™
Operator's Manual for BT-32B
Specifications for BT-32B
Displacement: |
1.95 cu in [34cc] |
Horsepower: |
2.2 hp @ 10,000 rpm |
Ignition Style: |
CDI Automatic |
|
Ignition Timing™ |
R.P.M.: |
1200 - 10000 rpm |
Fuel: |
Gas/2-cycle engine oil |
Weight w/Muffler: |
4.5 lb [2.1kg] |
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.
Entire Contents © Copyright 2009 |
FJIZ1165 for FJIG0033 V2 |
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.
•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.
•Do not use silicone fuel line because it will be attacked by the fuel. Use vinyl or neoprene rubber fuel line.
•Always secure the fuel line away from the cylinder head. The engine’s heat can damage the fuel line.
• Never touch the engine after a run. The engine will be hot and it may burn you.
•Before transporting your model, remove all the fuel from the fuel tank and fuel lines.
•Always use high quality oil intended for 2-cycle engines.
•Use only low-octane, alcohol-free gasoline.The carburetor diaphragm will gradually deteriorate if you use gasoline with alcohol.You will need to replace the diaphragm in about 80 hours of operation if you use gasoline with alcohol.
•Muffler pressure to the fuel tank is not required.
•Do not install your throttle servo or kill switch servo inside the engine compartment. Doing so could cause radio interference. Install all electronic radio devices at least 12" [305mm] away from the engine. The throttle pushrod should be non-metallic.
•In case the engine is not to be used for more than a month, drain the fuel tank and remove any fuel from inside the carburetor. Do this by running the engine at idle until it quits by running out of fuel. Keeping gasoline inside the carburetor over an extended period of time will damage the diaphragm valve and clog passages inside the carburetor.
•Because the carburetor is more complicated than those used in glow engines, keep the fuel clean by using a fuel filter. Use a filter intended to be used with gasoline engines. Metal filters intended for glow engines are too coarse and will not screen out finer particles. Always filter your fuel by using an appropriate filter before putting it into the airplane’s fuel tank.
•If you intend to run this engine on an engine stand, or on any other rigid mount, use rubber mounts. The crankcase and other parts of the engine may crack if you do not provide some kind of vibration absorption mechanism. A rubber mount is not necessary if the engine is mounted on a model airplane.
•Do not operate the engine in a closed room or where ventilation is not adequate.
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•Gasoline is extremely flammable. Keep it away from an open flame, excessive heat or sources of sparks. Do not smoke near the engine or the fuel tank.
•This engine was designed for use in a model aircraft. Do not attempt to use it for any other purpose.
•Always install a kill switch that can be operated both manually and through the RC transmitter.
AUTOMATIC IGNITION TIMING MODULE
The BT-32B engine ignition system is a combination of an electronic system and a mechanical system. The working principle for the automatic ignition timing module is that it gradually advances the ignition timing as the ignition pulses increase with increasing engine rpm. The mixture is ignited when the piston is near top dead center for idling and the timing is gradually advanced as the rpm increase.
PREPARING THE ENGINE
1. Check to see that all screws and bolts are tight. Check carefully for any cracks, broken or missing parts. Tighten or replace before proceeding.
2. Install the prop shaft on the flywheel using three 1" [25mm] Socket Head Cap Screws.
3. Install the engine mounts on the engine using four 1/2" [12mm] Socket Head Cap Screws.
The recommended spark plug is a Champion RCJ-6Y or 7Y. To avoid improper operation or possible engine damage, do not use any other type of spark plugs. The plug gap should be 0.016" to 0.024" [0.4mm to 0.6mm]. If the plug gap is incorrect, adjust it with a spark plug gapping tool, wash it with gasoline and allow it to dry completely before you reinstall the plug in the engine.
Note: If you want to check if the spark plug works, remove the spark plug from the engine, connect it to the coil and make sure the metallic threaded end of the spark plug touches the engine. Spin the propeller rapidly through top dead center and check for a spark. This procedure only works in a dark room as there is too much light outside to see the spark. Also, the propeller needs to be rotated at about 500 rpm for the spark to be visible.
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The various spark plug manufacturers have much information on their web sites regarding spark plug performance and health. For more information, check:
http://www.championsparkplugs.com/sparkplug411.asp
PROPELLER
Always use a well-balanced, high quality propeller.
APC 18 x 8 (7900 rpm Standard Muffler)
APC 18 x 8 (8300 rpm Power Muffler)
APC 16 x 12 (7300-7700 rpm)
Bolly Carbon 18 x 10 (7700-8000 rpm)
Test Conditions: Temperature 50°F (10°C) Humidity 40%
New engine with 90 minutes break-in running No cowling, but with plastic spinner
40:1 standard gasoline/oil mixture
INSTALLING THE FUJI-IMVAC BT-32B ON YOUR AIRPLANE
Note: The Fuji-Imvac BT-32B must be installed on a 3/8" [9mm] lite ply firewall or on a 1/4" [6.4mm] birch ply firewall. The firewall must be securely glued to the airplane. Use triangle stock and pin the firewall with hardwood dowels to reinforce the firewall glue joints. Never install the Fuji-Imvac BT-32B onto a firewall thinner than specified because it may fail due to the power of the engine.
1.Use the supplied template (on the back cover of this manual) to drill the engine mounting bolt holes and the necessary clearance hole on the firewall.
2.Install the engine on the firewall using four 10-24" x 3/4" [5mm x 19mm] socket head cap screws, four 10-24" [6.4mm] flat or lock washers and four 10-24" [6.4mm] blind nuts. Use some thread locking compound, such as Great Planes® Pro™ Thread Locking Compound (GPMR6060), on the screws.
3.Install the fuel tank in the airframe. Use only gasoline-safe fuel lines. One line should go to the carburetor and the other is to be used as a vent. You can fill the tank by using the carburetor line as fill line if you have access to it or install a third line to be used as fill line.
4.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.
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5. Install the throttle servo at least 12" [305mm] away from the engine. Make sure that you get the carburetor’s full range of rotation with your servo travel. If you wish you can also install a linkage to the butterfly choke.
6.Cut all necessary clearance and cooling holes in the cowl.
7.Make sure the cowl is secured to the airplane and that the spinner to cowl clearance is at least 1/8" [3.2mm].
BEFORE OPERATION
1.Prepare only the amount of gasoline needed. Aged gasoline could damage the engine and cause it to overheat.
2.If the engine was just run, make sure you allow enough time for it to cool down before you run it again. Also, wipe off any residue the engine may have thrown on the airplane on the previous flight.
3.Check to see that there are no foreign objects in the path of the propeller. Secure any loose articles of clothing so they cannot be drawn into the propeller.
4.Go through the safety tips and warnings at the beginning of this manual to ensure a successful and safe engine run.
5.Fuel the airplane with the adequate gasoline mix.
BREAK IN THE ENGINE
•To break in your Fuji-Imvac BT-32B you need to run the engine for about one hour with a fuel mixture that contains a 25:1 (4% oil) fuel/oil ratio.
•Do not adjust the high-speed needle on the carburetor to break in the engine. If you do so, carbon will accumulate in the spark plug and that will make ignition difficult.
•Do not run at full power for extended periods of time while breaking in your 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-32B while flying your
airplane. Just make sure you observe all recommendations above.
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