Hirth 3203, Hirth 2706, Hirth 3203 65 HP ultralight aircraft engine.

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CGS Hawk powered by Hirth 3203 2 cycle 65hp
ultralight aircraft engine.

Hirth aircraft engine on CGS Hawk.

( Replaced Hirth 2706 - May 2002 )

Hirth's most popular engine! The 3203 produces more horsepower and torque per pound than any other engine in its class. The Hirth 3203 is the forerunner in power plants for the heaviest of ultralight trainers, gyrocopters and light experimental aircraft. 

Factory recommended TBO is rated at 1000 Hrs. @ 75% power. 

3203 incorporates Al-Nikasil coated cylinders for superior performance and reliability. Al-Nikasil in simple terms is a nickel based material, applied in a paste form, when super heated it becomes part of the cylinder itself.

Al-Nikasil provides for a super low coefficient of friction, reducing engine heat and wear. The pistons and cylinders expand at the same rate thus providing for a seizure resistant engine. 3203 crankshaft is 4130 chromemolly steel.

Heads, cylinders, rings, block casting, connecting rods and associated components are all of the highest grade alloys available.

Model:

 3203

Carburation:

 Dual 34mm slide or optional electronic fuel injection

Engine Type:

 2 cycle, two cylinder

Fuel Pump:

 Auxiliary external pneumatic / electric pump with fuel injection

Bore:

 76mm

Lubrication:

 Fuel mixed with oil @ 50:1 or optional oil injection

Stroke:

 69mm

Rotation:

 Counter clockwise, viewed from output end

Displacement:

 625cc

Starter:
Alternator:

 12 volt electric, recoil, or both
250 watt/20 amp alternator standard

Compression:

 9.5:1

Cooling:

 Optional fan or free air cooled by prop

HP Output:

 65hp @ 6300rpm

Weight:

 73 lbs-free air, 79 lbs-fan cooled including electric start and exhaust. Optional gearbox adds 19 lbs.

Torque:

 55ftlbs @ 6000rpm

Reduction Units:

 G-50 gearbox available in 2.16:l, 2.29:l, 2.59:l, 3.16:l and 3.65:l ratios

Ignition:

 Dual CDI
(Capacitive digital Ign.)

Drive Coupling:

 Elastomeric dampener or optional centrifugal clutch.
 
Recreational Power Engineering 5479 E. Co. Rd. 38, Tiffin, Ohio 44883
 419-585-7002

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