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

Home
Hirth Company History
Hirth Engines
Powerfin Props
 • Blade Features
 • Pricing and    Ordering
BlueMax Two Stroke Oil
Accessories
Authorized Hirth Dealers
New Stuff
Testimonials
Contact
 


3502 water cooled 2 cycle 60hp

Special Design - High Torque/Low Rpm - fuel efficient Engine

The 3502 produces 60hp at only 5000 rpm while building an impressive torque of 62 ft lbs. at 4750 rpm. Operating in an Rpm range 1500 Rpm less than conventional 2 cycles and 1200 Rpm less than competing 4 cycles results in a very smooth, quiet running engine with impressive power. Fuel rate is lowered and TBO increases.

3502 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 combination of Nikasil cylinders with water cooling render these engines immune from cold seizure, shock cooling or seizure from high EGT conditions. The pistons and cylinders expand at the same rate thus providing for a seizure resistant environment. 3502 crankshaft is 4130 chromemolly steel. Heads, cylinders, rings, block casting, connecting rods and associated components are all of the highest grade alloys available. With optional vertically mounted fuel injection 3502/03 can be used in compact engine compartments. Mounting bolt pattern is identical to the R-582.

 Factory recommended TBO is rated at 1200 Hrs. @ 75% power

Alternate Views:
 

3502 W/recoil start
$5,480
3502 W/electric start
$6,181
3502 W/recoil start & gearbox
$6,721
3502 W/electric start & gearbox
$7,426
Oil Injection Option
$259.00
Electronic Fuel Injection Option
$1,591.00
 

Special Design - High Torque/Low Rpm - fuel efficient Engine

Model:
3502
Engine Type:
2 cycle, two cylinder
Bore:
76mm
Stroke:
69mm
Displacement:
625cc
Compression:
9.5:1
HP Output:
60hp @ 5000rpm
Torque:
62ft/bs @ 4750rpm
Ignition:
Dual CDI
(Capacitive digital Ign.)
Carburation:
Dual 34mm slide or optional electronic fuel injection
Fuel Pump:
Auxiliary external pneumatic - 12VDC with fuel injection
Lubrication:
Fuel mixed with oil @ 50:1 /Blue Max @100:1 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:
Water cooled.
Weight:
79 lbs-not including radiator & coolant. 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.
Drive Coupling:
Elastomeric dampener or optional centrifugal clutch.




Engine Print Side View


Engine Print End View

 

Exhaust System Print