Power Trim Leaking

[RickN]

I have a 1980 115 HP Johnson and replaced the power trim motor. The power trim works great until the fluid leaks out in about a month or so, then you have to refill it. It appears to seep out around the "o" rings on the main hydraulic piston. I know the correct way is to take it off the motor, remove the hydraulic system and replace the "o" rings in the pistons, but a friend told me that I could use ATF automatic transmission fluid/with the stop leak in it and that would work to stop it from seeping out. Is this true or do I have pull the motor off, and dissassemble/repair the trim? I spent allot of work getting the motor working good, and want to launch the boat ASAP.<br />Thanks Rick

 

[rabidfish]

Re: Power Trim Leaking

Patience "grasshopper"...<br />Fix it properly, ASAP. Then have no worries as to it's condition. You'll thank yourself in the end...

 

[jy118lfd]

Re: Power Trim Leaking

Remember if fluid can get out water may get in

 

[MrPriapism]

Re: Power Trim Leaking

I have the same issue with the only visible leak being around the two pistons that tilt/trim. Is it possible to replace these two sets of rings(?) while the unit is still on the boat? There seems to be enough access, I just have never done this. Thanks, Tim

 

[RickN]

Re: Power Trim Leaking

Can anyone explain the correct way to replace the "o" rings, what Tools I need and what is the best place to order the Parts?

 

[RickN]

Re: Power Trim Leaking

Does anyone know where I can get diagrams of the Lower unit, and a blow by blow method to changing the "o" rings in the power trim? It looks like you can change them without pulling the motor off the boat?

 

[RickN]

Re: Power Trim Leaking

Does anyone know where I can get diagrams of the Lower unit, and a blow by blow method to changing the "o" rings in the power trim? It looks like you can change them without pulling the motor off the boat?

 

[ob15]

Re: Power Trim Leaking

Your best bet would be to order a factory manual. Will tell you how to do it exactly.

 

[RickN]

Re: Power Trim Leaking

Thanks for the reponse. I have a factory manual which explains how to rebuild the motor etc. but doesn't get into the power trim. I think the trim unit is manufactured by some hydraulic company. I can see that the two smaller pistons unscrew, my concern is that I am great at taking things apart buy putting them back together is another story!<br />Rick