2000 Mercury 150 efi Tilt and Trim Will not trim down

[TomKatTJ]

I replaced the tilt cylinder seals, not the trim cylinders. Filled the system with ATF and bleed the air out by raising and lowering the motor with the hydraulic pump and the manual release valve. Motor will tilt up but only lowers until it hits the trim cylinders. I can lower complete with the manual release and bring it back up with the hydraulics.

Also does the tilt position sensor only control the indicator gauge or does it help with controlling the hydraulic pump?

 

[Chris1956]

Do you have the PTT unit installed on the motor?

 

[TomKatTJ]

Do you have the PTT unit installed on the motor?

Yes

 

[Faztbullet]

Did you remove tilt rods from the unit when resealing?

 

[TomKatTJ]

Yes

 

[Faztbullet]

Need to make sure you put em in the correct sides as there is a P and S, one has a check valve

 

[TomKatTJ]

Yes

Thanks to who responded. Figured it out after Faztbullet got me thinking about check valves. 2 of the 7 balls in the check valves were not seated properly on the end of the Tilt cylinder. Reseated and ready to go fishing.

 

[TomKatTJ]

Need to make sure you put em in the correct sides as there is a P and S, one has a check valve

Thanks Figured it out after you got me thinking about check valves. 2 of the 7 balls in the check valves were not seated properly on the end of the Tilt cylinder. Reseated and ready to go fishing.

 

[Faztbullet]

Go get em... I am just waiting for the water temp to drop into 40's to go Float-n-Fly