USER INSTRUCTIONS
3
12/2014
03/2018
3
Flywheel (magneto housing):
On very old engines, the flywheel may need to be replaced in order for the DIS and CDI to be correctly timed. On these older
engines, the flywheel magneto mounting stud hole location differs from the newer flywheel.
To differentiate between old and new flywheel, locate the center hub. Older flywheels do not have a recess/step on the
center hub; new flywheels have a recess/step.
Engines that have a serial number below 2776900 will require a newer flywheel (600534); failure to replace the flywheel will
lead to incorrect timing and kickbacks during starting.
Difference between old and more recent flywheels:
different magneto mounting stud location
.
Old
flywheel from engine with serial # below 2776900
Newer
flywheel (item no 600534)
Old
flywheel: no recess on center hub
Newer
flywheel: recess/step on center hub
117.5°
125°
117.5°
117.5°
117.5°
125°
1
2
3
1
2
3
Recess
