I/O Drive slowly going down.

[Bayliner175xt]

Hi we have a Bayliner 175 (2003) with a 3.0 and a Alpha 1 drive.
It seems to be in good working order as far as it going up and down.

My question is when we pack the boat away for any length of time the drive slowly comes down more or less to the Trimmed down position. this time frame is over about 48 hours.
(I know it should be left down for any long periods of time).
Is this normal or do I have a leaking return valve, the system doesn't leak any
hydraulic oil, or maybe another problem.

thanks in advance.

 

[Dave.Mishchenko]

Re: I/O Drive slowly going down.

It shouldn't come down at all. The below is from the service manual. Do you have a service manual for the drive?

Sterndrive Unit Will Not Stay In Full UP Position For Extended Periods


External leakage.
Check for cause and correct. Add oil to
pump and bleed trim system.

Pump OUT/UP circuit leaking internally.
Test. (Refer to SECTION 5A) Replace
adaptor 2 or attempt to repair by replacing
the following:

Thermal relief valve 4

Poppet valve seals 9

Trim cylinder(s) leaking internally and
pump DOWN circuit leaking internally
(both must be faulty to cause this
problem).
Rebuild cylinders 5 Repair or replace
adaptor 2 as required.