Instruction manual

Robinison 22HP Manual
27
With the narrow space between the mechanics and
the fuselage, it is recommended to install the scale
muffler Century has designed for scale fuselages.
Attach the muffler to the engine with the screws
provided with the muffler (Tip 1- using hi-temp
threadlock). Attach the pressure tap to the top of
the muffler, remember to use hi-temp RTV sealer or
threadlock on these parts. Route the return fuel line
below the engine.
Optional
#CN3059 - 46/50
Scale Muffler
Not Included
For a good seal between the muffler and the exhaust port, use a gasket made from thin
aluminum, brass or exhaust gasket material. To properly seal the fit, after running the
engine for several minutes on the first run, shut down the engine and re-tighten the
bolts, while the engine is still hot. The extra 1/8 to1/4 turn on the bolts will seat the muffler in
place. Do not strip the holes!
Step 40 Muffler Attachment
The left side of the fiberglass cabin needs to be ground out for the exhaust
pipe to clear the body. We have listed a hole size that is larger than the
tube as we also suggest that an exhaust deflector is used to keep the gases
away from the inside of the cabin.
14mm
16
10
R8mm
Bottom Right
Edge of Cabin
Step 41 Fuel Filter & Cutoff
If you have not completed the fuel lines, do so now and
connect the pickup line (with clunk attached inside fuel
tank) to a fuel filter (optional) and then connect the filter to
the carburetor fuel inlet just below the needle valve.
Connect the vent line (tube to top of fuel tank) to the
pressure fitting on the muffler and route the vent line
through the frames without touching any gears.
To make fueling easier inside the cabin, we recommend
Century’s #CN2286, which includes the 3 way fuel filter,
the fuel line cutoff and plug and the fuel filter mount. This
simple and convenient optional accessory will allow you to
close the fuel line to the carb to pump fuel in the fuel tank.
Once full, close the fueling line and when you are ready to
start the engine, open the cutoff, restoring fuel the carbure-
tor.
Optional
#CN2286 - 3n1 Fuel
Filter, Cutoff & Mount
Not Included
The fuel filter has fuel flow direction that is correctly installed when the oring is closest to the
carburetor. This ensures that the filter screen stops any particles of dirt from entering the
carburetor. It is also recommended to use a filter on the pickup line inside the gallon of fuel.
Optional
CN2153
Throttle
extension
installed.