O.S. Engines .65AX ABL w/E4010A Muffler OSM16521

O.S. Engines

Item # OSM16521
$339.99 $199.99
(You save $140.00)
Status: In Stock
Engine Size:
.52 TO .75 - AIR
O.S. Engines .65AX ABL w/E4010A Muffler OSM16521

More information about O.S. Engines .65AX ABL w/E4010A Muffler OSM16521

This is the O.S. Engines 65AX ABL Aircraft Engine with the E4010A Muffler.


  • Ideal for trainers, sport planes, and scale aircraft
  • Drops in easily in the same mounting space as the O.S. 61FX ABL
  • ABL - Advanced Bi-Metallic Liner process uses a double layer of plating material rather than one thick layer
  • ABL helps the metal bond to the cylinder and make the plating more durable
  • Newly designed 61D carburetor with a rearward angled needle valve for safer adjustments
  • Two-year limited warranty through Hobby Services beginning at date of purchase

1x O.S. Engines 65AX ABL
1x 61D Carburetor
1x E4010A Muffler
1x #8 Glow Plug
1x Needle Extension Cable
1x Instruction Manual w/ Decals

Aircraft blend fuel containing 5%-20% Nitromethane w/ atleast 18% lubricant content
Propeller: 12x6, 13x6-7, or 14x6
Field equipment

Displacement: 0.65cu in (10.6cc)
Bore: 0.95" (24mm)
Stroke: 0.93" (23.5mm)
Weight Without Muffler: 17.5oz (497g)
RPM Range: 2,500-16,000
Output: 1.75 PS, 1.73 HP @ 16,000 RPM
Crankshaft thread size: 5/16-24
Distance from center of engine to drive hub: 2-5/8" (65mm)
Distance between exhaust bolt mounting holes: 1.6" (42mm)
Distance from center of engine to end of crankshaft: 4" (102mm)
Distance/crankshaft center to muffler exhaust outlet: 1-1/2" (38mm)
Height from crankcase bottom to top of cylinder head: 3-7/8" (98mm)
Height/crankshaft center to top of cylinder head: 3-1/16" (77mm)
Width including mounting tabs: 2-3/8" (60mm)
Width not including mounting tabs: 1-9/16" (39mm)
Width between mounting holes same side: 15/16" (25mm)
Width between mounting holes opposite side: 2.04" (52mm)