried to free it up and no luck. I hammered the pin out, cleaned and put it back in, greased like a pig, and it is still jerky. :(I am at a total loss here. I did notice that going up, the system works like a dream! It screams up like the motor weighs nothing. But going down is painfully jerky and then in trim, painfully slow. Any other ideas as to what this could possibly be? Thanks :)
 
Did you test the trim/tilt function with the pin removed?
Did you test that the engine was moving freely up and down on the tilt tube?
 
Haffiman, by tilt tube, do you meab the main piston? I know that I took manual release off and lifted it up and down with absolute ease (other than the weight, of course). The pin was a major biotch to get out, but it wasn't really corroded. I cleaned it up and regreased it, but I have a hard time thinking that that is the problem. I did not, however, operate the tilt with the engine weight off of it. That was a smart idea that I never had ;)

The pi I removed was #22 on

http://www.marineengine.com/parts/johnson-evinrude-parts.php?year=1991&hp=225&model=E225PXEIC&manufacturer=Evinrude&section=Power+Trim%2Ftilt+Hydraulic+Assembly

I am assuming that is the right one.

I did nothing with #47 of

http://www.marineengine.com/parts/j...XEIC&manufacturer=Evinrude&section=Midsection

I am going to go home and try to tighten up the nuts on #47 to see if that helps.


P.S. I am starting to feel foolish here :confused: I just realized that my tilt cylinder pin had n bushings. I am assuming that this will also cause issues, no matter how greased the pin is. Please tell me it isn't so, it took me FOREVER to get that damn pin out and back in. As always, you guys have saved the day, and I will try to fix the boat this afternoon.
 
Normally the corrosion is between the bushing and the housing making the bushing squeeze on the pin.
If this gets severe, the rod might bend and the same problem occurs in the cap assy 21.
 
jpburks said:
So, as the title says, the tilt/trim system is jerky going down. It works amazing going up and has no issues. But going down it goes slower and "bumps" downward. It shakes the whole boat when this happens. I have had to replace motor in the last year, but it was great once I got the air out. I then noticed that everytime I used boat, tilt/trim stopped working. I then realized that the reservior cap had no o-ring and that I had been leaking fluid. I replaced the o-ring and now holds steady fluid. So, why is it jerky? My only guess is air in the system, but I have worked it up and down hydraulically and replenished oil. Doesn't seem to be an air in the fluid problem. Any guesses?

Info: The boat goes on saltwater more than fresh but is washed down and rinsed out after every outing. Used about 3 times a month on weekends.

Thanks!!
Click to expand...

Try this it worked for me https://www.youtube.com/watch?v=u2Xp3g4QkPA
 
The jerkiness is caused by the main tilt piston hanging up within the main tilt tube. Why it is hanging up is anybody's guess... a burr, a slight bit of corrosion, a damaged/folding "O" Ring, something! BUT, regardless, that is where the jerkiness is occurring.

The "O" ring was missing from the fill screw? If fluid was leaking out... water was leaking in! If that PTT fluid within the unit looks milky.... drain and replace it.
 
Malinovs1....... You're quite adept with the video camera and the explanation of how you cured your "jerking" problem, I'm impressed.

In my case however, having encountered this problem many times in my career (30yrs+), the very first thing I would do is to have the engine tilted up to its extreme and fill the reservoir to overflowing if needed... BUT... again, in my case(s), it did not cure the jerking and the scuffing within the main tilt cylinder proved to be the problem.

Hopefully "JPBurks" jerking problem coincides with the problem you encountered and is solved just as easily.

Let us know what you find "JP".
 
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