The Poulans came from Lawnstation.com, someone sent them to me to convert...
Engines run the same either way, the conversion adds no power, just easier starting and less weight...The 46 has the mag coil on the cylinder, the 60 mag coil is mounted on part of the case that gets cut off, so it needs a conversion....The 60 has a flat case so a plate can be easily bolted to it for a mount, the 46 needs 2 rails to mount it on...I haven't run the 60, the 46 turns a Master Airscrew 20-10 about 7000 rpm, a 22-8 about 6400....