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-   -   Broken Exhaust Dam Flapper (https://www.offshoreonly.com/forums/general-q/386792-broken-exhaust-dam-flapper.html)

boatnt 11-01-2025 09:13 PM


Originally Posted by Brad Christy (Post 4937669)
Ryan,

Not yet. I figured the heat wouldn’t be less of a chance for physical damage. It doesn’t look like there’s any gap to get anything under there, but I’ll give it a shot.

https://cimg9.ibsrv.net/gimg/www.off...0ee7ac058f.jpg
Something like this?

Thanks. Brad.

no, try a wood shim like the type you use when you shim a door

Tartilla 11-02-2025 01:24 AM


Originally Posted by boatnt (Post 4937674)
no, try a wood shim like the type you use when you shim a door

You need a really shallow wedge. Mechanical advantage and thinner to get in between the gelcoat and stainless. Medium hard...soft enough to not damage, hard enough to not just get smashed like a piece of balsa and let the wedge work.

bencini231 11-02-2025 04:00 AM

This is my go to when working with adhesives. I've had parts sealed with 5200 and they came off very easily after using debond.


Rookie 11-02-2025 10:24 AM


Originally Posted by Brad Christy (Post 4937554)
BoatNT,

Any good tricks to getting the tips out of the transom? I've got the screws out. From the looks of the gumpuckey on the screws, it doesn't appear to be anything crazy, but they aren't budging, even with a pretty good whack with a dead blow hammer from the inside.

Thanks. Brad.

Post 8 is all the tools I used to remove everything off the back of my transom. The mortar tools helped. lol
Heat and solvents were no avail.
https://www.offshoreonly.com/forums/...uild-help.html

Brad Christy 11-02-2025 10:35 AM


Originally Posted by bencini231 (Post 4937676)
This is my go to when working with adhesives. I've had parts sealed with 5200 and they came off very easily after using debond.

Amazon.com: Debond Corporation MF5UMP Marine Formula - 5 oz. : Industrial & Scientific

Bencini,

I’ve seen this stuff talked about out before. I don’t think I’m dealing with 5200. Is that stuff specific to 5200, or will it work on other stuff? 4200, silicone, etc….?

ICDEDPPL 11-02-2025 01:17 PM

Was the flapper stuck causing a restriction you think?
Sorry you have to pull the engine again that's never fun.

Padraig 11-02-2025 01:29 PM

  • Recommendation
    Gelcoat
  • Cured 3M 5200, polysulfide sealants and other polyurethane adhesives
  • Removes caulks, sealants, black rub marks, adhesive residue, liquid nails, graffiti and overspray
  • Cleans adhesive film from duct and masking tape
  • Will not harm: Gelcoat, Clear Coat, Plexiglass, AwlGrip or Imron
  • 5 oz. aerosol can

Brad Christy 11-02-2025 05:15 PM


Originally Posted by ICDEDPPL (Post 4937711)
Was the flapper stuck causing a restriction you think?
Sorry you have to pull the engine again that's never fun.

Dan,

No idea. Never thought about it. Maybe. Don’t think it was broken when I was spending all that time in the bilge over last winter. We weren’t monitoring the even bank for AFR. We might know if we had.

https://cimg2.ibsrv.net/gimg/www.off...6ca670f91.jpeg
Engine’s out. It won’t take me but a couple hours to do the work I actually pulled it to do, but I’m talking with the tuner about a cam swap while I’ve got it out. So I’m gonna hold off until I get that sorted out.

Thanks. Brad.

Brad Christy 11-02-2025 05:18 PM


Originally Posted by Padraig (Post 4937712)
  • Recommendation
    Gelcoat
  • Cured 3M 5200, polysulfide sealants and other polyurethane adhesives
  • Removes caulks, sealants, black rub marks, adhesive residue, liquid nails, graffiti and overspray
  • Cleans adhesive film from duct and masking tape
  • Will not harm: Gelcoat, Clear Coat, Plexiglass, AwlGrip or Imron
  • 5 oz. aerosol can

Padraig,

I may have to check that stuff out. If for no other reason, I’ve got a some black rub marks from where I got into the dock at Connelly while I was figuring out that the shift cam in the outdrive had broken.

Gonna order a can.

Thanks. Brad.

Padraig 11-02-2025 06:25 PM

I've never used it but it sounds like it may be worthwhile to keep a can in the garage.

Padraig


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