User Manual

3
Introduction
Congratulations on purchasing a Zenoah
™
engine. Cared for properly, these high-quality, finely crafted engines will offer many years of reliability.
This instruction manual has been developed to ensure optimum performance from the Zenoah engine you have purchased. It’s important that the instructions
are read thoroughly prior to mounting and running the engine.
Support Equipment
The following items are not included with your Zenoah engine but are neces-
sary for operation.
Fuel—Mix gasoline and 2-stroke gas compatible oil at a mixing ratio of
25–40:1.
NOTICE: Always use a gasoline-resistant fuel tubing (do not use any
silicone rubber tube). Never use any alcohol fuel or alcohol-added fuel, as
this will damage the rubber part of the carburetor.
Propeller—Refer to the Propeller Selection Chart located on Page 8 to
determine the best initial propeller for your particular application.
Manual or Electric Starter—For manual starts, a chicken stick is highly
recommended. Never use your fingers to start any model engine as you
could be injured. If you must hand-start a gasoline engine, be sure to protect
your hand with a heavily padded glove. There are a variety of heavy-duty
electric starters on the market that can be used.
Mounting the Engine
Make sure the engine is mounted on the aircraft using aircraft-grade
plywood that’s at least 6mm in thickness for the G26 engine, and 10mm in
thickness for the G38 through GT80 twin, or a mount of equivalent strength.
Make sure it’s firmly mounted with 4 bolts.
1. Be sure to set flat washers or a metal plate on the reverse side of the
mount to prevent the bolts from sinking into the mount. Periodically check
the engine mount for loose bolts.
2. Since the engine is equipped with a floatless carburetor with a diaphragm
pump, the direction of the cylinder and position of the fuel tank can be
freely selected.
3. If the engine is mounted on a shock (rubber) mount placed between the
engine and the firewall for anti-vibration, check the hardness of the rubber,
making sure it’s not too soft, in order to avoid excessive vibration during
engine operating rpms. If the engine is vibrating at idle, check the overflow
at the carburetor. Excessive vibration can result in erratic engine operation.
4. Coat the muffler bolts with threadlock when mounting the muffler to
the engine.
Evolution
®
Oil (EVOX1001Q)