I have quite a few old Fuji engines and I came across the instruction sheet for one from the 50s.
HANDLING OF
FUJI ENGINE
FOR BEGINNERS
Glow engine is a small engine of 2 cycles and is started by a special plug using 2V battery. When its revolution reaches to perfect condition, electricity must be cut off from the plug as it rotates by compressed heat.
Control of fuel supply shall be done by adjusting of needle valve. Starting is obtained by revolving or propeller of flywheel by hand. It is designed to produce 9,000 to 15,000 rotations per minute.
Such high revolution of engine requires fixing of Fuji engine firmly on hard metal (hard & strong) to avoid coming-off or sliding. To give the engine perfect pitch and endurance, tuning for 20 to 30 minutes is necessary at slow speed using about 1” larger propeller than standard size and give about 1-minute highest rotations with gradual perssing of needle from slow to quick at the end of tuning. The position of fuel tank is better nearer to the engine keeping surface of fuel levelled with the needle valve.
As dust gets in from exhaust air hole giving or causing friction of cylinder and piston, the engine must be kept clean well washed with gasoline after used.
When it is used in free flight and is dropped from air, it must not be used as is, unless after well cleaned.
STARTING
The engine must be fixed on proper place as indicated by the safest way.
Fix plug with packing after well tested with electric battery as gas leaks or cause high compress ratio, if no packing is used.
Then fill into the tank
Repeat putting back of needle 5 timed from the point valve is closed. Close air vent hole with finger tip and turn propeller twice or so to bring fuel to the needle.
Put small quantity (about 2 or 3 drops) of fuel inside cylinder through exhaust air hole.
Connect one end of wire to 2 V battery either positive or negative
Connect other end of wire to the engine.
Turn propeller or flywheel in opposite way of clock by hand. Best position of piston at this time is where the piston stops by compression.
Bring rotation of engine by gradual closing the needle and stop at the highest. Then take off electric wire.
If engine stops after started, repeat operation from (5).
CONSTRUCTION OF FUJI ENGINE
Fuji is passed rigid standard inspection test and is preferred not to be dissected unless it is absolutely necessary
When fixing plug, use proper washer to avoid inefficiency by leakage of gas or cut-off of plug by high compress ratio.
Compress ratio of all Fuji engines is 6.5:1. If dissected, 0.2 gasket must be inserted, as compress ratio will differ by different thickness of gasket between crank case and cylinder, when put it up again.
The position of fuel nozzle when fixing needle valve, must be faced in right angle to the wall of fuel sucking hole. If not, short supply of fuel will not give continual revolution.
Gasket is placed between crank case and crank case cover to prevent gas leakage. So, please take care this is properly done, otherwise, causes a non-revolution.
If dust gets in the hole of nozzle, it will prevent the proper running of the engine, as the hole of the nozzle is very small In this case, send air through fuel pipe or put finger tip on the air sucking hole and turn the engine opposite to clock way.
Then dust comes out. Thus, take care to keep dust away from the engine.
FOR STORING
Each section of the engine must be thoroughly cleaned by gasoline etc, for if dust gets in during air flight or its running, it quickens wearing out by friction of cylinder and piston. After cleaned, put No 10 machine oil inside cylinder and air sucking hole, and give a few turns disconnecting the plug.
Fuel tank must be cleaned each time after used. Otherwise, remains of oil (waste or refues) may prevent proper running of the engine.
Cylinder must be covered with paper or cloth in storing to prevent dust to get in.
Topic: Engine Operating Instructions (Read 1837 times)