Alpha One Power Trim Problem

[Racer57]

I have a 2017 135 HP Mercuiser with an Alpha I/O.

I have frequent issues with lowering the power tilt after it sits unused for a week or so.If I have someone hit the lower button and I press down on the stern drive, once "broken loose" it does go down. It then can raise OK, but when I try to go down again it sticks and I have to help it along. Once it loosens up though, it will work all day just fine.

I have lubricated the hydraulic pistons but that only provides temporary relief.

Any thoughts on troubleshooting this? replace cylinders? Bad Pump?

 

[Bondo]

Ayuh,...... When you raise it up, at the top, you can hear the pump labor,.....

Tap the down button a couple of times to unload, the over-load,.....

 

[wahlejim]

Happens to both my sterndrive and outboard, move the drive in both directions a couple of times to relieve the pressure in the rams. The weight of the outdrive causes pressure buildup, especially if you are trailering. If you are trailering, I highly recommend the plastic trailering sleeves for the rams. It will minimize the issue you are encountering.

 

[dingdongs]

The 2 anodes on the end of the rams sometimes oxidize and clearance around the ram shaft is zero. Remove anode and file out the zincs with a really coarse round file to increase clearance around horseshoe shape once again.
screws 5/16 get really tight to remove too as zincs oxidize around these too.
would suggest using a hex socket to remove bolts. Clean lube and refit.