9. MAINTENANCE / CLEANING / CONSERVATION OF THE ENGINE
9.1 MAINTENANCE OF THE ENGINE AFTER USE.
Before the engine is stored after use, we recommend the following procedure:
1° - 1st Ensure that no fuel remains inside the engine: disconnect the fuel feed line (using a clip or a tape) and wait until it burns out
completely and empty the tank. This is very important in order to prevent oxidation and rusting inside the engine, if fuel is left inside the
engine for any length of time, it will create an acid solution containing alcohol, water and nitro which will heavily ruin the engine. The
con-rods for instance, will turn a lead color, crankshaft and bearings will be darker in the affected areas.
Attention - Please be careful to all moving parts
.
2° - Outside cleaning of the engine. For this you can use petrol mixed with 5-10% lubrication oil and a small brush to remove dirt.
Attention – You must proceed when the engine is stopped and cold to avoid contact with moving parts or dangerous high
temperatures
.
3° - Inside cleaning of the engine.The same mixture can be used to clean the inside of the engine but before doing this remember to
remove air filter, glow-plug and backplate. Place the piston in the top dead center (TDC) before removing the backplate. If you do not
follow this advice you could break the piston against the backplate’s groove, wash and lubrificate with Novarossi oil 1M2.
9.2 PROTECTION OF THE ENGINE.
Dust – Sand. Dust and sand can cause engine wear. Most of all on piston (which wears), ball bearing, crankshaft (which scratches on the
aspiration area), on the crankpin (which can become smaller of 0.10mm on the Ø). With the pin in these conditions you risk to break the
con-rod. In order to avoid this kind of problem you should carefully and correctly maintain the air filter.
Rust – Oxidation. Rust and oxidation can be avoided using good quality fuel. Alcohol can contain a high percentage of water or it can
absorb it from the atmosphere being it hygroscopic. The engine can rust even If nitro is not first quality as well. If you note oxidation in
your engine, we strongly suggest to stop using your present nitro and run the engine using only a mixture of alcohol and oil. A good fuel is
composed of alcohol without water, good nitro and de-gummed castor oil of first pressure (acidy lower than 0.5%). Parts mostly exposed
to oxidation and rust due to bad fuel are: ball bearing, shaft and con-rod.
Attention – Do not drink fuel or its components and do not
inhale vapors
.
Overheating. Overheating can be avoided not using a too lean mixture (low fuel/air ratio). Overheating the engine can cause an increase of
temperature on the engine and the crankpin could turn blue. This means that it reached 200° Celsius. With the crankpin also the con-rod
overheats over 180° Celsius, losing its mechanic al characteristic. In this case we suggest to replace them. Generally when the piston has
been exposed to overheating it will seize near the exhaust and the sleeve will no longer be usable. Overheating can also lead to failure of
the piston and the combustion chamber.
Overdrive. Many of the causes of overdrive are due to failures of the gear, clutch or radio control. In this case the rear cover should always
be removed to check for any damage on the crankpin, which could get excessive play, if this happened you must replace these parts.
10. SAFETY INSTRUCTIONS
Many indications referring the right and safe use of the engine have been supplied in this workbook. In this chapter we resume and
complete them with other ones pointing out that the user is the only responsible for a safe conduct towards himself, third parties, animals
and locations. Being the engine part of a complex model which can be potentially dangerous, it must be started up after having checked
the model responses to the most important safety requirements. This check must be made by the manufacturer of the model and
assured by the presence of logo on the product.
10.1 - Everybody who can be damaged by the model (above all children) must be kept away from the operator and from the model.
Spectators must always respect safety distances.
10.2 - The engine must be carefully fixed on the model. Be aware that the engine during its operations could generate high temperatures
on itself and on the model where it is installed. The noise is reduced thanks to a silenced pipe. You cannot start the engine without this
pipe.
10.3 - When you start the engine you must keep your face, body and hands away from moving parts (gears, wheels,…). Do not touch the
engine, there could be very high temperatures.
10.4 - All adjustments must be made using instruments (screw drivers) of correct dimensions.
10.5 - You must use a radio control and components of high quality, this allows a perfect control of the engine (acceleration and stop).
10.6 - Keep fuel in a suitable and sure place.
10.7 - Follow with care the safety rules given by different federations, basing on category and use of model.
10.8- Ask always to the shop for any requirements, information and/or to signal any anomalies.
11. CONCLUSIONS – WARRANTY RESTRICTIONS
Novarossi World S.r.l. will always try to use the best materials available to maintain the high quality and reliability of products. We reserve
the right to make changes without notice. No warranty is given for damaged ball bearings, con-rods and couplings installed on the
engine. In fact ball bearing can be ruined by rust and oxidation, caused by the use of bad quality alcohol. Con-rods break for sudden
leanings by bad lubrication for incorrect working of gearbox due to over drive happened also in a previous moment and, above all, for the
use of improper fuel. The same damaging causes to the con-rod may cause an irreparable failure of the sleeve due to the high temperatu-
re reached. Novarossi World does not guarantee the wear of the pin of the shaft caused by dust which comes into the engine.
In any case we cannot replace under guarantee any engines or spare parts which after examination present manipulation of one of the
defaults above listed.
Do not clean the silicone tuned crankshaft with solvent or
gasoline.
Attention – You must procede when the engine is
stopped and cold to avoid contact with moving parts or
dangerous high temperatures
. We recommend to use the
following anti-dust covers (cod. 29065) on your crankcase,
carburettor and fuel intake. A very important procedure to
make the engine properly run is air filter cleaning which
should be done as following: take out the air filter, wash it
with petrol mixed with 10% oil, blow from inside to outside to
eject all the collected dirth cover it with Novarossi oil (code
30021/50), fix again the air filter on the carburettor, ensuring that the retention band is firmlyfixed. A correct maintenance of the air filter
avoids dust sucking in the engine which is very dangerous for the engine itself.
YES
TDC
BDC
www.novarossi.it | store.novarossi.it
Mephisto.21OFF/H | Mephisto.21OFF/A
R
NOVAROSSI WORLD S.r.l.
Via Europa, 20/A - 25040 Monticelli Brusati (BS) - ITALIA
web: www.novarossi.it | e-mail: [email protected]
Tel. +39 030/6850316 | Fax: +39 030/6850314
Drawings are just indicative.
EXPLODED VIEW
H I G H P E R F O R M A N C E N I T R O E N G I N E S
NOVAROSSI WORLD S.r.l. reserves the right to modify products without prior notice.
51007
(EFRA 2135)
41021
Short
manifold
Ø16/13
08067-T17
08567-T17
05000
04002
06011/17
05001
14002
07006/18
19000
20000
17007
27000
09034/17
18000
18000
19000
21000/2
15015/18
12000
13022
14001
01000
CTO6
28136
29002
03011
0.10 mm
03013 0.20 mm
Date of last modification:
06-03-2019
Mephisto.21 OFF/H
16801 (ceramic)
Mephisto.21 OFF/A
16800 (steel)
Exhaust Recommended
MEPHISTO.21 OFF-ROAD
Mephisto.21OFF/H
rear bearing with ceramic balls
front bearing with steel balls
Mephisto.21OFF/A
rear and front steel balls bearing
24400
24073
(Ø7.0mm)
24470-A
0.15 mm
0.25 mm
03012
03014
Optional
Mephisto.21 OFF/H
02167/18
Mephisto.21 OFF/A
02167/18A
The 51007 EFRA 2135 tuned pipe, made in collaboration
with Hipex, coupled with manifold 41021, allows the same
consumption to be maintained further increasing
performance.
CARBURETTOR
CODE: 24073
REVERSE
11007
11019
11009
11015
11012
11028
11044
11034
24167
11042
11046
11047
11043
11020
11021