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Product Detail |
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Stock Status
(Estimated)
Late Mar
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.
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