This is the SuperTigre G-51 Ringed 2-Stroke Airplane Engine.  SuperTigre's G-51 ringed engine may look small, but contains a lot of power.  The G51 gives your .40-sized model extra gusto for exciting climbs, loops, and snaps.

*** 3-YEAR Warranty ***

Features:

• Specially machined crankcase gives increased output
• Schnuerle ported
• Crankshaft supported by two ball bearings

Includes:
One Assembled G51 Engine
One Muffler and Header Assembly
One Glow Plug

Specifications:
Bore:   23mm (.905")
Stroke: 20mm (.787")
Power Output: 1.48/15,500 RPM
Practical RPM Range: 2500-15,500
Weight w/o muffler: 363g (12.73oz)
Width between centers of mounting holes:        42mm (1.65")
Length between centers of mounting holes:       19mm  (.75")
Width of crankcase excluding mounting flanges:  34mm (1.34")
Length from Backplate to front of drive washer: 80mm (3.15")
Height from bottom of crankcase to top of head: 87mm (3.43")
Crankshaft size: 1/4-28
Suggested Prop size: 10x6, 9-1/2x6