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Mercruiser. Yup, beware. Manufacturing issues.

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Mercruiser. Yup, beware. Manufacturing issues.

Old 06-04-2020, 09:05 AM
  #11  
SB
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New Riser is perfect. (New risers and manifolds where purcchased.)
Gasket matches to it, old manifold, and old riser absolutely perfect.

Manifold is casted wrong.

I made them aware of it.

They looked into it and agreed. How can you not. It's fuked.

They said will change casting, engineering plans have been changed now, waiting until stock runs out and new run to make changes.

Reason why I noticed it, vs others is by chance. it was end of day, i was very tired. I work on stuff all day and getting old. Had one side completely installed. Secoond side I installed studs to keep risr/gasket straight with manifold. I put two studs in, installed gasket, turned to grab riser and then, whoaaah, wait a minute, did I see that ? Yup. Took other side apart, same thing. Checked old stuff. Those where made fine.

Then a god damn mess with Merc and etc. Seemed nice at first, offered replacement until they realized my issue wasn't a one off by complete casting run issue. Now just empty promises. This boat missed all last year on being led to believe issue would be changed quickly and that passed and then by this spring. Not going to keep this boat landlocked another year.

So, anyway, whoever bought these manifolds last few years or are ready to buy, BUYER BEWARE.

Last edited by SB; 06-04-2020 at 09:10 AM.
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Old 06-04-2020, 04:53 PM
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What motor is that SB

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Old 06-04-2020, 05:26 PM
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Killer 94 305 4bbl Merc 5.0l 225hp
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Old 06-04-2020, 07:49 PM
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LOL, got to love this,

They agree its a issue and a flaw.
They are going to fix it, but not help anyone that bought the junk parts.
Oh and they are still going to SELL all the junk parts first.

Sounds like HD!
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SB (06-04-2020)
Old 06-06-2020, 12:19 PM
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SB just change it over to Dry Joint. You will have to change the thermostat housing over to the type that has the check balls and 2 extra hoses to go to the risers but after that its bullet proof. I have the same motor and it worked great on mine. Another thing is the riser gaskets that have 1 large hole on 1 end and a pee hole on the other end, the hole needs to be drilled out to about 75% the size of the larger hole. Mine has been on there for over 6 yrs. Actually its 8 yrs now.. I am not going to remove, inspect or replace them ever. Its a 98 motor so when they go and the motor goes its time to re power. And it will give us all a life expectancy of the Dry joint Exhaust. And we run 100% in salt. It is flushed after each use and salt away twice a year.

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Old 06-23-2020, 09:34 AM
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Its called core shift in the casting process
If you can find a set of GLM aluminum they are a good replacement I have pair on my jet deck boat been running for 10 years unsalted
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Old 06-23-2020, 10:41 AM
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It's not core shift. I've dealt with that way back when, especially when GM went to Mexico. The lost foam casting for the manifolds was designed (blueprinted) and thus made wrong. Crazy huh ?

This is why there are no good ones. They are all bad.

THanks for info on the GLM. Years back I heard of people here and there having issues with them. Any better ?
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Old 07-08-2020, 07:33 PM
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To the top.

Still nothing satisfactory has happened.
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Old 08-06-2020, 07:50 AM
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Originally Posted by SB View Post
To the top.

Still nothing satisfactory has happened.
Still...so, to the top
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Old 09-20-2020, 01:10 PM
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SB...are they just giving you radio silence now or keep offering but not delivering?
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