Tilt/trim unit leaks down

[Realgun]

Force 1988 85Hp 856X8A. <br />The engine leaked down and draged about 6 iches on the driveway I also backed up going nowhere fast! Thats how I found the engine had leaked down again. No the motor will not go up at all!<br />The tilt motor tries real hard but the engine does not move it seems the down works.<br /><br />Where do I get this spanner to take off the top of the tilt cylinder? <br /><br />Shuold I also replace all O rings and seals?<br />Can I get everything needed? I know O-rings are universal just get the correct diameter but what about the stuff in the pump?

 

[chuckz]

Re: Tilt/trim unit leaks down

The pump has a couple of small o-rings in the check valves that can be removed from the side with an allen wrench. Internally there are no o-rings. I disassemble my pump a couple of weeks ago. There were only springs and ss balls internal. No need to disassemble it. I did find crud in one of the check valves.

 

[Realgun]

Re: Tilt/trim unit leaks down

I was looking real close at the tilt/trim unit as a whole and notice there are 5 bolts holding the cap on the trim. I also noticed that 2 of the heads on the bottom are missing and the cover is slightly cocked on the cylinder. I think this is my problem.<br /><br />I will report back and post a step by step on the shareaprojects site later.

 

[Realgun]

Re: Tilt/trim unit leaks down

The step by step was too hard. I worked all day to remove and fix the trim cylinder. This has fixed the issue for now.<br />Tilt/Trim pics<br /><br />Basically I was inspecting the trim cylinder and notice the top was a little crooked. I then looked closer and two bolts were missing to boot.<br />Internally the trim looked good but the o-ring was in two pieces.<br />I replaced all O rings in trim cylinder and the 4 bolts as I could not get 1 of the studs that was the remaineder of the bolt out. I will rebore this later and install a bolt. I had to get a different bolt than what was in the unit originaly as Merc does not have them anymore. I did find SS 1/4-20x1 3/4" With a hex head instead of the twelve point head. They look good and should be fine. <br /><br />Also the guys at a local hydrolic place found all but 1 ring for the trim unit. Oh and they gave them to me for free!! Luckily the local marine guys had that o-ring and thats it.<br /><br />In testing it all worked except the small leak that was a result of not tightening the line up DOH! <br /><br />Will test tomorrow I hope! If not then Tuesday.<br /><br />I was lucky there was not scoring or problems with the rest of the unit.

 

[bnk999]

Re: Tilt/trim unit leaks down

Nice job -- Don't you love it when you don't have to replace anything major!

 

[Realgun]

Re: Tilt/trim unit leaks down

Yes, but it was a P.I.A. job to do. I already did the hard stuff like the floor, controls wiring etc...

 

[my1stboat1]

Re: Tilt/trim unit leaks down

hey guys im new, names mike... i have an 88 bayliner/trophy i just recent picked this boat up and the fitting on the trim pump was broken off i ordered the new bend strap and awaiting arrival... can you guys tell me how to fill and bleed the trim setup...


thanks any advice would be greatly appreciated


thanks mike

 

[chuckz]

Re: Tilt/trim unit leaks down

There is a fill screw on the side of the resevoir where you fill the system. You bleed it y running it up and down a few times. Check the opil level and refill if necessary.

 

[RRitt]

Re: Tilt/trim unit leaks down

There is a fill screw on the side of the resevoir where you fill the system. You bleed it y running it up and down a few times. Check the opil level and refill if necessary.

yup. zactly. use a old school diner style katsup bottle to squirt 30w NON-DETERGENT motor oil into the hole. As you go up and down the bubbles pass through the reservoir and float to the top.