Removing risor gaskest, revisited.

[Boomyal]

Replacing aged, crazed boots on my '76 888. One sprung a leak thru one of the zillion cracks on the inside of what appear to be the original connecter boot.

With risors off, upside down in a vise, it was relatively straightforward to razor off the old gaskets (still tougher than nails) then flat file the gasket surface to shiney clean.

Today I tackled the risor mounting surfaces on the manifolds themselves. What a horrible PITA. First you have the studs in the way, second the rear stern shelf is mere inches above the forward edge of the mounting surface. My hands are cramped (and lucky not to be sliced to ribbons) trying to clean the gasket surface off on the manifolds with a razor blade.

After 45 minutes, with vacuum hose in hand so the crap does not fall down into the water jacket or exhaust side, there is still a lot of glued gasket on the surface. And this is just for one of them.

Is there any super gasket remover that I can use? This stuff is like concrete. I suppose I could try removing the studs, but that would probably be difficult. Maybe I could go after it with a 2 1/2" twisted wire cup brush on my 17$ harbor freight angle grinder? I wouldn't want to round of the gasket surface.

 

[Bondo]

Re: Removing risor gasket, revisited.

Re: Removing risor gasket, revisited.

I usually use a Rol-loc disc,+ a diegrinder,......

Your High Dollar Grinder,+ Wirebrush would be My 2nd Choice........
That's what I used Before I got the Air,+ the Tools that go with it.........

Double-Nutting the Studs,+ getting em Out of the way probably would be a Plus............

Btw,....... It's the Boat Builders who keep putting Boat in the way of repairs.............

 

[Boomyal]

Re: Removing risor gasket, revisited.

Re: Removing risor gasket, revisited.

I usually use a Rol-loc disc,+ a diegrinder,......

Your High Dollar Grinder,+ Wirebrush would be My 2nd Choice........
That's what I used Before I got the Air,+ the Tools that go with it.........

Double-Nutting the Studs,+ getting em Out of the way probably would be a Plus............ Good idea, I'll take my PB Blaster over there and give that a try. That would let me get a flat file on the surface to clean up any gasket residue or rust.

Btw,....... It's the Boat Builders who keep putting Boat in the way of repairs............. That's a fact, especially in this case. This little Beachcraft has a lot less room in the back than my Gulfstream. Might I add, less room with a whole lot more Black Anchor Crap back there than my OMC Gulfstream has.

 

[Tail_Gunner]

Re: Removing risor gaskest, revisited.

Geesh you couldnt think your way thourgh that, and you want to race that old sled against my high and tight little cuite??........

 

[Boomyal]

Re: Removing risor gaskest, revisited.

....my high and tight little cuite??........

Thought we were talkin' 'bout boats here TG?

 

[bjcsc]

Re: Removing risor gaskest, revisited.

This is why I use Permatex Hylomar on my gaskets. When I check my risers and replace the gaskets, they lift off intact and I can wipe the sealant off with solvent to reveal a shiny surface on the entire sealing surface, right up to the edges.

 

[Boomyal]

Re: Removing risor gaskest, revisited.

This is why I use Permatex Hylomar on my gaskets. When I check my risers and replace the gaskets, they lift off intact and I can wipe the sealant off with solvent to reveal a shiny surface on the entire sealing surface, right up to the edges.

Sounds good bjcsc, i'll pick up a tube before I reassemble.

 

[Boomyal]

Re: Removing risor gaskest, revisited.

This is very elementary. Kinda like mechanics 101, so I shouldn't have to ask but I will. I double nutted the risor studs and was able to remove 3 out of 8. The rest just spun the double nut set up. I pre-soaked them in PB Blaster but the threads on the ones that came out were very clean. Absolutely no rust. So I assume the other 5 are similar, just that they are very tight.

I thought I would go back with a brass mallet to tap on the remaining studs and or apply some heat with a propane torch to the studs. Does this sound effective?

I'm sure not to get a good clean gasket surface with out removing them. 3M has a gasket remove spray, but I doubt it would work with these gnarly gaskets and their cement.

 

[KaGee]

Re: Removing risor gaskest, revisited.

You got that done yet??

 

[Boomyal]

Re: Removing risor gaskest, revisited.

You got that done yet??:

Huh? Payback time?:redface:

I'd like to see you kneeling down in the back of the boat, with 4" of vertical clearance, over the mani surface and 90 deg of sudden ( it was 60 deg a few days ago) heat blaring down on you. Sweat dripping onto your glasses, busting your knuckles spinnin the wrench around or playing dodgeball with a razor blade.