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Product Detail |
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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 (GMEG4880)
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 879g (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
COMMENTS: A .078" wire (not included) can be used to extend the needle valve by
inserting the wire into the pre-drilled hole on the end of needle
valve and tightening it in place with the supplied set screw.
All GMS engines use the same owner's manual
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