Zenoah 20Cc Engine Preparation - Century Radikal G20 Instruction Manual

ZENOAH 20CC ENGINE PREPARATION

It is not so apparent how the propeller hub is attached to the engine.
A 13mm lock nut is supplied in the kit to aid in the removal of the
propeller hub.
Install the supplied 13mm locknut and tighten down onto the shaft.
Because you have no use for the propeller hub, you can use a wrench
or vice to grab onto the hub while trying to undo the stud. Grabbing
onto this aluminum hub may damage the hub but it's of no use in this
build. Once this stud is loosened, you can remove the propeller hub.
First undo the nut and remove the propeller washer. Screw down
the original nut onto the stud followed by the locknut.
Tighten down on the top lock nut while applying opposite force (un-
screwing) to the second nut using the Zenoah supplied wrench.
This will allow you to lock the nuts together.
Remove the stud and hand tighten it a few threads into the crank.
With the propeller hub still in the vice, gently tap on the head of the
stud with a hammer while supporting the engine with your other
hand. This will loosen the hub from the crank shaft.
MAKE SURE NOT TO LOSE THIS KEY! It is very important to retain this
key for the following steps. Without this key, you cannot mount your fan
and clutch assembly. After you have removed the hub, remove the bot-
tom plate and flush head cap screws. Set these aside as you will not be
needing them for the rest of the build.
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Radikal Gasser