You might want to try some Kroil on your hinge pins. If I recall correctly (maybe a stretch), either the pump uses high pressure to raise the drive but lower pressure to lower it or it has different surface areas for the pressure in the rams. Either way that would explain no prob coming up but difficult going down.
One diagnostic if you can get at is to remove the aft trim pin from the rams and see if you can lift the drive.
Merc Manual #28 has a short section on it but it does not seem to exactly fit your symptoms.
|
11-08-2015, 09:26 AM
Threaded Mode