Fuji Imvac BT-86EI Operator's Manual

Fuji Imvac BT-86EI Operator's Manual

Engine fuji imvac bt-86ei

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·
Always use a balanced spinner and a balanced prop. An unbalanced spinner
and prop combination will cause high levels of vibration and may cause the
propeller shaft to break.
·
Always use a lightweight spinner on your engine. Lightweight spinners are
considered to be those with a cone wall of 1mm or less. Heavy spinners could
cause the propeller shaft to break.
·
Securely tighten the spinner and prop on the engine to prevent it from being
thrown off the engine while running.
·
Never use a prop that has hit the ground. Even though it may look good from the
outside, it may be cracked on the inside which may cause it to disintegrate while
in use. Do not use a nicked, cracked or split propeller.
·
Keep foreign objects away from the propeller. Make sure that nothing can be
"sucked in" by the propeller. Never start the engine on loose gravel or sand.
·
Keep onlookers away from the running engine, especially small children.
·
Do not attempt to stop the engine by throwing anything into the path of the propeller.
·
Make sure the fuel line is well-secured to the engine and to the fuel tank so that
it won't come off in flight.
Operator's Manual for BT-86EI
Manufactured by FUJI-IMVAC INC.
YOKOHAMA, 235-0005 JAPAN
Champaign, IL 61826 USA
www.fuji-imvac.com
Fuji-Imvac is not related to the original Fuji Engines sold by Mecoa.
SAFETY TIPS AND WARNINGS
SPECIFICATIONS
Displacement:
Output:
Ignition Style:
RPM:
Fuel:
Weight w/Mufflers: 7.5 lb [3.3kg]
: Hobbico, Inc.
(except Japan)
5.25 cu in [86.0cc]
7.5hp @ 8,500 rpm
Electronic Ignition System
1,100 – 8,500
Gas/2-cycle engine oil

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Summary of Contents for Fuji Imvac BT-86EI

  • Page 1 ™ Operator’s Manual for BT-86EI SPECIFICATIONS 5.25 cu in [86.0cc] Displacement: Output: 7.5hp @ 8,500 rpm Electronic Ignition System Ignition Style: 1,100 – 8,500 RPM: Gas/2-cycle engine oil Fuel: Weight w/Mufflers: 7.5 lb [3.3kg] Manufactured by FUJI-IMVAC INC. YOKOHAMA, 235-0005 JAPAN Worldwide Distributor : Hobbico, Inc.
  • Page 2: Parts List

    · Always install a kill switch that can be operated manually and with the R/C transmitter. PARTS LIST BT-86EI Engine Muffler Gasket (2) Electronic Ignition Module 5x22m m SHCS with Lock Washers 50mm EIS Propeller Flange with...
  • Page 3: Spark Plug

    24" x 8", 22" x 12" Carbon Prop During our tests, our Fuji-Imvac BT-86EI turned a Bolly 22" x 12" carbon prop at 7400. The engine was new with 60 minutes of breaking in. The test conditions were: Temperature 10°C [50°F], humidity 40%, elevation at sea level. Performance...
  • Page 4: Prepare The Engine

    Fuji-Imvac has developed a special oil to work with their engines. This oil is of extremely high quality and it has exceptional lubricating properties. This oil can be mixed with gasoline at much higher ratios than other engine oils which allows the engine to develop more horsepower and last longer.
  • Page 5 320mAh. INSTALLING THE FUJI-IMVAC BT-86EI ON YOUR AIRPLANE Note: The Fuji-Imvac BT-86EI must be installed on a 12mm [1/2"] lite ply firewall or on a 9.5mm [3/8"] birch ply firewall. The firewall must be securely glued to the airplane.
  • Page 6: Break In The Engine

    Make sure that the engine has adequate cooling. While breaking in, the engine may run at slightly higher temperatures. · If you wish to do so, you can break in your Fuji-Imvac BT-86EI while flying your airplane. Just make sure you observe all recommendations above. STARTING PROCEDURES There are four recommended ways to start the Fuji-Imvac BT-86EI: A.
  • Page 7 4. Rotate the propeller slowly about 10 to 20 times (more in winter) until fuel begins to be drawn into the carburetor. Another way to prime the engine is to rotate the prop clockwise from bottom dead center to top dead center (compression) and then counterclockwise back to bottom dead center repeatedly.
  • Page 8: Engine Adjustments

    ENGINE ADJUSTMENTS · Always make high- and low-speed needle adjustments with the engine shut off. Also make sure the ignition is OFF. · Adjust the needle marked “H” for high-speed Rpm. Adjust the needle marked “L” for low-speed Rpm. A. Normal high- and low-speed needle settings: It is not necessary to change the needle settings if the engine runs smoothly.
  • Page 9 Problem: The idle is not steady. Solution: Your low-speed needle “L” valve is too rich. Close it 1/8 turn and try again. C. High-Speed Adjustment: The high-speed rpm and transition performance is adjusted with the high-speed “H” needle valve. When adjusting, turn the screw about 1/8 of a turn each time. The position of the “H”...
  • Page 10: Replacement Parts

    REPLACEMENT PARTS To order replacement parts for the Fuji-Imvac BT-86EI, use the order numbers in the Replacement Parts Lists that follow. Replacement parts are available only as listed. Replacement parts are not available from Product Support, but can be purchased from hobby shops or mail order/Internet order firms. If you need assistance locating a dealer to purchase parts, visit www.greatplanes.com and...
  • Page 11 CRANKCASE PARTS LIST Key # Part No. Description 36..FJIG1003 ......Sensor Unit 19A ..FJIG7320 ......Shim 0.1mm 41..FJIG3910 ....Crankcase Assembly 19B ..FJIG7350 ......Shim 0.2mm 42..FJIG6300 ........Oil Seal 19C ..FJIG7380 ......Shim 0.3mm 43..FJIG3990 ....Crankcase Gasket 19D ..FJIG7410 ......Shim 0.4mm 44..FJIG3060 ..Ball Bearing 6201 A2C3 21..FJIG8520 ......
  • Page 12: Carburetor Parts List

    CARBURETOR PARTS LIST Key # Part No. Description K ..FJIG5790 ..Metering Diaphragm Comp. A ..FJIG5460 ......Inlet Screen L ..FJIG7630 ......Valve Spring B ..FJIG6990 ..... Pump Body Complete M ..FJIG5130 ....Hinge Pin Set Screw C ..FJIG7290 ........ Set Screw N ..FJIG5100 .........Hinge Pin D ..FJIG7110 ......Pump Gasket P ..FJIG3750 ......
  • Page 13: Engine Parts List

    ENGINE PARTS LIST Key # Part No. Description 84..FJIG3150 .... Carburetor Gasket 77..FJIG6090 ......Muffler Set 85..FJIG5990 ....Insulator Gasket 78..FJIG5940 ....Muffler Gasket 86..FJIG5520 ..Carb. Insulator Gasket 79..FJIG8280 ....Hex Bolt 5x16S 87..FJIG7140 ....Reed Valve Set 80..
  • Page 14: Engine Measurements

    ENGINE MEASUREMENTS 126mm 108mm 39mm 103mm 123mm 67mm 87mm 171mm 14mm 50mm 74mm 129mm 71mm...
  • Page 15 Entire Contents © Copyright 2009 FJIZ1189 for FJIG0089 V2...

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