Speed Governor - Husqvarna 2100 Workshop Manual

Speed governor

The purpose of the governor is to limit the engine
speed in order to protect vital parts like the crank-
shaft and ignition system from excessive stresses.
We therefore advise most strongly against any inter-
ference designed to render it inoperative. When the
saw IS run under no-load conditions, the engine
speed IS limited to 10,500 r/min as the governor
comes into operation.
Fig 4:6
1. Steel ball. 2. Spring 3 Fuel inlet. 4. Fuel outlet
The steel ball and spring in the governor are so de-
vised that vibrations in the carburettor at a certain
engine speed cause the steel he I l to open the fuel
outlet. An excessively rich mixture IS then obtained
and the engine begins to four-stroke, the speed
drops and the vibrations decrease. The steel ball
then closes the outlet, the engine speed increase
and the process IS repeated.
Removal of speed governor
Remove the screw for the choke flap. Pull out the
flap approx. 7 mm and push out the choke shaft
approx 5 mm. Remove the speed governor with a
suitable screw driver.
4:2
Carburettor check
A. Pumping section
Clean the fuel screen and -lines with compressed
air.
Check the gasket and the pump diaphragm for
damage or wear.
B. Metering section
Check that the adjuting needles are straight and
that their tapered ends are not damaged. Check the
Fig 4:8
gasket and the metering diaphragm for damage or
wear. Check with particular care the wear on the
centre pin of the diaphragm.
Fig 4:9
Check that the needle valve is not worn, neither on
its seat, nor in the groove for the lever