Warning Notes - LRP S8 BX Instruction Manual

MA00163
ORDER NO.:
32171
2.12 HP
30.000 RPM
USER GUIDE
LRP electronic GmbH,
Wilhelm-Enssle-Str. 132-134, 73630 Remshalden, Germany
info@LRP.cc
www.LRP.cc
1. TECHNICAL DATA
Engine size
Exhaust
Bore
Stroke
Liner
Number of ports
Crankshaft
Crankcase
Piston
Connecting Rod
Glowplug
Carburetor LRP PowerCarb 14S-2 slide carburetor with 7mm venturi,
Power Output*
Max. RPM*
Weight
*Figures may vary depending on used fuel, muffler and tuning.
!
2.

WARNING NOTES

• Never leave your RC model unattended when the engine is running. If a fault should occur the
result could be a fire in the model which could destroy anything else in the vicinity.
• All nitro engines produce gases which are very dangerous for your health; one of them is
carbonium monoxide which can lead to death! Always use your engine outdoors or in well
ventilated areas only.
• Nitro engines and their surroundings get very hot. You can seriously burn yourself when you
touch them.
• Never try to stop a running engine with your fingers. Pinch the fuel line or close the top of the
carburetor.
• Not suitable for children under 14 years, this engine is not a toy.
3. FUEL
Never use regular gasoline or airplane fuel. Use fresh 2-stroke model car fuel only! We recom-
mend using our line of LRP high-quality fuels (No. 35710: 25% 1L / No. 35730: 25% 3,5L). For the
LRP Z.21R Spec.2 Pullstart engine we recommend a fuel with 25% nitro. Never exceed 30% nitro.
A higher nitro content will decrease your engine's lifetime.
4. AIRFILTER
A good airfilter is very important for the life of your engine. Never run without an airfilter, as
quick and permanent damage will result! Don't forget to impregnate the airfilter with a suitable
oil before usage. Carefully clean the airfilter at least after every tenth tank. Replace the airfilter
every 3 litres (~1 gallon) of usage.
We recommend the use of our LRP Hi-Flow 2-stage airfilter (No. 36560) together with our LRP
Hi-Flow airfilter oil (No. 36590).
5. GLOWPLUG
Use only standard style glow-plugs for this engine. We recommend using our line of high-quality
LRP Platinum / Iridium glowplugs (No. 35030 - No. 35060, availabe as R3 to R6). Check them
frequently and never run with worn-out or old glow-plugs since they could damage your engine.
They turn dull when your engine was too lean and should be replaced. They should stay bright
like chrome. If the glowplugs wear out too fast, an additional 0.1mm shim between burnroom
and liner is recommended. Whenever you have trouble with the engine stalling for no reason,
replace the glow-plug first!
TIP: Under normal conditions, use a LRP Platinum / Iridium R5 (No. 35050) plug for the LRP
Z.21R Spec.2 Pullstart engine. When using fuel with higher Nitro content or at very hot
days, use a LRP Platinum / Iridium R6 (No. 35060) plug.
36 36
Z.21R SPEC.2
PULLSTART
.21 (3.49ccm)
Rear
16.4mm
16.4mm
ABC
3+1 (3 transfer-, 1 exhaust-port)
SG-Shaft
LRP XXXX .21 Heavy Duty, black coloured
Fully CNC-machined, high-silicium alloy
Fork shaped aluminium using double bushings
LRP Standard style R5 (No. 35050) included
aluminium design
2.12 PS
30.000
410g
Dear Customer,
thank you for your trust in this LRP product. By purchasing a LRP nitro engine, you have choosen
a high-performance and highly sophisticated product, which doesn´t make any compromise
between maximum performance and easy tuneability. The LRP Z.21R Spec.2 Pullstart is the
perfect replacement-tuning engine for your .21 RTR standard engine. We hope you enjoy your
new engine.
Please read the following instructions to ensure, that your LRP Z.21R Spec.2 Pullstart engine
always works up to your full satisfaction.
Please read and understand these instructions completely before you use this product!
With operating this product, you accept the LRP warranty terms.
6. EXHAUST SYSTEM
Never run without a pipe since this will cause excessive overheating and may damage your
engine. A good pipe has a very huge effect on the performance of a 2-stroke engine. For the LRP
Z.21R Spec.2 Pullstart, we recommend using our LRP 1/8 Off-Road Competition exhaust system
(No. 36200) for maximum performance.
7. PULLSTART
Always pull the handle straight and don't let the cord rub on anything. Do not fully extend the
cord as this may abuse and damage the pull starter (using about 2/3 of the complete length of
the cord is enough to start your engine). Don't let fuel get in contact with the pull starter as this
may weaken it. The Pull Starter is designed to start the engine running in a counterclockwise
rotation.
Forcing the flywheel clockwise will cause severe damage to the pull starter.
8. CARBURETOR
The factory settings of the engine are as following and are a good starting point for you, if you
are not satisfied with your carburetor settings. Turn in the needles completely (Caution: Do not
overtighten them!) and loosen them the required number of turns again:
• Low speed (#2): 3,5 turns
• Main (#3): 3,0 turns
Idle screw (#1):
Adjusts the air flow when carburetor is fully
closed. Turn CW for higher idle-speed and
CCW for lower idle-speed. Should be open 0.5-
1.0mm.
Low speed needle (#2):
Adjusts the mid/low-speed flow rate of the fuel.
Turn CW for leaner and CCW for richer setting.
Main speed needle (#3):
Adjusts the main flow rate of the fuel (when the throttle is opened
significantly). Turn CW for leaner and CCW for richer setting.
9. RUN-IN
Proper run-in of the engine is a very important step in ensuring that you get the highest perfor-
mance and lifetime of your engine. Take your time for proper run-in. Do not use run-in benches,
but use your car for run-in. Use the same fuel as you will be using for the life of the engine.
Special run-in fuel is not needed. If your engine doesn't start easily you may try loosen the glow-
plug by ½-turn to decompress the engine and try again. Don't forget to tighten the glow-plug
again once the engine started!
Procedure:
• Start the engine and set the main-needle very rich, i.e. excessive smoke coming from the
muffler.
• Let the engine idle for 2mins first to warm it up.
• Now start driving your car, it will be slow and sluggish, but this is an important step.
• Do not allow the engine to rev-up too high, run the engine at half speed on the straightaway.
• The engine should not be too cold and not too hot during run-in, 70-90°C (160-195°F) is per-
fect.
• Let the engine cool down for 15mins after each tank during the run-in period.
• We recommend doing so for 4 tanks of fuel before you start tuning your engine.
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