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The engines must not be modified. All the modifications will make the engine unstable in tuning and weaker in operation. Novarossi
World s.r.l. will not be responsible for any modification on its engines.
1. SAFETY RULES
This product is not a toy but a competition engine. It can be dangerous and it can cause damages if these safety rules are not followed
and the instructions specified in this workbook are not followed. In particular:
- This engine cannot be used under 14 years of age;
- The engine must not be started before having fixed it on the model with 4 screws as explained on the model's manufacturer hand book;
- Do not manipulate or modify the engine in order to avoid dangerous situations. Use it only with suitable pipes. Novarossi World S.r.l. will
not guarantee the safety level of operating certified by the mark if any modification/manipulation is made on the engine itself.
- Only high quality radio controls and components must be used in order to assure a perfect and sure control of the model. In particular
the propeller must be of very high quality to minimize risk of breakage and unpredictable damages.
- The engine must be used only for model purposes.
For a complete list of safety rules see point “safety instructions”.
2. INTRODUCTION
These instructions have been prepared to:
- obtain the best performances from the engines guaranteeing them longer life;
- prevent mistaken maintenance before, during and after the use from generating damages to the engine;
- guarantee a high safety use level of the engine.
3. WARRANTY AND RESPONSABILITY
The warranty covers eventual manufacturing defects (material) but does not cover damages due to wrong or non correct use which does
not correspond to the specifications required at the order of the item. See indications given and limitations specified at point 9 of this
workbook.
Any attempt to manipulate or any particular modification will cause the end of the warranty
.
4. IDENTIFICATIONS OF THE ENGINE
In the engine box you will find these following documents:
- Identification sheet of the product, it includes batch number of the engine. This number is fundamental to track back the production
date of the engine and must always be transmitted in case of service's request;
- Exploded design of the engine and its carburettor: It includes an exploded design of all spare parts which are part of the engine and
carburettor and their referring part numbers or eventual optional parts.
- Factory carburettors settings Novarossi World reserves the right to modify products without notice.
5. CONNECTIONS / IGNITION STARTING AND STOP
5.1 CONNECTIONS.
Must be made properly following the instructions given by the model manufacturer:
1. Connect the manifold and the pipe to the tank;
2. Connect the fuel tube to the carburettor;
3. Connect the uniball of the carburettor to the servo control;
4. Connect the crankshaft to the model clutch.
5.2 IGNITION AND STARTING.
1. Connect the glowplug to the 1.2-Max 1,5 Volt igniter;
2. Throttle by radio-control after you have opened the carburettor to a quarter of its total travel;
3. Put the model on the starter box where an electric motor through a rubber wheel transmits the starting movement to the engine and
turn theengine flywheel counter clockwise.
5.3 STOP.
Use a rag to cover the exhaust tip. Be careful! The exhaust is extremely hot so be sure you are using a thick rag. Be aware that the rag is not
covering the air filter, otherwise dirt could be pushed inside the motor.
Attention – Never stop the fly wheel with your hand
.
6. RUNNING-IN
Novarossi World S.r.l. suggests to run in properly the engine in order to settle all its mechanical parts. The carburettor is set at the factory
and it only needs adjustments to control the base and full speed needle to get the best tuning. Fix the engine on the car and run it in at
low rpm for at least 30 minutes.
7. TYPE OF FUEL MUST BE USED.
You must use high quality fuel because good fuel grants good performances and long life to the engine. In our opinion the best lubricant
is castor oil (sale code 1N1) which prevents overheating and assists the lubrication of all moving parts such as bearings, crank pins, pistons
and sleeves. Small quantities of synthetic oils are allowed (sale code 1T2).
Fuel composition for running: 14% de gummed castor oil (first pressure acidity lower than 0.5) or 7% castor oil+7% synthetic oil+ 80% pure
m 6% nitro. Be aware that the compression ratio could vary accordingly to the engine’s operation level, to weather temperature
and pressure. Please follow these steps to optimize your engine in case of temperature fluctuations:
- In a case of a temperature increase, add 0.05 / 0.1 mm head shim.
- In case of a temperature reduction remove 0,05/0,1mm head shim.
Remember to compress your engine removing 0,05/0,1 mm head shims when the altitude increases compared to your normal operating
level. Fuel composition after the running: 25% nitro / 4% castor oil / 6% synthetic oil / 65% pure methanol.
8. BEST RUNNING-IN CONDITIONS FOR THE ENGINE
It is very important to wisely control the acceleration of the engine in order to make the pipe resonating as quietly as possible avoiding
useless skidding to the model; very often engines break during warm up due to sharp accelerations and to the driver’s frenzy. Sharp
acceleration causes the skidding of the balls of the ball bearing into their sliding guides and consequently wear.
WARNING
BEFORE USING THIS ENGINE PLEASE READ CAREFULLY THIS INSTRUCTION HANDBOOK
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Off-Road
CLUTCH
71020/13
14 pinion gear
13 pinion gear
71020/14
71026
27000
71027
71000
71025
71022/P (CFM)
71024
20600
71021/10
71023
71022/K
71021/11 (Ø 1.10 mm)
OPTIONAL
KIT 71021/K
(Ø 0.90 mm)
(Ø 1 mm)
71021/09
(71021/09+71021/10+71021/11)
71022/A (aluminium)
ASSEMBLY INSTRUCTIONS
- Place the cone 20600 on your engine's
crankshaft;
- Put the 4 springs on the shoes 71022/A
and 71022/P) and insert on the lywheel's
(71024) pins;
- Assemble the closing 71023 centering
the final part of the springs with the
four cut outs on the flywheel;
- Turn anti clock wise and push the
closing towards the flywheel;
- Put the complete flywheel on your
engine's crankshaft securing it with
71025.
Screw clockwise the high speed needle
“A”
until it will stop. Once you
reach the stop, unscrew counterclockwise for 3 and ½ turns.
Screw clockwise the low speed needle
“B”
until it will stop while
keeping the carburetor barrel fully open. Then unscrew for 5 turns.
The idle screw
“C”
is used to set the mechanical minimum. Pushing the
barrel completely to the end in the arrow direction, it needs to set the
screw to obtain an opening of about 0,5mm (see the picture). Before to
do this set we suggest to remove the Venturi.
NOTE: the tuning can vary depending on the
type of carburetor, track typology and
driving style.
The screw
“D”
is the medium speed needle, used for a finer
carburetor tuning. To restore it at the factory setting, you
have to clockwise it until the stop and unscrew
of 1 turn and ¼.
Setting starting tuning
CARBURETTOR
D
B
0.5 mm
C
A
VERSIONS
Mephisto.21OFF/H: Rear bearing with ceramic balls
Front bearing with steel balls
Mephisto.21OFF/A: Rear and front steel balls bearing
FUEL TYPE: 25% NITRO
MEPHISTO.21
OFF-ROAD
Off-Road Engine - square stroke - 4 ports
TECH SPECS
Displacement:
R.P.M. Max Power:
Bore x stroke:
Crankshaft:
Glow plug:
Carburettor:
Weight:
3,49 cc
36.500
16,42 x 16,42 mm
14 mm - Turbo - DLC
CTO6
Plastic - 9mm - 3 needles
365 g
RECOMMENDED EXHAUST
TUNED PIPE:
MANIFOLD:
Cod.51007 (EFRA 2135)
Cod.41021
