wingburner

My Feedback: (17)

Hi guys,I have a friend with a 3W 75ius that seems to be leaking fuel from the base of the carb reed block.It may also be leaking between the carb and the block...I know there has been much discussion on this and I've looked but can't seem to find it....

Can anyone help

Thanks Jack

Antique

My Feedback: (4)

I use Permatex Ultra Copper or Three Bond 1104 grey sealer...Don't let it get in the pulse hole...

DMcQuinn

My Feedback: (13)

Remove the phenolic block from the carb and the motor. Use some sandpaper on a flat surface (glass, etc.) and sand the mating surface until it is flat again (it is probably warped). Then re-attach it and do not torque it down too tight. Also, make sure from this point on that the engine is not running too hot or it may warp again. Use proper baffling in the cowl and do not run the engine lean.

Kweasel

My Feedback: (29)

If the surface is flat enough I like Loc-tite 518. If there is a large gap to fill then Permatex Ultra Copper is easy to find and somewhat gasoline proof. Fuel tank sealant used on Jet aircraft is is the very best rubberized sealant available, its just more difficult to find and a little expensive.

wingburner

My Feedback: (17)

Thanks guys,you have helped immensely.

gpw4653

My Feedback: (118)

Hi guys, how long do you wait to aasemble the block and before you run the engine when using loctite 518, thanks Gerald

Kweasel

My Feedback: (29)

I wait at least 24 hours.

blackbaron

My Feedback: (92)

I will second Ralph on that one. That is similar to what I use. You can use most any automotive grade gasket sealer, just make sure its gasoline resistant. I like the plain black high temp permatex. Its easy to clean up too.