Trouble-Shooting - Compact Radial Engines MZ201 Instruction And Maintenance Manual

Whatever model you choose, the engine will only function if:
- good spark is produced,
- there is a proper air/fuel mix.
Often, the majority of problems arise when one of the above conditions is lacking. Get organised and follow
a strict procedure in order to identify the problem. Fault finding must be a logical process. There follows a
brief trouble-shooting guide.
1. THE ENGINE WON'T
START!
Likely cause:
Ignition failure.
The fuel flow valve is closed or the filter is
blocked.
The fuel tank is empty.
You have not followed the start up procedure
correctly.
The spark plug is flooded as a result of
supplying too much petrol when starting up
the engine.
The spark plug is damp on account of
excessive condensation.
The spark plug electrodes are further apart
than the recommended distance.
The electrodes are worn away.
The spark plug is dirty (oil and carbon
deposits on the insulator).
The high tension lead is badly connected,
loose or damaged.
The engine turns too slowly when starting-up
on account of the electric starter motor:
battery is low or defective.
There is water in the fuel system or at the
bottom of the fuel tank.
Insufficient compression or damaged engine.

TROUBLE-SHOOTING

Turn the switch to ON.
Open the valve, clean or replace the filter and
check the fuel lines for any leakages.
Re-fuel.
Repeat the process, following the instructions
carefully.
Remove and clean the spark plug, crank the engine
to expel any excess fuel, Replace the spark plug
and start the engine.
Dry the spark plug carefully.
Adjust electrodes so that the distance is 0.5 - 0.7
mm, as indicated in the technical specifications.
Replace the spark plug.
Clean the spark plug carefully using a metal brush
or replace, as necessary.
Connect the cable or check it is in good condition,
as appropriate.
Re-charge or replace the starting battery.
Change the fuel and clean the carburettor, the
carburettor piping, filter and fuel tank.
Contact your local dealer.
Remedy:
15