Blaster Marine Formula - DeBond vs 3M 5200

[96superjet]

So, I bought a 2004 SJ years ago and shelved the stock 701 motor and dropped in my JM781. I just got around to using parts from it and was unbolting the carbs last night and found they are fused to the intake manifold. I think the previous owners put 5200 on the carb studs. Before I totally destroy the intake or the carbs, has anybody ever used Marine Formula DeBond to break the grip of 5200?

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[Mike W]

I bought a set of new take off 38mm carbs off a 2015-2016 SJ. The screws were a bitch to remove and I thought I was going to snap a couple of them off. It may be something the factory uses. I used a lot of patience and just worked the screws back and forth until I was finally able to get them out. The diaphragm screws were the worst.

 

[96superjet]

I'm talking about the intake manifold studs to which the carbs are bolted. The four nuts came right off, but the base of the carbs are essentially welded to the intake.


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[Harbor]

I think the previous owners put 5200 on the carb studs.

Could it be corrosion from the dissimilar matels of the stud and carb and/or salt corrosion ?

Anyways I guess silicon should be noticeable enough like you've mentioned, I've never used that stuf you found but it looks like the ticket

 

[vcolf]

I have had good luck with PB blaster. Best to get a gallon and soak/submerge the part overnight.


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