ROTOmotor ROTO 35 FS User manual

TOP FOUR STROKE ENGINES
ROTO 35 FS
OPERATING INSTRUCTIONS
OPERATING INSTRUCTIONS

ROTOmotor Ltd., Czech Republic - Europe Operating instructions ROTO 35 FS ROTOmotor Ltd., Czech Republic - Europe
ROTOmotor manufacturer of top four-stroke engines Page:2
CONTENTS
VERSION 2.6/ENG
Please check the updates of the operating instructions on the website www.rotomotor.cz so that your engine always has the best care.
1. Introduction ................................................. 3
2. Safety instructions .......................................... 3
3. Package contents .......................................... 4
4. Mounting ..................................................... 5
4.1. Mounting of the carburetor ........................... 5
4.2 Waste output ........................................... 5
4.3 Exhaust pipes .......................................... 6
4.4 The engine mount ...................................... 6
4.5 Propeller installation .................................... 7
5. Ignition ...................................................... 10
5.1 Ignition installation .................................... 10
5.2 Ignition power supply .................................. 10
6. Engine lubrication ...........................................11
7. Settings ..................................................... 12
7.1 The valves adjustment ................................. 12
7.2 Carburetor settings .................................... 14
8. Starting the engine ......................................... 15
9. Spare parts .................................................. 16
10. Accessories ................................................. 17
11. Warranty card ............................................... 18
12. Contact / technical support

Introduction
You have purchased a new four-stroke single cylinder petrol engine that requires the rst
few important steps to successfully start your RC plane model .
The engine has already been tested and started by the manufacturer, everything is ne and
it works as it should!
The engine is basically adjusted and tested with a 20/10 propeller tting and ROTO FS
exhausts.
• Always be very careful when handling the engine.
• The engine can start even when the propeller rotates very slowly and injure you!
• Whenever you start the engine, make sure that you have the model secured so that
there is no movement of the model and possible injury!
• Do not drive the plane with the engine running in between spectators and colleagues
at the airport!
• Do not touch the engine after the ight, it is hot and there is a risk of burns!
• You have one body, take care of it and enjoy ROTO engines.
1.
Safety instructions2.
Thank yOu FOR chOOSing OuR pROducT
FOuR-STROke engine
pROduced in The czech Republic.
ROTOmotor Ltd., Czech Republic - Europe Operating instructions ROTO 35 FS ROTOmotor Ltd., Czech Republic - Europe
ROTOmotor manufacturer of top four-stroke engines Page:3
ADVICE WARNING

ROTOmotor Ltd., Czech Republic - Europe Operating instructions ROTO 35 FS ROTOmotor Ltd., Czech Republic - Europe
ROTOmotor manufacturer of top four-stroke engines Page:4
Please follow the instructions carefully.
Check that all the listed parts are in the box.
Standard package contents:
1. ROTO 35 FS................................. 1 x
2. Ignition ROTO 35 FS........................ 1 x
3. Waste oil hose ............................. 1 x
4. Spark plug key CM6 ........................ 1 x
5. Engine mounting .......................... 1 x
6. Cable ties ..................................2 x
7. Silicone tube ............................... 1 x
Package contents3.

ROTOmotor Ltd., Czech Republic - Europe Operating instructions ROTO 35 FS ROTOmotor Ltd., Czech Republic - Europe
ROTOmotor manufacturer of top four-stroke engines Page:5
Mounting
4.1 Mounting of the carburetor
4.
After unpacking the engine must be completed according to the following instructions:
We screw the complete intake, including the carbu-
rettor, onto the engine using two M4 screws.
Do not forget the enclosed gasket which you insert
between the intake ange and the cylinder head.
Air intake is mounted on the carburettor, to which
we must ensure a sucient air supply for the
correct operation of the engine, do not cover it!
It is necessary to connect a hose with fuel supply to the carburettor. A protective plug is atta-
ched to the carburettor fuel tting due to dirt during transport. This plug must be removed
and the gas supply from the model‘s tank connected in its place.
When removing the engine from the model for a longer pe-
riod of time, it is necessary to replace the protective plug
to prevent the fuel in the carburetor from drying out.
Do not remove the air intake, do not modify it!
It‘s part of the engine, and the correct operation
of the engine depends on it.
The image is for illustration purposes only

ROTOmotor Ltd., Czech Republic - Europe Operating instructions ROTO 35 FS ROTOmotor Ltd., Czech Republic - Europe
ROTOmotor manufacturer of top four-stroke engines Page:6
After completing the installation of the carburetor, we can proceed to connect the waste output.
4.2 Waste output
It is necessary to drain a very small amount of unburned oil from the engine, which is used
to lubricate the crankcase. The nozzle, which is located on the engine block, is used for this
purpose. A cap is attached to this nozzle, which must be removed and replaced with a waste
oil hose, which will drain the oil out of the model.
We recommend leading the waste oil hose to the landing gear.
Waste output is very important and must never be blocked.
In any case do not reduce the diameter of the hose, or it will damage the engine.
If the waste output was clogged, the motor will be damaged.

ROTOmotor Ltd., Czech Republic - Europe Operating instructions ROTO 35 FS ROTOmotor Ltd., Czech Republic - Europe
ROTOmotor manufacturer of top four-stroke engines Page:7
4.3 Exhaust pipes
The third part that needs to be mounted is the exhaust pipe
The exhaust pipes are made so that they can be rotated around the axis. Therefore, set the
exhaust pipes to the desired position by turning and then secure by tightening the nut.
Beware of damage to the end of the pipe!
The end of the pipe serves as a sealing surface
for the extension tube. If damaged, it will not be
possible to seal the pipes correctly!
The diameter of the exhaust
pipe cannot be reduced!
ROTO extension pipe and exhaust not included!
There should be no more than 2mm
between the end of the exhaust pipe
and the exhaust.

ROTOmotor Ltd., Czech Republic - Europe Operating instructions ROTO 35 FS ROTOmotor Ltd., Czech Republic - Europe
ROTOmotor manufacturer of top four-stroke engines Page:8
4.4 The engine mount
4.5 Propeller installation
It is very important to mount the propeller correctly. 4 strength screws are used for this
purpose. Tighten them evenly! The propeller must be regularly checked and tightened,
especially when using a new wooden propeller.
For mounting the engine inside the model airplane,we recommend using
5mm high strength steel bolts, large at washers and lock nuts.
1:4
Mounting the engine bulkhead check
occasionally to prevent loosening.

ROTOmotor Ltd., Czech Republic - Europe Operating instructions ROTO 35 FS ROTOmotor Ltd., Czech Republic - Europe
ROTOmotor manufacturer of top four-stroke engines Page:9
Direction of rotation of the propeller / Engine
Check the tightening of the propeller often, especially at beginning, when the
propeller is new!
Loose screws will cause the screws cuts to, exposing you to the risk of injury
as well as damage to your model. This danger is mainly posed by the use of a
wooden propeller.

ROTOmotor Ltd., Czech Republic - Europe Operating instructions ROTO 35 FS ROTOmotor Ltd., Czech Republic - Europe
ROTOmotor manufacturer of top four-stroke engines Page:10
Ignition5.
5.1 Ignition installation
Never remove the Hall sensors from the backplate.
5.2 Ignition power supply
The recommended power supply for ignition is 4-9V.
Always charge the batteries before ying.
Do not rely on charging from the last ight!
Ignition installation is an integral part of installing an engine in an aircraft.
Place the ignition in a suitable place where there is no risk of excessive heat from the
cylinder heads or the exhaust system.
If the ignition is heated above 60 °C, the ignition will switched off and the engine stops
working.
Make sure that the ignition is
well and suciently cooled!
Make sure that the connectors are
tted correctly and that there is no
risk of loosening them!
Do not bend the HV cables into sharp
bends, they may be interrupted!
Install the spark plug cup from the ignition to the spark plugs.