MOTOR GMS 1.20 ROLETADO GMEG1220

This is the 1.20 Rear Needle Valve Ringed engine without muffler from GMS.

It features a one-piece head with a hemispherical combustion chamber for increased power, large crankshaft for balance and strength, and top quality ball bearings, all backed with a full TWO YEAR warranty.

FEATURES: 

• Hemispherical combustion chamber
• Rear-mounted, remote needle valve reduces chance of injury from spinning propellers
• One-piece cast crankcase with "bead-blasted" finish
• Cylinder head machined from aluminum bar stock and anodized gold
• Carburetor features 2 needles for independent High & Low adjustments "Dykes" piston ring design

INCLUDES: 

• One 1.20 GMS engine
• One carburetor
• One remote needle valve and bracket
• One glow plug w/copper washer
• One 3mm allen wrench
• One 1.5mm allen wrench
• One instruction manual
• One exploded view/parts list

REQUIRES: 

• Muffler, bolt-on style
• Attaching remote needle and bracket
• Fuel with 18% (minimum) lubricant content and 10%-15% Nitromethane

SPECS:

• Displacement: 19.9cc (1.20 cid)
• RPM range: 1800-14,000 RPM
• Bore: 30mm (1.18")
• Stroke: 28.2mm  (1.11")
• Weight: w/o muffler, carb, drive washer, prop washer glow plug or nut 750g    (26.5oz) w/muffler 79g (31oz)
• Horsepower: 3.3BHP @ 13,000 RPM
• Length: Backplate screw to front of drive washer: 110.5mm (3.74")
• Between centers of the mounting holes: 30mm (1.18")
• Width: Width neglecting engine mounting flanges 50mm (1.97")
• Distance between centers of the mounting holes: 60mm (2.36")
• Exhaust mounting screws width (center to center): 40mm (1.58")
• Height: 120mm (4.72")
• Crankshaft Thread Size: 3/8-24
• Crankshaft Length from front of drive washer to front of crankshaft: 35.6mm (1.40")
• Crankshaft Threaded Area: 22mm (0.87")
• Suggested Prop:
• Sport: 16x10
• Racing: 16x8
• Scale: 18x5, 18x6