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Fuji Xerox, FUJI FILM IMVAC BT-34B Manual

Summary

This comprehensive manual is essential reading for owners and operators of the FUJI-IMVAC™ BT-34B model aircraft engine. Designed for dedicated hobbyists and RC pilots, it provides crucial guidance on safe operation, advanced maintenance procedures, and preventative care. The guide details everything from proper fuel handling and prop installation best practices to understanding automatic ignition timing and identifying necessary replacement parts, ensuring your engine performs reliably in the air.

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Operator’s Manual for BT-34B

SPECIFICATIONS

Displacement: 34cc Horsepower: 3.2hp @ 11,000 rpm Ignition Style: CDI Automatic

Ignition Timing™

RPM: 1200 – 11,000 rpm Fuel: Gas/2-cycle engine oil Weight w/Muffl er: 4.1 lb [1.55kg]

Manufactured by FUJI-IMVAC INC. YOKOHAMA, 235-0005 JAPAN

Worldwide Distributor (except Japan): Hobbico, Inc.

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

• 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.

FJIZ0034 for FJIG0034 V2Entire Contents © Copyright 2009

Page Summary Contents For Fuji Xerox, FUJI FILM IMVAC BT-34B Manual

Page 1 Operator’s Manual for BT-34B SPECIFICATIONS Displacement: 34cc Horsepower: 3.2hp @ 11,000 rpm Ignition Style: CDI Automatic Ignition Timing™ RPM: 1200 – 11,000 rpm Fuel: Gas/2-cycle engine oil Weight ...
Page 2 • 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 fl ig...
Page 3 AUTOMATIC IGNITION TIMING MODULE The BT-34B engine ignition system is a combination of an electronic system and a mechanical system. The working principle for the automatic ignition timing module is t...
Page 4 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 high...
Page 5 5. Install a kill switch such as the Great Planes Gas Engine Ignition Switch Harness (GPMG2150). Install the kill switch servo at least 12" [305mm] away from the engine. INSTALLING THE FUJI-IMVAC...
Page 6 BREAK IN THE ENGINE • The break-in procedures for your engine will vary depending on the type of engine oil you will use. Please refer to the “Oil” section for fuel/oil mixture ratios and break-in tim...
Page 7 10. After starting, let the engine idle for two to three minutes. Open and close the throttle slowly until the engine runs smoothly at idle and at full throttle. Acceleration should also be smooth. 11...
Page 8 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 need...
Page 9 Problem: The idle is not steady. Solution: Your low-speed needle “L” valve is too rich. Close it 1/8 of a turn and try again. C. High-Speed Adjustment: The high-speed rpm and transition performance is...
Page 10 REPLACEMENT PARTS To order replacement parts for the Fuji-Imvac BT-34B, use the order numbers in the Replacement Parts Lists that follow. Replacement parts are available only as listed. Replacement pa...
Page 11 CRANKCASE Key # Description Stock# 19 Shim 0.2 .......................................................................................... FJIG7350 19 Shim 0.3 ............................................
Page 12 ENGINE/MUFFLER Key # Description Stock# 10 Funnel Complete ............................................................................. FJIG7640 25 Small Washer 5mm (2) .................................
Page 13 CARBURETOR Key # Description Stock# Carburetor ....................................................................................... FJIG3290 2 Inlet Screen ............................................
Page 14 MISCELLANEOUS Key # Description Stock# 1 Clutch Washer B ............................................................................. FJIG6810 3 Hex Bolt 5x25mm/WS (4) ..................................
Page 15 FUJI-IMVAC™ BT-34B MOUNTING TEMPLATE

Manual Details

Brand BT
Pages 16
File Size 231.62 KB
Published May 17, 2026
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Frequently Asked Questions

What fuel is recommended for the BT-34B engine?

Use only low-octane, alcohol-free gasoline and high-quality oil intended for 2-stroke engines.

How should I prepare the engine for long-term storage?

Before storing it longer than a month, drain the fuel tank completely and remove all fuel from the carburetor by running the engine at idle until it quits.

What is the safest type of propeller to use?

Always use a balanced spinner and prop. Do not use props that have hit the ground or are visibly cracked/nicked.

Where should radio control devices be placed?

Install all electronic radio devices at least 305mm (12") away from the engine to prevent radio interference.