Tilt Trim Assembly for 98 merc 75 HP

[Dutch]

1 hour ago, dtrs5kprs said:

Is that the deal in the Merc trim system that uses the little ball bearing looking doo dad? 

I don’t have a clue, but I sure do like your terminology.  I’ll bet it is jill flirted.

[dtrs5kprs]

17 minutes ago, Dutch said:

I don’t have a clue, but I sure do like your terminology.  I’ll bet it is jill flirted.

Wrench will no doubt correct me, but I think it is. Had one go out on my college boat close to 30 years ago. Paid to have it "fixed".

Went out again when I put it on the trailer after Day 1 of an Iowa Federation state tmt. One of my club guys had done one on a duck boat, and we fixed it in the parking lot of a motel, with him chain smoking by flashlight. 

If it's the same deal, there's a little hole that a "ball" fits into to close it. Genuine PITA.

[fishinwrench]

1 hour ago, dtrs5kprs said:

Is that the deal in the Merc trim system that uses the little ball bearing looking doo dad? 

Not sure which circuit you're referring to, but there are several ball & spring valves in the trim pump assembly.    

Mercury's problem is that the ball/spring responsible for the leakdown is pressed into a recess, and is a nightmare to remove and replace without damaging the pump housing.     Flat rate is something like 4.2 hours, so unless you can get someone to do it for 10.00/hr. you are better off just replacing the entire assembly.  

[dtrs5kprs]

18 minutes ago, fishinwrench said:

Not sure which circuit you're referring to, but there are several ball & spring valves in the trim pump assembly.    

Mercury's problem is that the ball/spring responsible for the leakdown is pressed into a recess, and is a nightmare to remove and replace without damaging the pump housing.     Flat rate is something like 4.2 hours, so unless you can get someone to do it for 10.00/hr. you are better off just replacing the entire assembly.  

Yep. That's the animal. Or animals, I guess. Nightmare is quite accurate.

Oddly enough, it worked well the rest of the time I owned it. 

[fishinwrench]

11 hours ago, dtrs5kprs said:

Yep. That's the animal. Or animals, I guess. Nightmare is quite accurate.

Oddly enough, it worked well the rest of the time I owned it. 

Yes I was successful the ONE time I did it.   But there are much easier ways to make 500 bones......So I'm not ever doing it again, and hope you never have to either.  😅

[fishinwrench]

Just get it over with.   

You can have it for cost+ 20.00

Notice there's no core value !  😂

[MrGiggles]

20 hours ago, fishinwrench said:

Just get it over with.   

You can have it for cost+ 20.00

Notice there's no core value !  😂

Just about be worth it to leave the junker on there and throw on a CMC setup.

[dan hufferd]

On 4/5/2021 at 9:51 AM, dtrs5kprs said:

Is that the deal in the Merc trim system that uses the little ball bearing looking doo dad? 

Here are some pictures from my trim repair, I hope this will help others to understand at least part of the mechanicals. If you have an understanding of hydraulics, it's a pretty basic little pump. If not, I would hire someone.

Something that is very note worthy, knowing what to ask for, is half the battle. 

There are a couple small springs that go behind the needle valves, not shown.

Shown one badly worn needle valve that allowed pressure to bleed off.

Good luck 

 

[Targa98]

On 3/27/2021 at 10:46 PM, dtrs5kprs said:

Wrench might have an idea.

My skills are limited, but I'd try a boatload of JB Weld before I replaced it.

FYI, JB Weld did nothing basically. Used the highest PSI I could find. Pic 1. The other pick is after i refilled reservoir and tried to run up and down then refill again. Went back one of the times and you can see the white looking straight lines on the left of the JB weld. That was liquid coming straight through looking just like the crack. Disclaimer: 1st time I've used JB weld but I thought I'd done it correctly and i applied it over 1 week before i tried to do anything with it.

[fishinwrench]

JB Weld is great for a filler on corroded or damaged surfaces, but it has no tensile strength.