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Operating instructions
MVVS 50 IRS No: 3005L/3005S
Version 1.3
Before using the engine, please read these instructions carefully.
Congratulations on choosing the MVVS 50 gas engine.
The MVVS 50 has been designed and manufactured for propeller-powered radio-controlled
model planes. It is able to meet all of your expectations of an acrobatic racing engine.
Technical specifications
Bore
40 mm
Stroke
38 mm
Weight of complete
1560 g
engine without ignition*
Weight of ignition unit
190 g
* Some manufacturers state the weight of incomplete engines. The value in the table above
stands for the weight of a completely assembled engine, including the spark plug, carburetor,
drive washer and prop screws.
Safety precautions
1)
Never use the engine for any manned vehicles.
2)
When operating model planes, always follow the rules and laws in effect in your country.
3)
The manufacturer declines all responsibility for all damages arising from the operation of
models and other appliances powered by the MVVS 50 engine.
4)
Always use original spare parts.
5)
Never tamper with the engine construction.
6)
Before each flight always check that all the propeller screws are tightened up and in good
condition. If you use a spinner, check that it is tightened up, too. When mounting the
spinner always follow the assembly instructions.
7)
Periodically check that the engine is firmly fixed to the engine mounts. Never start a loose
engine!
8)
Always use a balanced propeller! Always replace the propeller when damaged!
9)
Make sure that no part of your body intersects the plane of the spinning propeller.
10) Always wear close-fitting, well-fastened clothes when starting or operating the running
engine. Never wear loosely hanging clothes (ties, scarf, etc.).
11) Never try to stop the engine by using any part of your body.
12) Always stop the engine either by turning off the ignition switch or by completely closing
the carburetor throttle valve.
13) Before starting the engine always make sure that the model is safely fixed in place and
cannot start moving.
RpM range
1000 – 7500 RpM
Unleaded 95-
Fuel
octane fuel
Oil with petrol in
Lubrication
mixture 1:40
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Summary of Contents for MVVS 50 IRS - V1.3
- Page 1 Operating instructions Congratulations on choosing the MVVS 50 gas engine. The MVVS 50 has been designed and manufactured for propeller-powered radio-controlled model planes. It is able to meet all of your expectations of an acrobatic racing engine. MVVS 50 IRS No: 3005L/3005S...
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Page 2: Selecting A Suitable Propeller
17) Be careful in choosing the location where you wish to start the engine. Avoid dusty or Running the engine in, use the MVVS Racing 2T oil, that comes with the engine. Mix it in the sandy areas. -
Page 3: Carburetor Adjustment
Caution! Never over-tighten adjusting needles by force, because it can cause damage to the Carburetor Adjustment needles and carburetor. Carburetors worn like this can not be adjusted and will need to be changed for a new one. Basic setting: (The values are derived from the position of clock-hands) adjusting needle (L) for low revolutions range 2 turns and 0 min After the engine has been run in, adjust it following the instructions below: adjusting needle (H) for high revolutions range 1 turn and 30 min... - Page 4 Caution!!! The engine must be stopped while you adjust the carburetor in order to prevent Starting and running in a new engine injury by the propeller. Before you first start the engine, screw the plug in and tighten it up. Follow the instructions on Caution!!! Never close the choke valve completely when the engine is operating! the box of the spark plug.
- Page 5 Problem guide The engine would not start: check and possibly replace the spark plug (check the spark by inserting the plug into the plug socket and turning the engine. The correct electrode spacing is 0,6 mm.) check the fuel feed turn the engine to check its mechanical condition check whether the carburetor needles are adjusted correctly take the carburetor off and visually examine the condition of the carbon-fiber reed...
- Page 6 Spare Parts List Warranty The MVVS gas engines come with a three-year guarantee against defects in workmanship and Description Description materials. Only original buyers of the engines are eligible warranty claimants. The warranty cannot be transferred with a change in ownership.
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