Sport aviation engines for Ultralights, Homebuilts, Kitplanes, Gyrocopters, Helicopters, Powered Parachutes, Trykes, Hovercraft & Air Boats.

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3203 2 cycle 65hp

(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 powerplants for the heaviest of ultralight trainers, gyrocopters and light experimentals today. 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.


Dual Carb Recoil Start
$5143.00
Dual Carb Electric Start
$5763.00
Dual Carb Recoil Start Gear Box
$6407.00
Dual Carb Electric Start 
Gearbox
$6960.00
Fuel Injection Option
$1591.00

 

Hirth's most popular engine.

Model:
3203
Engine Type:
2 cycle, two cylinder
Bore:
76mm
Stroke:
69mm
Displacement:
625cc
Compression:
9.5:1
HP Output:
65hp @ 6300rpm
Torque:
55ftlbs @ 6000rpm
Ignition:
Dual CDI (Capacitive digital Ign.)
Carburation:
Dual 34mm slide or optional electronic fuel injection
Fuel Pump:
Auxiliary external pneumatic / electric pump with fuel injection
Lubrication:
Fuel mixed with oil @ 50:1 or optional oil injection
Rotation:
Counter clockwise, viewed from output end
Starter:
Alternator:
12 volt electric, recoil, or both
250 watt/20 amp alternator standard
Cooling:
Optional fan or free air cooled by prop
Weight:
73 lbs-free air, 79 lbs-fan cooled including electric start and exhaust. Optional gearbox adds 19 lbs.
Reduction Units:
G-50 gearbox available in 2.16:l, 2.29:l, 2.59:l, 3.16:l and 3.65:l ratios Cog belt belt drive also available.
Drive Coupling:
Elastomeric dampener or optional centrifugal clutch.


Engine Print



Exhaust Print


Customer Photo Gallery



3203's installed in Paraski twin engine PPC
Picture #1 Picture #2
Picture #3



2706 installed in Xair
Picture #1 Picture #2




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


3203 on Kalb Firestar II SS
Picture #1 Picture #2
Picture #3 Picture #4