View Larger Picture

E-mail This Page To A Friend

      This is the Ofna Hyper Mach .28 Nitro Car Engine with Pull Start
                              and Rear Exhaust.

FEATURES: Six port ABC cylinder construction-"A"luminum piston,"B"rass cylinder
            liner that is "C"hrome plated
          Slide Valve Carburetor
          SG (pilot) crankshaft
          For increased torque and top-end power engine can be converted to
            starter box operation by purchasing the Rear Back Plate Cover,
            OFNG5089
          Same mounting dimensions as a .21 cu in engine

INCLUDES: Ofna Hyper Mach .28 Nitro Car Engine with Pull Start,
            exhaust gasket and instruction sheet

REQUIRES: Fuel: 10-25% nitromethane content
          Glow plug
SPECS:    Claimed Horsepower: 2.8 HP
          Displacement: .28 cu in (4.6cc)
          RPM: 38,000
          Crankshaft: 14mm SG
          Carburetor: 8mm Slide Valve
          Break-in Settings:
            Needle Valve (High Speed mixture)- 6¼ turns counterclockwise
              from closed
            Midrange Needle- pre-set ½ turn counterclockwise (do not adjust)
            Throttle Stop Screw- About 1mm open from "just closed" position,
              adjust opening so engine idles smoothly at low RPM without
              engaging the clutch

          Distance between mounting holes same side:                .87" (22mm)
          Distance between mounting holes opposite side:           1.4"  (37mm)
          Height from bottom of crankcase to top of cylinder head: 4.25"(108mm)
          Length from pull starter to front bearing:                3.3" (85mm)
          Length from pull starter to end of crankshaft:           4.6" (117mm)
          Length from back of crankcase to front bearing:          2.5"  (64mm)
          Length from back of crankcase to end of crankshaft:      3.7"  (93mm)
          Length from center of crankcase to end of crankshaft:    2.9"  (73mm)
          Width of mounting tabs:                                  1.7"  (44mm)

                                                                    jxs 3/29/06
                                                                         ir/jxs



– If you need more information, use these Ofna resources –

E-mail: help@ofna.com
Web Site: http://www.ofna.com/
Phone: 949-586-2910


 
Postal Address:
Ofna
7 VANDERBILT
IRVINE, CA 92618  








Click here for Units of Measure Conversion Calculators