Tilt Trim Assembly for 98 merc 75 HP

[Targa98]

My housing that holds the Ram for my Trim has cracked.  The motor still works but I am lokking to replace the unit.  Anyone got any Leads as to where a guy might find some thing like this used?

[beadhead]

Check ebay.

[dtrs5kprs]

6 hours ago, Targa98 said:

My housing that holds the Ram for my Trim has cracked.  The motor still works but I am lokking to replace the unit.  Anyone got any Leads as to where a guy might find some thing like this used?

Wrench might have an idea.

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

[fishinwrench]

1 hour ago, dtrs5kprs said:

Wrench might have an idea.

Yes I do..... but as usual Mercury Marine snuffed it.    They want you to scrap the old 75 and buy their new 4-stroke.   

 

And then in 6-7 years they'll do the same to your 2021 unit.   

Dirty rotten basturds!   🙄

[Targa98]

wrench was the 1st person I went to when it happened.  Merc wanted dang near a grand for a whole new assembly and for an older boat like this it is just hard for me to do when I am in the works to buy a bass boat later this summer.

[dan hufferd]

On 3/27/2021 at 4:12 PM, Targa98 said:

My housing that holds the Ram for my Trim has cracked.  The motor still works but I am lokking to replace the unit.  Anyone got any Leads as to where a guy might find some thing like this used?

Why do they crack? Water contamination?

Mine is the same model or very near it 2004 merc 75hp 2 stroke

 

[fishinwrench]

13 minutes ago, dan hufferd said:

Why do they crack? Water contamination?

The pressure relief valve in the pump body (designed to save the motor should you hit an object while underway)  sticks closed and fails to allow fluid to bypass the cylinder.  Excess pressure builds up and something has to give.     In this case it is the 1/8" thick cast aluminum ram housing. 

Therefore just replacing the ram housing is not THE FIX..... because it will just bust another one.    

You would have to overhaul the pump assembly as well (which flat-rates at 4.7 hours+ R&R).  So Parts + Labor exceeds the cost of a complete tilt/trim assembly.   

[dan hufferd]

On 3/30/2021 at 9:50 PM, fishinwrench said:

The pressure relief valve in the pump body (designed to save the motor should you hit an object while underway)  sticks closed and fails to allow fluid to bypass the cylinder.  Excess pressure builds up and something has to give.     In this case it is the 1/8" thick cast aluminum ram housing. 

Therefore just replacing the ram housing is not THE FIX..... because it will just bust another one.    

You would have to overhaul the pump assembly as well (which flat-rates at 4.7 hours+ R&R).  So Parts + Labor exceeds the cost of a complete tilt/trim assembly.   

I understand, I repaired the valves on mine. 

Mine was drifting down though, so it's probably a different valve.

I didn't realize that there was a detent valve for impact, that's good to know. Thank you again 

[fishinwrench]

6 hours ago, dan hufferd said:

 

Mine was drifting down though, so it's probably a different valve.

Yeah the leaking down issue is yet another Mercury exclusive.   They coulda/shoulda rectified that 25-30 years ago.   But once again have elected to just let it slide.  🙄 

You'll never see an Evinrude, Yamaha, Nissan/Tohatsu, or even a Honda trim system leaking down.   But 95% of Mercs do it, and there really isn't a reasonable fix other than replacing the entire trim pump assembly with another that will also eventually do it too.  

[dtrs5kprs]

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