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dle 20 cc muffler extention

Old 10-09-2012, 05:07 AM
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michael wood
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Default dle 20 cc muffler extention

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
Old 10-09-2012, 05:15 AM
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ahicks
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Default RE: dle 20 cc muffler extention

1/2" female copper pipe fittings are a really nice slip fit on that outlet if that's any help. -Al
Old 10-09-2012, 06:41 AM
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Default RE: dle 20 cc muffler extention

I use heater hose from the auto store with a hose clamp. Could also use the silicone types for glow engines.
Old 10-09-2012, 08:00 AM
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MTK
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Default RE: dle 20 cc muffler extention

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
Old 10-09-2012, 08:16 AM
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michael wood
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Default RE: dle 20 cc muffler extention

how do you hold the copper pipe on
Old 10-09-2012, 06:47 PM
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ahicks
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Default RE: dle 20 cc muffler extention

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!
Old 10-09-2012, 07:50 PM
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Ernie Misner
 
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Default RE: dle 20 cc muffler extention

That must be red or black high temp silicone rubber.
Old 10-09-2012, 08:48 PM
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michael wood
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Default RE: dle 20 cc muffler extention

guess ill try the copper tubing and see how that works out michael
Old 10-15-2012, 12:57 PM
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Default RE: dle 20 cc muffler extention

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.

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