I really hate to let this go but it will not fit in my Spitfire due to the side carb. It's a strong, smooth running engine with a great low tone sound. It starts 1-3 flips after priming. I flew it in a MXSR for 2 seasons. I bought it from a Club member and I'm sure, but not 100% it has Bowman rings. He put Bowman in all his engines. The ignition works great, it's never been a problem. Last started this past November with one flip. Comes with the muffler, ignition, Zoar 22x8 (used) and drill guide. $7 USPS shipping, lower 48. I'll pay the rest.

Displacement : 53cc
Bore : 44mm
Stroke : 35mm
RPM Range : 1200-7800 RPM
Horsepower : 5.5 HP
Weight : 1880g all up
Fuel/Ratio : Premium Gas mixed 40:1~50:1
Piston Rod : 2 Needle Bearings
Crankshaft : 3 Ball Bearing(NSK)
Ignition : Auto advance ,voltage 4.8~6 Volt
Prop Size : 2 blade 22x8, 22 x 10 ,23x8 ,24x8
Carburetor : Walbro