Great Planes Yak-55M 50-55cc Sport / 3D ARF - GPMA1230 - Manual (Page 19)

19
Pitts Style Muffler Installation
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1. Remove the two covers from the bottom of the fuselage.
If you will be using the muffl er that came with your engine
or using a Pitts style muffl er, permanently glue the covers
to the fuselage. If you have thoughts of changing between a
Pitts style muffl er and a canister, you might choose to glue
the covers in place with silicone. This would allow the covers
to be cut loose at a later time.
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2. Mount the muffl er to the engine. Be sure the spark plug
lead from the ignition module is not contacting the muffl er.
Canister Muffler Installation
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1. Remove the two covers from the bottom of the fuselage.
These two covers allow you to customize the fuselage for your
choice of muffl er, canister or tuned pipe. For a canister, glue
the rear cover in place to the fuselage.
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2. The kit includes 4 plywood canister/pipe holder and one
24" [610mm] piece of silicone tubing. For the canister you will
be using two of the holders. From the 24" [610mm] silicone
tube, cut eight 1/2" [13mm] length tubes. (The remaining
holders and silicone tubing are for use with the installation of
a tuned pipe). When choosing the plywood holders, notice that
one is slightly taller than the other. You will need one of each.
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3. Insert eight silicone tubes onto the tabs in the two plywood
holders as shown.