GMEG1220     1.20RING-RN 1.20 BB Ringed Rmt Ndl Valve 

TECH NOTES

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

ACCESSORIES

THIS IS THE 1.20 REAR NEEDLE VALVE RINGED ENGINE WITHOUT MUFFLER FROM GMS.
FEATURES: ONE PIECE HEAD W/HEMISPHERICAL COMBUSTION CHAMBER LARGE CRANKSHAFT
FOR BALANCE AND STRENGTH, AND TOP QUALITY BALL BEARINGS
REQUIRES: MUFFLER, BOLT-ON STYLE (GMEG4880)
FUEL WITH 18% (MINIMUM) LUBRICANT CONTENT AND 10%-15% NITROMETHANE