On Sep 7, 12:16 pm, Gene Kearns
wrote:
On Thu, 06 Sep 2007 11:44:02 -0700, Mike C penned the following well
considered thoughts to the readers of rec.boats:

My trim tabs stopped working. I checked the fluid level, and it was
non-existent. I added ATF and switched on the tabs. The fluid all went
into the water. I believe only from the starboard hydraulic piston. I
have insta-trim tabs. I take it I have to replace the piston. How do
I do this? Does the boat need to be out of the water (problem!)? Is
there anything else I can check? There is no leaking inside the
engine compartment by the pump and I checked the hose connector to the
piston and it seems fine.

I think that insta-trim requires biodegradable (vegetable) oil. Put
the wrong oil in the system and you'll likely destroy ALL of the
seals. If your hose hasn't split, then you've probably lost the seals
in that cylinder. I think all Insta-trim's are single acting
cylinders.

--

Grady-White Gulfstream, out of Oak Island, NC.

Homepagehttp://pamandgene.idleplay.net/

Rec.boats at Lee Yeaton's Bayguidehttp://www.thebayguide.com/rec.boats
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ATF will not hurt it. Few fluids will actually damage seals.