Displacement: 3.68 cu. in. (60 cc)
Engine Power: 4.01 bhp (3.0 kW)
Fuel Capacity: 1.16 pts (.55 I)
Engine Speed: 9,500 rpm (gov)
Arbor Size: 20 mm

Looks like you will have to cut it out of the case. Worth it for such a big engine, IMHO. Go slow and think ahead. I use my saws all for the rough hacking.