250 SHO trimming down while underway

[fyrefast]

Hey gang, I'm having an issue with the trim/tilt on my 2012 SHO. I have no leaks anywhere. But, while traveling down the lake the motor slowly trims down. I have to keep bumping the trim up every 30 seconds or so. I changed the fluid, but the problem persists. Does anyone know what the problem is?
Thanks in advance.

[yam911]

Internal seals and/or valves would be my guess.

[Squire]

Sounds like it needs a seal kit installed. The motor is putting a lot of stress on them, if air is getting in then this will happen. Another test
would be when you are off the water, trim it all the way up and leave it for a few hours and see if it drops down.

[MCIPinkie]

Just for hits and giggles, try tightening the bleeder screw.

[falcooon]

I had the same problem a while back. Bleeder screw. I backed it off and retightened and all was well.