Displacement: 12.21cc (.75 cu in)
Bore:         26mm (1.02")
Stoke:        23mm (.91")
Horsepower:   2.2 BHP at 15,600 RPM
Weight:       652g   (23oz) (with Muffler)                 (jl10/00)
Weight:       535g (18.9oz) (without Muffler)
Length:       91mm (3.6") From Backplate to Front of Drive Washer
                    25.5mm    (1") Front to Rear Mounting Hole Centers
Width:        41.35mm (1.63") Neglecting Engine Mounting Flanges
                   60mm (2.36") Including Engine Mounting Flanges
                  51.8mm (2.04") Side to Side Mounting Hole Centers
Height:         102mm    (4")
Muffler Length: 171mm  (6¾")(Overall)
Muffler Diameter: 44mm (1¾")
Muffler mounting hole spacing, on-center: 40mm (1.57")
Crankshaft Thread Size:      5/16-24
Recommended Props: Break In: 12x6 or 13x6
Practical RPM Range:         2,000 - 16,500 RPM
Compression Ratio- Geometric: 10.6 : 1
                                  Effective: 7.78 : 1
High Speed Needle:  1½ turns OUT from closed
Idle Mixture Screw: The information on the manual is wrong. There is
                               no gap between the screw and the spray bar.