Wiesenfield WIE-PM-1200A Manual De Instrucciones página 126

A worn cylinder, piston or piston ring causes the air
to flow between the cylinder and the crankcase
Improper engine speed control causes overspeed
The main bearing of the crankshaft is burnt
NOTE: gasoline should work at a certain temperature. The generally acceptable temperature at the outlet of the flow sensor is 80-110°C, while the
temperature of the crankcase is around 60°C under the magneto. If the temperatures are above the limits, the gasoline engine becomes excessively hot.
PROBLEM CAUSE
EN
SOLUTION
Replace
Adjust the engine speed to the correct value
with the speed controller
Replace the main bearing