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SPECIFICATIONS
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Displacement
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.40
Cu. In. (6.44cc)
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Bore
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.840
(21.3mm)
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Stroke
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.720
(18.3mm)
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R.P.M.
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2,200
- 18,500
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POWER
OUTPUT
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1.8
HP @ 18,500
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Weight
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15.4
Oz. (.44Kg)
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Propeller
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10
X 6
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Part
No. 4050
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WARNING
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PLEASE
READ ALL SAFETY
INSTRUCTIONS! Failure to read, understand and follow
these instructions could result in personal injury and/or
property damage to yourself or others.
Take
a few moments to familiarize yourself with the various parts
of the engine. DO NOT DISASSEMBLE YOUR ENGINE! Doing so will
void your warranty. No exceptions!
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BREAK-IN
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| Due to
the nature and design features of the “ABC” type engine,
the piston and sleeve have been set up to feel a little tight
at the top of the stroke. Once the engine has been started,
the sleeve will pull away from the piston leaving the exact
clearance necessary for maximum performance without seizing.
It is for this reason that an “ABC” type engine does
not require prolonged break-in periods. However, we do recommend
that you run the engine at a slightly rich needle valve setting
for the first two flights. These flights should be made for
periods of not less than five (5) minutes each. Typically, an
engine will be ready for continuous throttle and a steady needle
valve setting after ten (10) to fifteen minutes. |
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ENGINE
AND FUEL TANK INSTALLATION
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The engine
may be installed upright, on either side, or inverted (upside
down). The 1/4-inch diameter output shaft mounts standard
hole-size propellers.
Mount
the engine firmly to hardwood rails, or to the firewall, if
you use a radial mount. For maximum security, use carbon steel,
self-locking hex nuts and hardened alloy steel machine screws
to mount the engine. The fuel tank size, location, and height
have a great influence on engine operation. For carburetor
engines, locate the tank so that its horizontal centerline
is from 1/4” to 3/8” below the fuel connection to
the carburetor.
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TUNED
MUFFLER SYSTEM
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| As you
attach the muffler and muffler adaptor to the engine, please
note that the muffler screws are different lengths. The longest
screw goes on the front (propeller) end of the muffler assembly.
The pressure fitting on the muffler is connected to the pressure
inlet on the fuel tank. |
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GLOW
PLUG
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| This engine
is designed to use the Long Reach Glow Plug (K&B P/N 7311)
or the K&B 7300 HP glow plug for performance fuels. |
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FUEL
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We recommend
using K&B 500 (12-1/2% nitro).
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PROPELLERS
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| A 10x6p
propeller is recommended as a starting size. However, experimenting
with one pitch or diameter larger or smaller can improve results
for your particular airplane. |
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OPERATING
INSTRUCTIONS
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If you
are unfamiliar with this line of carburetors or are a new
modeler, please do not attempt to start the engine until you
have read and understand the following instructions:
1. NEEDLE
VALVE SET-UP - Locate
an area to install the remote needle valve assembly. This
assembly must be in the fuel line between the
tank and the carburetor. The line should not exceed five (5)
inches in total length.
2.
LINKAGE SETUP - Notice
the barrel will rotate 360 degrees. Using your radio and trim
functions, set the barrel movement for full open and full
close. IMPORTANT: THE BARREL MUST CLOSE
IN A CLOCKWISE ROTATION. The opening in the barrel
spraybar faces the crankshaft.
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NEEDLE
VALVE ADJUSTMENTS
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Note
that there are two fuel metering adjustments:
1. HIGH-SPEED
NEEDLE VALVE - This
needle valve, located on the Remote Needle Valve Assembly,
controls all the fuel that comes to the engine, whether the
engine is running at high, mid-range, or idle speeds. It does
not affect the low speed rich/lean setting. The High
Speed Needle Valve’s main function, however, is to meter
the high-speed fuel mixture. WARNING:
DO NOT RUN THE ENGINE AT A “LEAN” SETTING.
2. LOW-SPEED
and MID-RANGE MIXTURE ADJUSTMENT - The
rich/lean adjustment is controlled by the “slotted”
screw located on the side of the carburetor where the low
speed disk is housed. The rich/lean mixture control is set
at the factory and may require only a "fine” adjustment
for your application. To adjust the mixture, loosen the bottom
screw (do not remove) an adjust the top slotted screw. This
screw only turns 1/4 turn to either the right or left or center.
It does not turn all the way around. Turn the screw clockwise
to “lean” the engine and counter-clockwise to richen
the mixture. After adjusting the mixture, remember to “lock”
it into position by tightening the bottom screw.
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NEEDLE
VALVE ADJUSTMENTS - GENERAL
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| As a starting
point for the high speed needle adjustment, completely close
the needle valve (clockwise), then open it (counter-clockwise)
three and a half turns. This setting is an average and may require
further adjustments. For higher altitudes (3,000 - 4,000 feet),
close needle valve approximately 1/2 turn. |
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