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

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F-33 2 cycle 28hp

One little powerhouse of an engine. At only 35 lbs. this is one of the lightest singles you'll find anywhere. With 25ft. lbs. of torque, this engine packs enough punch to spin up the large props on your backpack parachute, tryke or legal 103 ultralight. Factory recommended TBO is rated at 1000 Hrs. @ 75% power. Standard equipment includes fuel pump, spark plugs, air filter, recoil starter, complete exhaust system and dual CDI ignition for added reliability. When ordered with optional electric start the starter solenoid and voltage rectifier/regulator are included. Standard mounting is plate type from bottom of engine. An optional crankcase allows 4 point mounting (firewall forward style) from the ignition side of the case instead of from the bottom of case. This option must be special ordered and adds 2 pounds to total weight. Engine pictured above is equipped with the forward style mount, electric start, and belt drive mounted in the hanging position.


F-33 with Recoil Start
 
$2857.00
F-33 with Recoil Start & 4V Belt Drive
 
$3427.00

F-33 with recoil & Electric start & 4V Belt Drive
 

$3778.00


The F33's are some of the lightest single cylinder engines you'll find anywhere

Model:
F-33
Engine Type:
2 cycle, single cylinder
Bore:
76mm
Stroke:
69mm
Displacement:
313cc
Compression:
9.5:1
HP:
28hp @ 6500rpm
Torque:
25ft.lbs @ 6000rpm
Ignition:
Dual CDI
Carburation:
Single 34mm slide or optional diaphragm type or optional fuel injection
Fuel Pump:
Auxiliary external pneumatic (12VDC electric pump when fuel injected)
Lubrication:
Fuel mixed with oil @ 50:1
Rotation:
Counter clockwise, viewed from output end
Starter:
Recoil or optional electric start - Note: Electric start only available in conjunction with belt re-drive
Cooling:
Free air Cooled by prop or slip stream (Optional fan cooling available on special order)
Weight:
35lbs including exhaust sys. - 40lbs W/re-drive - 45lbs W/elec. start
Reduction System:
4V belt drive available 1.8:1, 2.2:1, & 2.5:1 ratios.(Up or down pos.)
Drive Coupling:
Optional centrifugal clutch available (can not be used with belt drive)

Engine Print



Customer Photo Gallery


F33 installed in Earthstar Thundergull



F33 installed in Ison Air Nison Easy
Picture #1 Picture #2



Twin F33's installed in Para Ski PPC
Picture #1 Picture #2



F-33 on Backpack PPC
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F-33 installed in Skymaster PPC
Picture #1 Picture #2
Picture #3


F-33 installed in Para Ski PPC
Picture #1 Picture #2
Picture #3



F-33 installed in Trikasoarus
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Picture #3



F-33 installed in Trikasoarus
Rear View Top View
Side View


F-33 installed in Challenger 103 Ultralight
Picture #1 Rear View
Top View Left Side
Right Side



F-33 on BE-LITE
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Picture #3 Picture #4