Hi everyone Iam building a tiger moth 120 and using A dle 20cc engine my problem is the muffler exaust tube is to short to go thur the cowling by about 2 inches is there away to add a piece of hose on the exaust pipe the wont melt are should I just cut a large hole in the cowl and hope the exaust goes thru what would you all do( also no room for a wrap around muffler do to where the ignition box is located on the fire wall) michael

1/2" female copper pipe fittings are a really nice slip fit on that outlet if that's any help. -Al

I use heater hose from the auto store with a hose clamp. Could also use the silicone types for glow engines.

Mc Master Carr carries silicone and teflon tubing that will work fine. Suggest you drill and tap the exhaust stinger at the end for 4-40 button head screws. Put a couple 1/8" button heads on it and then slide the tube over them and secure with a tie wrap

how do you hold the copper pipe on

I use a thin coat of the same silicone I use to seal the muffler to the exhaust port and a couple of small sheet metal screws installed 180 degrees apart. It's never come off or loosened to date!

That must be red or black high temp silicone rubber.

guess ill try the copper tubing and see how that works out michael

I tried using high temp silicon hose but the gas exhaust fumes kept eatting into the silicon and splitting it. I now use a rubber radiator hose from the auto parts store. It already had a couple of 45 degree bends in it and is a snug firt on the end of the stinger with a plastic tie for good measure. I am running a DLE20 with the noisey stock canister muffler, but the hose extension has quietened it down alot.