slow drop on T&T, 1982 50 hp

[redneck joe]

over the course of 10 hours or so if I don't block up it slowly drops to half or less tilt. Not consistent where it ends up but more often than not 90% drop sometimes half or so.

I topped off fluid. Any other ideas?

 

[Chris1956]

Sure, a leaking PTT piston seal will do that. See if you can get a rebuild kit for the PTT and if special tools (ie spanner) are needed.

 

[redneck joe]

So that would be an internal leak? No external leaks happening.

 

[Chris1956]

Yes, an internal leak. Consider it "blowby" in the PTT cylinder. The check valves could also be an issue. A rebuild kit usually has them too.

 

[redneck joe]

Any tip on where to buy? I seem to only pull up 88 and newer.

 

[Scott Danforth]

agree, either cross-port checks leaking or cylinder seals leaking. being a 40 year old cylinder, going with the seals probably broke down

 

[racerone]

Checked the manual release valve ??

 

[redneck joe]

Checked the manual release valve ??

is that H on this?

https://forums.iboats.com/attachments/reverse-lock-pt-jpg.98153/

 

[racerone]

correct

 

[redneck joe]

Ok i did see that before i knew what it was. Turned clockwise to see then turned back about the same so maybe not all the way in the running position. I'll go adjust now. Thanks.

 

[redneck joe]

well that was not it. Searching for a rebuild kit - any links? as I mentioned i can only seem to find 88 and newer.

 

[Scott Danforth]

Maybe try fivestar?

 

[redneck joe]

Spent several hours running around the lake yesterday so she had a fair amount of trimming. Got home about 1300 and as of 0700 it has barely dropped. Used to drop full in a couple hours.

 

[redneck joe]

A second day out with similar trimming and it dropped completely once home and off the trailer lock.

 

[sludgeguy68]

It aint gonna get better over time. There are rebuild kits, do some searching. The O-rings on the pump are easy, maybe try that first. But I believe it's usually the teflon slipper seal in the piston that fails. I had a very difficult time installing this without a special slipper seal tool from Mercury.

 

[Dave1027]

My 88 100hp has been doing that for years. I just got used to it. It's not really worth it to me to go through the hassle fixing. As long as it tilts up and down, that's all I really need.