Tilt/trim gremlins

[chopper6322]

So I have a 1990 evinrude 70 hp and I changed the seals on the 2 trim rams and the tilt ram. Now it is holding fluid but seems to struggle going down...tilt side will move down with light pressure on the motor but once it gets to the trim portion I have to put all my weight on it to get it to move...but it always goes up fine...did I do something wrong in the seals or just reveal another problem?

 

[jakedaawg]

Salt Water? Check tilt tube and main pin for corrosion.

 

[chopper6322]

Yeah it's saltwater...I will check those out tomorrow afternoon and get back with ya. Just spitballing though, wouldn't corrosion cause trouble in both directions?

 

[flyingscott]

Did you bleed it

 

[chopper6322]

I believe so...filled it, ran it 5 or 6 times the released the fill screw to allow air out, filled it again and repeated about 3 times until a very small amount of air was released...is that right?

 

[oldboat1]

^^Maybe corrosion, but also thinking you might need to bleed the system -- maybe an airlock. I THINK there is a release valve that does that automatically, but maybe not functioning. Try searching for relevant threads "bleeding tilt and trim" or similar.

 

[flyingscott]

To bleed run it to the the top of the stroke and open the fill screw and refill the fluid should be to the top of the fill hole. Keep doing this until the fluid stays to the top of the fill hole . If that doesn't work on the right side of the motor bracket is a manual release turn that out until it stops try to get it to drop.

 

[chopper6322]

When I loosen the manual release it stays up until I put pressure on the motor. I will continue bleeding it tomorrow and see what happens.

 

[oldboat1]

FYI -- some additional info here: http://forums.iboats.com/forum/engin...ystem-bleeding

Good luck.

[think that manual "release" might be a lock to safely hold the motor in the tilted position for adding fluid. Guessing if you turn the "release" the other way, the motor will be released downward. Don't get hurt.]

 

[flyingscott]

The manual release is not a lock to hold the motor up. It is an override to allow you to tilt the motor up and down if the T/N/T ever fails.Has nothing to do with holding the motor up for adding fluid. If all else fails put the trailer lock down on the motor if yours has one. Then run the tilt and trim down should be able to get the small rams to run down on their own.

 

[oldboat1]

will defer to flyingscott, chopper -- seems pretty sure. Check the thread indicated -- looks like useful info.

 

[chopper6322]

I read through the thread it looks very helpful and I will give it a shot...also It does have a trailer lock I'll have to see if the trim rams move with it up...does it tell me anything if they do or do not?

 

[flyingscott]

The trailer lock works like this tilt the motor all the way up and put the arms down so they lock the motor up. Then run the T/N/T down the tilt ram will pull the motor down once it's tight the trim rams should start moving one at a time. But make sure you have bled it out correctly can take a while the trailer lock trick is the last resort. If you are still able to add fluid every time you run it to the top it is not bled yet.

 

[chopper6322]

Got it...thanks for clarifying...I will bleed it and get back to you guys on the results.

 

[chopper6322]

alright bled it until i couldn't add fluid anymore and still have the same issue, took the trim ram covers off and filled them with fluid then reinstalled, same problem, I saw a video of someone running it up and down with the reservoir screw removed the whole time to bleed it and so i tried that, because youtube is always right , it just kept leaking all the fluid out on the down stroke, then i'd refill it once it was all the way up, did it about 4 times and never seemed to get any better. I believe at this time it is thoroughly bled. any other ideas?

 

[jakedaawg]

Did you check for corrosion yet? It really is more noticeable on the down than on the up if it is an issue.

 

[flyingscott]

Did it work right before you put the new seals in if it did you are probably going need to go through it again. Also if it's salt water corrosion pump every grease zerk you can find full of a good quality grease.

 

[oldboat1]

grease can be more of a patch than a solution for salt water corrosion, and can make it worse. If you pound some more grease in, you at least might add to the stuff that is blocking movement. At worst, you might break weakened metal.

Assuming it's salt corrosion, you might try some ATF, Marvels Mystery oil, white vinegar.... Need to dissolve deposits if you can.

 

[chopper6322]

Old boat you mix those 3 together and run it through the system? It did work fine before the seals so I will pull it back apart and check my work thank you all for the suggestions...owning a boat is certainly an education

 

[jakedaawg]

Old boat you mix those 3 together and run it through the system?

No, no, NOOOO....
He is talking about for the grease zirks. Not inside the system.