Husqvarna FS 410 D Operator's Manual page 28

Governor Speed
It is critical that Governor and throttle on all internal
combustion engines be adjusted properly. Engine speed
is preset at factory for proper sawing speed. It is NOT
normally necessary to change this setting. It should be
periodically verified after machine is placed into service.
To change the Governor setting, refer to the engine
manual.
Overspeeding Diamond Blade (H) can result in
blade breakage and/or personal injury to operator
and bystanders! To assure proper Governor
adjustment, determine correct blade shaft speed
(RPM) from the adjacent chart. Follow engine
manufacturer's instruction procedure for Governor
and throttle setting.
8
MAINTENANCE & LUBRICATION
WARNING!
Blade Shaft & Engine Speed
Blade Shaft
Model
RPM
FS 0 D 00
Engine
RPM
00