MVVS 50 IRS - Manual (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 valve
- unscrew the carburetor cover on the side of the pressure inlet, check the fuel
screen possibly give the carburetor a blow with a current of air; when
reassembling, make sure you arrange the membrane and gasket in a correct
order
- recheck the pressure hose attached to the carburetor
Replacing the reed valve:
- unscrew and remove the carburetor (mind the gasket)
- unscrew four M4 screws on the flange, remove the flange and take off the reed
valve (mind the gasket)
- unscrew four M2 screws and remove the old valves, replace them with new
ones, screw the screws back in and tighten them gently
- when reassembling, make sure you fix the gasket correctly
Mechanical faults of the engine must always be commit to a professional service
department!
Service information
After each 20 hours of running or 1 year change the spark plug.
After each 50 hours of operation time preventively check the con-rod and the reed valve.
After 300 hours of operation time send the engine to the professional service department
for a check-up.
After each 3 running hours or every 15
th flight do lubricate the front bearing. The new
engine lubricate EARLIEST after first 10 running hours!
Lubrication the engine´s front bearing:
Inject 1.5ml of oil for engines to the hole as in
the picture. During the lubrication DO NOT turn
with the propeller!
NOTE! After the bearing lubrication the engine
can produce more smoke!
Do not forget to apply the screw-cap into the
hole. Running engine without can cause
engine´s damage!!!