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Welcome
to the family of K&B Engines, the name synonymous with
performance
and quality for over 50 years.
To
assure complete satisfaction with your newly purchase engine,
please read the instructions carefully and follow the
steps of proper installation, operation, and care.
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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
- 24,000
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Power
Output
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2
HP @ 24,000
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Weight
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12.8
Oz. (.37kg)
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| Propeller |
P-235 |
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Part
No. 4075
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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's 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 slightly rich needle valve setting for
the first two runs. These runs should be made for periods
of no less than five (5) minutes each. Typically, an engine
will be ready for continuous full throttle and a steady needle
valve setting after ten (10) to fifteen (15) minutes. |
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ENGINE
AND FUEL TANK INSTALLATION
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| Mount the
engine firmly to your motor 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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GLOW
PLUG
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| This engine
is designed to use the long reach glow plug (K&B P/N 7311)
or the HP glow plug (K&B P/N 7300) for performance fuels. |
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FUEL
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| We recommend
using K&B 1000+ (25% nitro) or K&B Speed Fuel (50% nitro). |
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PROPELLERS
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Please consult
your hull manufacturer for the best propeller for your application. |
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CARBURETOR
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 close. IMPORTANT: THE BARREL
MUST BE 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.
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. WARNING:
DO NOT RUN THE ENGINE AT A "LEAN" SETTING.
To adjust the mixture, loosen the bottom screw (do not remove)
and adjust the top slotted screw. This screw only
turns 1/4 turn to either the right or left of center.
It does not turn all the way around. Turn the screw
clockwise to "lean" the engine and counter-clockwise to
"richen" the mixture.
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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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