BARTOLONE ENGINES bb942 Instruction manual

Made in the USA!
General Instructions For Use & Safety: 40cc Big Bore Engine
Thank you for choosing Bartolone Racing Products for your RC needs. We strive to build the
best in class engines in quality and performance. Please read carefully and follow all applicable
safety and tuning guidelines to ensure many hours of trouble-free, safe operation.
Safety:
1) Operation
Due to the size and weight of 1/5 scale and larger RC vehicles, it is recommended to operate
them only in a controlled environment such as a track facility. They should never be driven in
public spaces such as school yards, parks, roads or highways and anywhere crowds of people
may gather, as loss of control could cause grave bodily injury. As an added precaution, we
recommend installing a remotely operated safety kill switch on your new engine prior to
installation in your RC vehicle. Always refer to the manufacturers instructions for use before
operating any RC vehicle.
2) Fuel
Your new engine runs on a 26:1 ratio mix of gasoline and 2-stroke oil. Due to the highly
flammable nature of gasoline, you should never mix, fill or run your engine near open flame or
while smoking, as this could cause the fuel to ignite and cause injury to yourself or others.
Additionally, gasoline powered engines produce toxic carbon monoxide gasses and as such
should only be operated in wide open, well ventilated areas. Failure to do so could result in the
inhalation of the toxic carbon monoxide fumes.

Operating Your New Engine:
1) Fitment
Your new engine is equipped with a Walbro 1107 carburator and a BPMR7A NGK spark plug.
The initial settings on the carburator sould be 2 turns out(top/high end needle) and 1.5 turns
out(low/bottom end needle). Check to ensure the spark plug is tight and the carburator is
adjusted correctly before moving to the next step!
2) Fuel/Oil Mix Ratio
This new engine MUST be run on pre-mixed fuel. We recommend a using 91 octoane fuel and
mixing @ 26:1 or 26 parts fuel to 1 part high end 2 cycle oil such as Redline or Castor 927
3) Initial Start Up
Before attemting to fire up the new engine, close the choke with the black lever, then press the
primer bulb on the carburator 8-10 times ensuring fuel is being drawn into the fuel line and up
to the carburator. The primer bulb should also fill with fuel. Pull the pull start cord 3 times
slowly to draw fuel into the cylinder, then pull 1 time normally to start the enginge. Repeat of
necessary.
4) Break In
Once you have your enginge started, we recommend cycling through 1 full tank of fuel, then
shut the engine off and let it cool down completely. Refill the tank and repeat this process in ¼
tank intervals. Once complete, it should be ready to begin to tune and run.
5) Tuning
*Note* Turning the needles on the carburator in, or clockwise will slow the flow of fuel and
make the engine run lean. Turning the needles out or counter clockwise will increase the flow
of fuel and make the engine run rich. NEVER turn the needles in more than 1 hour (1/12 turn)
at a time and NEVER turn the needles in more than 3 hours total.
Tuning a new engine properly is the key to longevity and many hours of trouble free run time.
Improper tuning can ruin any engine almost immediately. After the initial break in, check the
spark plug to ensure it is not dirty, damaged or fouled. If any of these issues are present it must
be replaced. While tuning, check the spark plug often to check for a lean fuel situation which
could damage the engine. A lean setting will turn the end of the spark plug white, a rich setting
will turn the end of the spark plug dark brown or black. The color of the spark plug in a properly
tuned engine will be almost gold.

6) Maintenance
Check spark plugs often, replace as required. Check, clean and replace air filters often as any
dirt entering the engine due to a dirty or compromised filter may cause irrepirable damage.
Choke Lever
Primer Bulb
Low/Bottom End Needle
High/Top End Needle
Fuel Inlet
Idle Screw

Warranty & Limits of Liability:
Bartolone Racing may @ its’ discretion repair or replace items to have been deemed defective
in material or workmanship. Damage to the product or mating parts caused by improper use,
installation, tuning or runaway situations will not be covered as such under this limited liability
warranty.
Pull Start Cord