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
 


F-23 2 cycle 50hp

If you prefer an opposed cylinder engine, then this one's for you. The F-23 puts out an amazing 50hp at only 6150 rpm and provides 42ft/lbs. of torque. All with a total weight of only 78 Lbs.. This engine can handle any part 103 ultralight and most single seat experimentals. Opposed pistons cancel out each others internal inertia forces resulting in an amazingly smooth running engine.

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

Alternate Views:
 
Top
Left Side

F-23 W/Electric-Start &
Slide carburetor
$7,629.00
F-23 W/Recoil-Start &
Slide carburetor
$6,837.00
F-23 W/Electric start & Fuel Injection
$9,759.00
 
Belt reduction drive
$1,309.00
Optional oil injection   $395.00

The F23 is an amazingly smooth running opposed cylinder engine.

Model:
F-23
Engine Type:
Opposed - 2 cycle, two cylinder
Bore:
72mm
Stroke:
64mm
Displacement:
521cc
Compression:
9.5:1
HP Output:
50hp @ 6150rpm
Torque:
42ft.lbs @ 6150rpm
Ignition:
Dual CDI
(Capacitive digital Ign.)
Carburation:
Dual 34mm slide or optional fuel injection
Fuel Pump:
Auxiliary external pneumatic
Lubrication:
Fuel mixed with oil @ 50:1 or optional oil injection
Rotation:
Counter clockwise, viewed from output end
Starter:
Alternator:
12 volt electric, optional recoil
250 watt/20 amp alternator standard
Cooling:
Free air Cooled by prop blast
Weight:
78lbs, including reduction unit, full exhaust, and electric start or71lbs with recoil start reduction unit and full exhaust
Reduction Units:
Multi V Belt drive - 1.8:1, 2.0:1 and 2.5:1 ratios available
Direct Drive coupling also Available
Couples directly to crankshaft, weight 2 lbs.


Engine Print



Customer Photo Gallery



F-23 installed in BeLite legal 103
Ultralight



F23 installed in Sadler Vampire

Front View (Picture #2)