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2706 2 cycle 65hp


Dual Carb
Recoil Start


Dual Carb
Electric Start


Dual Carb
Recoil Start
Gear Box


Dual Carb
Electric Start
Gear Box


Fuel Injection Option


Hirth's most popular engine! The 2706 produces more horsepower and torque per pound than any other engine in its class. The Hirth 2706 is the forerunner in powerplants for the heaviest of ultralight trainers, gyrocopters and light experimentals today. Factory recommended TBO is rated at 1000 Hrs. @ 75% power. 

2706 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. 2706 crankshaft is 4130 chromemolly steel. Heads, cylinders, rings, block casting, connecting rods and associated components are all of the highest grade alloys available.




Dual 38mm slide or optional electronic fuel injection

Engine Type:

2 cycle, two cylinder

Fuel Pump:

Auxiliary external pneumatic / electric pump with fuel injection




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




Counter clockwise, viewed from output end




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




Optional fan or free air cooled by prop

HP Output:

65hp @ 6200rpm


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


56ftlbs @ 5700rpm

Reduction Units:

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


Dual CDI
(Capacitive digital Ign.)

Drive Coupling:

Elastomeric dampener or optional centrifugal clutch.

Click here to view engine print.

Picture of 2706 installed in Mini 500 helicopter

Picture of two 2706's installed in VSTOL twin engine spray plane

Picture of 2706 installed in Kolb Mark III

Picture of 2706 installed in Rans S12

Picture of 2706 installed in Sky Twister helicopter

Picture of 2706 installed in Fisher Classic Biplane

Picture of 2706 installed in Sno Bird Gyro

Picture of 2706 installed in US Light Aircraft Hornet

Picture of 2706 installed in ASAP Beaver 550

Picture of 2706 installed in CGS Hawk

Picture of 2706 installed in 2 place Tryke

Picture of 2706 installed in Xair pic#1. pic#2.

Picture of 2706 installed in custom dual prop KOLB MKIII pic#1. pic#2.