Extreme Flight YAK-54 ARF, Instruction Manual

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Remove the engine and brush a coat of alcohol thinned epoxy onto the
exterior and interior of the motor box. When dry permanently mount the
motor. Be sure to use some large washers behind the firewall to better
distribute the load. Again, use blue Loctite on all bolts.
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Now lets set up the throttle linkage. If you are using a DA-50 this is
very easy. You may need to rotate the carburetor on the DA-50 180
degrees so that the throttle arm is facing the bottom. Please contact
DA for the proper procedure. It is very easy and only takes a couple
of minutes. Mount the servo in the hole in the floor of the engine box
and use the 2mm pushrod and white ball links to fabricate the throttle
linkage. Very easy! If you plan to use a tuned pipe you will need to
install 3/8” hardwood servo rails on each end of the servo hole to raise
the servo so it does not touch the header/pipe. Here are a couple of
pictures showing the DA-50 installation and servo linkage.
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