GMEG1025     25ABC-FN .25 ABC BB Fr Ndl Vlv w/Mfflr 

TECH NOTES

This is a .25 2-Stroke Airplane ABC Engine w/ Front Needle Valve from GMS.

FEATURES  Low Speed needle-equipped carburetor with front-mounted High Speed
needle valve
Aluminum Brass Chrome piston/sleeve construction
Adjustable exhaust outlet on muffler allows 360° rotation of
muffler tip
Gold anodized heatsink head.
Ball bearing-supported crankshaft
One piece crankcase with a bead-blasted finish
2 year warranty on all GMS engines

INCLUDES: One .25 cid (4.07cc) airplane engine
One bolt-through muffler
One carburetor
One muffler gasket
One glow plug
Two allen key tools
Two muffler screws
One manual and parts list

REQUIRES: Attaching carburetor and muffler.
5-15% airplane nitro fuel.
8x4 propeller for break-in

SPECS:    Displacement: .25 cid (4.07cc)
Bore:          18mm
Stroke:        16mm
Output: .85 BHP at 18,000 RPM
Practical range: 2,400 - 19,000 RPM
Weight:        10.9oz (310g) with muffler

Center distance width across mounting holes: 1.5" (38mm)
Distance between mounting holes same side: 0.59" (15mm)
Length from front of crankcase to backplate screws: 3.0" (77.7mm)
Width across mounting flanges: 1.8" (45mm)
Total height of engine: 2.92" (74.2mm)
Length from center of head to front of crankcase: 2.2" (55mm)
Widest width of crankcase neglecting mounting flanges: 1.8" (45mm)
Length from front of crankcase to center distance of front
mounting hole: 1.87" (47.5mm)
Height from crankshaft center to top of head: 2.3" (59.2mm)
Crankshaft thread size: 1/4-28

COMMENTS: Propeller size range: 7x6-8x6
For the GMS .25 engine with remote mounted needle, use GMEG1125
To convert to a remote needle use GMEG7250 & GMEG7350

All GMS engines use the same owner's manual
If using the Slimline Pitts muffler (SLIG2216) you must use the screws
that come with muffler.

ACCESSORIES

THIS IS THE GMS .25 FRONT NEEDLE VALVE AIRPLANE ENGINE.
FEATURES: 2 NEEDLE CARB FOR SEPARATE HIGH AND LOW SETTINGS, HIGH SPEED NEEDLE
HAS HOLE FOR MUSIC WIRE EXTENSIONS, BALL BEARING SUPPORTED CRANKSHAFT, GLOW
PLUG, ROTATABLE MUFFLER W/PRESSURE TAP & GASKET
REQUIRES, 10-15% FUEL, BREAK-IN PROP, FUEL FILTER, FUEL TUBING, GLOW STARTER