Product Overview
OS Engines MAX 65AX Nitro Aircraft Engine, .65 Size w/ E-4010A Silencer, OSM16521
Designed as a replacement for the long established Max 61FX, the new Max 65AX has all the features of the new AX series, such as the same mounting bolt pattern and silencer bolt dimensions, making a direct replacement for most 61 class engines. The real bonus is more power and torque for the same basic external dimensions.
Like all the AX series, cooling has been improved by the use of deep finning on the crankcase and cylinder head combined with the new fin pack shape.
The silencer is effective and a great benefit to flying fields with sensitive noise issues. Effective silencing is very much part of the AX design philosophy.
Carburation is the usual OS 'exemplary' standard and very much why OS engines are regarded as the best! That comes from careful design and testing allied to stringent manufacturing standards.
Features:
Ideal for trainers, sports planes and scale aircraft
Mounts in the same space as the 61FX ABL for easy drop-ins
The 65AX is 1.9 ounces lighter than the 61FX
Newly designed 61D carburetor features an angled needle for safety
Includes an E-4010A muffler, #8 glow plug & needle extension cable set
Compatible with the ultra-quiet, ultra-compact E-4050 muffler
Specs:
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 centre of engine to drive hub: 2-5/8" (65mm)
Distance between exhaust bolt mounting holes: 1.6" (42mm)
Distance from centre of engine to end of crankshaft: 4" (102mm)
Distance/crankshaft centre to muffler exhaust outlet: 1-1/2" (38mm)
Height from crankcase bottom to top of cylinder head: 3-7/8" (98mm)
Height/crankshaft centre 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)
