Tower Catalog Page:	203
E-mail This Page To A Friend

 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

          Factory Settings:
             High speed: 1½ turns OUT
             Low end: 2mm gap
             Idle speed: N/A- adjusted through throttle

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.

                                                                    jxs 7/31/03
                                                                         ir/jxs
                                                               updt lmm 3/27/09



– If you need more information, use these GMS Engines resources –

Click Here: Manufacturer's Product Web Page
Phone: 217-398-8970


 
Postal Address:
GMS Engines
1610 INTERSTATE DRIVE
CHAMPAIGN, IL 61822  








Click here for Units of Measure Conversion Calculators