Advice on Trim and Tilt jumping when going down.

[daselbee]

I am going to post this up for people to read and file away if they want.

I have seen the common problem of the trim and tilt, on V6s especially, chattering or jumping or bouncing when going down.
The whole engine ends up bouncing as it makes it's way to the fully down position.

This occurs on the FastTrack trim and tilt systems. It may do it on the V4's also, but I have not seen that case yet.

The current advise to fix it is to tighten the 1-1/4" tilt tube nut on the stbd side of the tilt tube.
Right....I said TIGHTEN the nut. This creates a very tight tilt tube assembly, and inhibits the bouncing simply by the frictional tightness.

But, here is the problem. I have tightened the tilt tube nut, just enough to where the bounce is controlled, on two different engines.
On both of those engines, at some time later, I have had to replace the trim and tilt motor.

Now, I cannot remember how long between tightening the nut and replacing the motors actually was.

But I have a suspicion that the added friction of the tilt tube assembly from a nut that is tightened will put additional load on the TT motor when going UP, and
cause premature failure.

Just a thought. Maybe some others who have used the method to "fix" their bouncing trim tilt systems can weigh in.

 

[Boobie]

I've used this method for quite a few years just to fix this same problem. Never seen any early t/t motor failures. JMO.

 

[kentv]

This is an old post, old subject, but it's quite common. My engine is bouncing on the tilt down function lately. What is causing that? Also, is that
1 1/4 tilt tube nut even accessible to get a wrench onto it? My boat is in storage, but my recollection is that you can't get to much at all near the tube while the engine is on the boat.

 

[racerone]

Salt water motor?-----Corrosion gets into space around plastic bushings and JAMS the pivot points.-----Easy to inspect / clean in my opinion.