Great Planes Yak-55M 50-55cc Sport / 3D ARF - GPMA1230 - Manual (Page 16)

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you drilled. (13/64 [5.2mm] is required as a clearance hole for
a 10-24 bolt. If you are mounting a different engine, be sure to
check the size of the mounting bolts before drilling the holes).
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3. Install the fi ber servo arm to the carburetor of the engine.
Install a 2-56 ball link and secure it with a 2-56 nut on the
throttle. If you will be using our choke method, then install a
ball and nut to the choke as well.
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4. Using the hardware with the engine, mount the engine
to the fi rewall.
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5. Cut one half off of one of the two nylon ball links included
in the kit. Snap the nylon link that you cut onto the choke
and the remaining nylon link onto the throttle. Use the links
as reference and mark the fi rewall where the pushrods will
pass through. Drill a 3/16" [4.8mm] hole through each of the
marks. If you have an extended drill bit you can do this without
removing the engine. If not you will need to remove and then
reinstall the engine.
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6. Locate two 1/4" x 3/8" x 3/4" [6mm x 10mm x 19mm]
hardwood blocks. Glue them in place over the choke servo
opening as shown.
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7. Mount the throttle and choke servos as shown here. If
you are not using a choke servo you can mount the throttle
servo in either of the two openings.
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8. Locate the plywood guide tube support and two 12"
[305mm] gray plastic pushrod tubes. Roughen approximately