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BF-25EI
BF-34EI

4-Stroke Engines

When you combine quality Fuji-Imvac engine technology with the performance advantages of a 4-stroke, you've got a sure-fire power plant for scale pilots!

Four-stroke engines boast these advantages:

  • Incredible fuel economy — less than half the fuel consumption of a comparable 2-stroke engine, for twice the flight time per fill at half the cost.
  • Amazingly quiet operation — making them welcome even at the most noise-sensitive flying fields.
  • The ability to maintain a consistent rpm range at all times - for delivering the realistic speeds and performance that giant-scale modelers demand.
  • Includes EIS (Electronic Ignition System).
  • High Torque
  • Swings bigger props than 2-stroke engines.
  • Excellent power to weight ratio.
  • Needle settings are not affected by engine heat.

oil pan
No more oil-gas mixing! Parts are lubricated by a constant flow of ultra-low viscosity oil from a pan on the bottom of the engine. A 3.4 oz (100 cc) bottle of oil is included.
throttle control
Like all Fuji-Imvac engines, Fuji-Imvac 4-strokes offer the smooth, pinpoint throttle control of a Walbro butterfly carb. Fine-tuning the idle, low- and high-speed screws takes only a slotted screwdriver and a few seconds.
4-stroke cut-away
The BF-25 and BF-34 are gear driven engines, which make these powerhouses more reliable.

Electronic Ignition System   3-year warranty

Fuji-Imvac's Electronic Ignition System offers these benefits to gasoline modelers:

  • EASY STARTING — requiring much less effort to flip the prop.
  • MORE DEPENDABILITY — first-time starts are more the rule than the exception.
  • LESS WEIGHT — which reduces vibration and rotating mass on the crankshaft.
  • EASY SETUP — installation that's virtually as easy as "Plug and Play".
  • CONVENIENCE & LOW COST — the engine and EIS unit are together in one package.
  • BETTER PERFORMANCE — due to higher rpm.
 		Electronic Ignition System

SPECIFICATIONS

BF-25EI 25 cc 4-Stroke Engine
Stock Number: FJIG0225
Displacement: 1.5 cu in (24.5cc)
RPM Range: 1,400-9,000
Output: 1.6 hp @ 7,500 rpm
Weight: 4 lbs (1.8kg)
Recommended Carbon Props: 18x8, 20x6
Includes: Walbro carburetor, Electronic Ignition System (EIS), Champion RCJ6Y spark plug and wrench, muffler and mounting hardware, prop flange, bolt
Requires: regular unleaded gasoline, engine oil, prop, engine kill switch, 4.8V NiCd or NiMH battery pack


BF-34EI 34cc 4-Stroke Engine
Stock Number: FJIG0234
Displacement: 2.1 cu in (34cc)
RPM Range: 1,000-7,500
Output: 2.0 hp @ 7,500 rpm
Weight: 4.9 lbs (2.0kg)
Recommended Carbon Props: 18x8, 20x6
Includes: Walbro carburetor, Electronic Ignition System (EIS), Champion RCJ6Y spark plug and wrench, muffler and mounting hardware, prop flange, bolt
Requires: regular unleaded gasoline, engine oil, prop, engine kill switch, 4.8V NiCd or NiMH battery pack
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