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Rotax Engines
Hirth Engines
   Hirth 2702-40HP
   Hirth 2703-55HP
   Hirth 3202-55HP
   Hirth 3203-65HP
   Hirth 3503-70HP
   Hirth F30 (80HP-110HP)
   Hirth F33-28HP
   Hirth F23-50HP
   Hirth 3701 84HP - 100HP
Engine Mount Kit

Special design-High Torque/Low Rpm Engine. The 2702 produces 40 hp at only 5500 rpm while building an impressive torque of 39 ft lbs. at only 4500 rpm. Operating in an Rpm range 1000 Rpm less than conventional 2 cycles results in a very smooth and quiet running engine with impressive power. Fuel rate is lowered and TBO increases. The 2702 has an outstanding reliability record. Factory recommended TBO is rated at 1200 Hrs. @ 75% power. 2702 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. 2702 crankshaft is 4130 chromemolly steel. Heads, cylinders, rings, block casting, connecting rods and associated components are all of the highest grade alloys available.
Hirth 2702-40HP

Model:

Model:

2702

Carburation:

Single 34mm slide

Engine Type:

2 cycle, two cylinder

Fuel Pump:

Aux. external pneumatic

Bore:

72mm

Lubrication:

Fuel mixed with oil @ 50:1

Stroke:

64mm

Rotation:

Counter clockwise, viewed from output end

Displacement:

521cc

Starter:
Alternator:

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

Compression:

9.5:1

Cooling:

Optional, fan cooled or free air cooled by prop

HP Output:

40hp @ 5500 rpm

Weight:

70 lbs- Free air, 76 lbs. fan cooled including recoil starter and exhaust. Optional gearbox adds 19 pounds.

Torque:

39ft/bs @ 4500rpm

Reduction Units:

G-50 gearbox available in 2.16:1, 2.29:1, 2.59:1, 3.16:1, and 3.65:1 ratios. Various belt drives also available.

Ignition:

Dual CDI
(Capacitive Digital Ign.)

Drive Coupling:

Elastomeric dampener or optional centrifugal clutch.