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Old 29 April 2013, 04:18   #1
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Tilt ram problem

Morning all,

I have a problem with the tilt ram on my 1993 Yam 85AET: while on tow (i.e. going over bumps etc) it gradually drops to the point where itís on the trim rams. It will raise and lower ok, it just drops slowly but consistently while on tow. I canít see any fluid leaking out from round the seal on the piston though the piston itself is probably wetter than you would expect on a split new unit.

I havenít looked closely at this yet because the problem only manifested itself on the drive back from Anglesey yesterday but does anyone have experience of this or pointers regarding where to look?

Cheers,

Dan
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Old 29 April 2013, 05:01   #2
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God morning

I had a similar problem on our boat many years ago, sounds like a very small leak that is allowing the engine to come down, the weight of the engine and the movement of towing is creating this.

Most outboards have a manual valve under the engine frame linked to the ram and the cylinder to allow you to bleed the fluid when you change this or allow you to lower the engine if there was a problem, it maybe not be fully shut, the electric hydraulic pump will bleed air out when in use and hold the engine steady.

Worth having a look at this valve first before spending any money. hope this helps you
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Old 29 April 2013, 05:16   #3
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Is the tilt support mising on the motor?
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Old 29 April 2013, 05:26   #4
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What is this "tilt support" of which you speak? I'm guessing its some sort of manual lockout type of thing to support the engine so the ram isn't doing it in transit? If so I was unaware that such a thing might exist: ill have a look for it. Would I expect it to engage only in the "fully up" position?
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Old 29 April 2013, 05:36   #5
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I'll see if I have a pic, but I suspect that if you don't know about it, it's fallen off.
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Old 29 April 2013, 05:38   #6
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My 50 yam dose this when I leave it I put the support arm down so the engine dose not drop down as I have had this happen when left on a drying out pontoon!
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Old 29 April 2013, 05:41   #7
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+1 for checking the screw - (and use a BIG blade screwdriver or you WILL mangle the screw slot......) Screw hole can be found bottom right as you look forward.

If you say the ram is wet, there may be a tiny leak on the ram seal.

Now, the tilt support is an expensive bit of bent metal with your engine manufacturer's name on, as you say, to hold the engine up when towing. A big block of wood works just as well!

I have used two variations - on my old Suz I drilled a bit of 3x3, & used the tilt pin to hold it in place at the bottom. Screwed another bit of 2x2 across the top that I shaped to fit the leg, then had a 4:1 with a jam cleat tackle with 2 snap shackles that clipped onto the tilt pin & held it from bouncing.

The Merc I have another bit of said 3x3, but this one wedges in between the clamp & swivel brackets with suitable grooves cut to allow it to engage & sperad the load a bit. Similar lash- down for the leg is used.
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Old 29 April 2013, 05:43   #8
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Circled in red. Not a very good pic, but it's a catch you turn through 180 degrees at fill tilt, then trim down til the engine sits on it.

There should be one on each side, linked via a bar.
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Old 29 April 2013, 05:43   #9
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Quote:
Originally Posted by Nos4r2 View Post
I'll see if I have a pic, but I suspect that if you don't know about it, it's fallen off.

Multiple simultaneous posts...... (Most of this is now a much cropped edit!)

I wouldn't personally trust that tiddly bit of pressed steel for towing... (I also block my Aux up for the same reason)

(Cue debate stage left! )
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Old 29 April 2013, 05:46   #10
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Another simultaneous post
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