Evinrude Tilt and Trim

[rstex]

My 1984 Evinrude 150Hp tilt stopped working. It won't move either direction. Back story:
Went to winterize boat. Raised the outboard, later it was stuck in full up position. Lowered by Manual Release Valve. Fluid looked very "frothy". After checking fluid level and topping it off, fully charged battery, trim motor sounds fine in both directions.....It won't move in either direction.

I have since removed the pin, connecting it to the outboard, still no movement in either direction. I can release the MRV and move the tilt cylinder. As a side note I pushed the tilt cylinder all the way down, tightened the MRV closed. When I attempt to cycle the tilt system in the down position the tilt cylinder slowly creeps upwards??

I have seen where ppl say they "rebuilt" the system but only mention seals, o-rings etc. Is it not common to replace everything inside (assorted check valves etc)?

Also, as I was researching seals and o-ring kits I can not determine what type of tilt cylinder I have. I have looked for any type of numbers located on the tilt cylinder with no avail. I know it is supposed to have a P for Prestolite or S for Showa

 

[Truckguy701]

If the fluids is frothy either you where low on oil or your pump has a leak on its suction tube.

 

[jimmbo]

Frothy Pink, well someone been using ATF, and some water might have contaminated it, or there might be some air in the system. Try placing the Trailer lock/Support into position, then try lowering it. If it does goes down, keep going until the 2 Rams are fully retracted. Then run it up and down several, checking the Fluid level, You will probably have to add some. But if the unit is getting water inside, it needs a tear down


The proper Service Manual will provide more complete bleeding instructions, and perhaps flushing instructions

 

[rstex]

Frothy Pink, well someone been using ATF, and some water might have contaminated it, or there might be some air in the system. Try placing the Trailer lock/Support into position, then try lowering it. If it does goes down, keep going until the 2 Rams are fully retracted. Then run it up and down several, checking the Fluid level, You will probably have to add some. But if the unit is getting water inside, it needs a tear down


The proper Service Manual will provide more complete bleeding instructions, and perhaps flushing instructions

Tilt and trim cylinders won't move.

 

[racerone]

Motor has been replaced.----Tilt cylinder has been replaced.-------There are Lots of good used , complete units available.----I say look for one.-------They are the same year after year from 3 , 4 . and 6 cylinder motors.---Shop carefully.