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SPECIFICATIONS
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| Displacement |
.9123
Cu. In. (14.9cc) |
| Bore |
1.100
(27.94mm) |
| Stroke |
.960
(24.38mm) |
| R.P.M. |
2,000
- 22,000 |
| POWER
OUTPUT |
4.8
H.P. @ 22,000 |
| Weight |
23
Oz. (652g) |
| Propeller |
P-260 |
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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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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:
The
carburetor enables easy adjustment of the idle speed, idle
mixture and the high speed mixture.
1.
Mixture Control (High Speed Needle Valve) Assembly
This
engine comes with a servo actuated servo mixture control.
Should you desire to use a standard Needle Valve Assembly,
return your new, unused Mixture Control Assembly and we
will replace it with a standard Needle Valve.
2.
High Speed Needle Valve Adjustment
This
needle valve, located on the Mixture Control 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.
When
preparing to use the Mixture Control, open the High Speed
Needle Valve three and one half (3-1/2) to four (4) turns,
unscrew the plastic body from the aluminum housing one (1)
full turn and connect the servo linkage. Adjust the servo
arm on the Mixture Control to best suit your needs for the
engine operating range you require. The High Speed Needle
Valve is for course adjustment and the servo arm is for
fine adjustments.
3.
Low Speed and Mid-Range Adjustment
The
rich/lean adjustment is controlled by the brass low speed
disk located on the side of the carburetor. Use an allen
wrench to turn the disc clockwise to “lean” the
mixture and counter-clockwise to “richen” the
mixture. 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.
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PRESSURIZED
SYSTEM
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| All series
“94” carburetors must run with exhaust pressure from
the pipe to the fuel tank. |
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PROPELLERS
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It
is difficult to recommend the propeller for your particular
boat, as much depends on the nitromethane percentage fuel
you may use. Propeller depth, and strut angle are also important
factors. However, as a start, the following will have you
in the ball park:
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Hydros
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Prather
No. 270 |
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Deep
Vees
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Prather No. 260 |
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Tuned
Pipes
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Prather
No. 9040 or Mac’s No. 1290 |
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ENGINE
OPERATION TIPS
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GLOW
PLUG: This engine is designed to use an H.P. Long Reach
Glow Plug (K&B P/N 7300).
FUEL:
We recommend using K&B 1000+,
25% nitro.
HEAD
SHIMS: The head clearance of your engine has been checked
and set as close as possible to 18 thousandths of an inch.
A shim may have been installed under the head to achieve this.
Please replace them should you need to disassemble the engine
for any reason.
REMEMBER:
Check all bolts on engine for tightness after each run.
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©2008-1998
Model Engine Corporation of America, All rights reserved.
K&B and the oval logo are Registered Trademarks of Model Engine
Corp. of America
Registered U.S. Patent Office
No
part may be reproduced without written permission from
MECOA/K&B -- P.O. Box 98 -- Sierra Madre, CA 91025 U.S.A.
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