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Tilt Assist Cylinders

mill686

mill686

Regular Contributor
Me again. Hoping to earn my marine mechanic certificate after all of your help. Anyway...How do you bring these back to life?
 
Depending on the exact model some can be rebuilt others are "throw away and replace" -

In the last 20+ years Merc has not build a "manual" trim assist, either their gas or hydraulic models, that can be serviced - if they give up, they are junk (and at last look the gas assist for a 40 horse was listing for about 1400 bucks).

The power units can be rebuilt with kits and valves etc, so depending what you have you may or may not be in luck..
 
I can not find any listing at all for a rebuild kit for these things. As I stated above many were simply a "full replace". They were pressurized and sealed at the factory with "no user serviceable parts" - short of finding a replacement from a recycle place (or spending incredible bucks for new), unless it's really a problem it's something that you may be able to live with...
 
galamb said:
Depending on the exact model some can be rebuilt others are "throw away and replace" -

In the last 20+ years Merc has not build a "manual" trim assist, either their gas or hydraulic models, that can be serviced - if they give up, they are junk (and at last look the gas assist for a 40 horse was listing for about 1400 bucks).

The power units can be rebuilt with kits and valves etc, so depending what you have you may or may not be in luck..
Click to expand...


wait just a minute there .... I agree that the manual assist systems can not be repaired because they are gas charged. Nobody but the factory will have the machine to pressurize the system and therefore nobody but the factory could properly rebuild a manual assist. However, that does not mean they are trash. The manual assist used on 30-90HP can be upgraded to a power trim system. With a full trim pump there is no need to pressure charge the system. Mercury used the same basic rams and pumps across three different brands - Mercury, Mariner, and Force. Some experience is needed because the upgrade is not covered in any manual and I don't think there is a parts diagram anywhere showing how. But if you do the upgrade at the same time as a rebuild then you get a new trim system for $300-$400.
 
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We are talking about a 1984 50 horse model here. The 50 went through numerous changes - gas shock, hydraulic fluid, then back to gas in the "manual" shocks.

The oem part for that model of 50 isn't even on the books anymore.

So, no, that particular shock can not be repaired OR replaced with the original.

Might something else work - maybe - might need a little jury-riggin', but even so the "available" OEM shocks from Merc list at 1400 bucks.

Maybe an aftermarket kit? would have to look around.

This here is the old "totally sealed" system that does not allow for the addition of the hydraulic pump upgrade - so yes, in this case, at this point they are simply "decorations" which can not be repaired or modified....
 
mill686 said:
Me again. Hoping to earn my marine mechanic certificate after all of your help. Anyway...How do you bring these back to life?
Click to expand...

Exactly What are the functions of those shocks. On my 19 merc 650 they are hard to extend but compress vereasily?? I would have thought it shjould be reverse where whne attempting to lift/tilt the engine they would assist making it easier to tilt it and when dropping down into the run position they would slow it down so it wouldn't slam down on the transom?? Help
 
Exactly What are the functions of those shocks. On my 19 merc 650 they are hard to extend but compress vereasily?? I would have thought it shjould be reverse where whne attempting to lift/tilt the engine they would assist making it easier to tilt it and when dropping down into the run position they would slow it down so it wouldn't slam down on the transom?? Help
 
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