Φ43.6mm x 2
33.6mm x 2
100.3cc
Acro-2st 70cc class
Scale-2st 70cc-100cc class
25” x 12“ ~27” x 10”
Bore
Main body : 4,040 g / Mufflers : 180g / Ignition : 160g
Stroke
Disp
.
Weight (Approx.)
RPM range
Approx.
1,000-6,000rpm Max on ground Approx. 5,500-6,000rpm
Propeller
CM-6
Plug
Optional parts
Applications
Battery for ignition system
Voltage:6-8.4V, greater than 1,000mA
・Limit gauge (0.1t) for tappet adjustment 1pc
・Spanner for tappet adjusting lock nut
1pc
・Carburetor adjustment bar
1pc
・Spark plug[CM-6](Attached to the engine) 2pcs
・Muffler set
1set
・Choke bar
1pc
・Ignition system (w/sensor)
1set
・Muffler bracket
1set
・Plug wrench
1pc
・Stand off mount
1set
・Hexagonal wrench
1pc
Specifications
FG-100TS Instruction Manual
2. Ignition
●Ignition arrangement- Place the main unit as far from other electrical
devices as possible.
(1) Plug cord(meshed high tension cord)
2 cords compatible for left/right cylinder. Insert the cap deeply into the
plug to make sure it will not come off.
(2) Sensor cord
Connect with the cord from the sensor attached to the engine.
(3) Battery cord (black / red cord)
Use a fully charged battery that has adequate spec. (6-8.4V, more than
1000mA is recommended.). Between the battery and main unit, make
sure to set a heavy duty switch whose capacity is higher than 3A.
(4)Tachometer cord
Connect the digital tachometer (Option). Otherwise the connector is
normally vacant.
Plug cap
Switch(more than 3A)
Sensor
(2)Sensor cord
(1)Plug cord
Main unit
(3)Battery
cord
(4)Tachometer cord
Recommended battery
Voltage : 6-8.4V
Capacity : 1,000mA~
Standard
accessories
1. Fuel
●The fuel is mixture of regular gasoline or high-octane gasoline and high-quality 2-stroke engine oil.
●[Example of oil recommendation]
・ Klotz KL-200 Original Techniplate
・ Deluxe Materials PowerModel 2T-S etc.
●Be sure to use the mixture “gasoline : oil =15~20 : 1” by volume ratio. (Ex. 1000ml of gasoline should be mixed with more than 50ml of oil ).
●During the break-in process,
use 15:1 mixed fuel
to ensure the best lubrication for initial running.
●Any damage caused by the fuel used, in which the oil ratio is lower than 20:1 will not be covered by warranty.
●Do not use gasoline containing ethanol. It may cause not only power loss but also corrosion inside the engine.
Firewall
Stand off mount
Hollow out
referring to
the figure
Fuel tank
Fuel
Level
To Outside of the plane
Vent line
Fuel supply to carburetor
Fuel filler line
Vent line
Gasoline-compatible
tank stopper
Gasoline-compatible tubing
Filter with weight
Set the center of the carb
slightly above the fuel level
Close as possible
3. Propeller
●Recommended propeller is Mejzlik 26 x 12.
●Use a well-balanced one. Never use the propeller that has been
scratched or damaged even if slightly.
●Open a hole exactly in propeller hub (boss) in advance as shown in
the right figure using drilling tool and propeller washer.
●Pass the propeller through the shaft and tighten the six bolts
inserting the propeller washer in the order of diagonal. ※The
appropriate length of the bolts may be different depending on the
thickness of the propeller hub (boss). Depending on the propeller
and spinner backplate you use, use M5 x 0.8 bolts with length that
protrude 15〜18mm. (Screw length of standard accessory is 55mm)
●As the propeller is compressed slightly, tighten the 6 bolts every hour
of operation.
6 x 5.2
P.C.D.29mm
Center 10
Spinner
backplate
Propeller
Propeller
washer
15~18mm
M5x0.8 bolts
●As shown in the fig, pass the choke bar (with M3.5 thread on its tip) through the hole
in the cowling. Then turn the bar to insert into the M3.5 internal thread at the center
of the throttle lever.
●Fully close the throttle and pull the choke bar and fix it with a clip or clamp as shown
in the fig so that it may not go back to the previous position.
●Grasp the prop by hand and turn it several times in the direction of normal operation
(CCW) until the carburetor generates hissing-like sound. After hearing this sound for
about 5 times, quickly flip the prop approximately 10 times.
●Remove the choke bar. Then power on the ignition system and flip the prop quickly to
start the engine. If the engine doesnʼt start, repeat the choking procedure.
4. Method of choke
(No need when you use starter
)
※Choking is the means by which fuel is fed to the engine when you start it by hand flipping. Thus it is unnecessary when using starter. Starting
with a electric starter is recommended for safety.
●In advance, make a thin hole in the cowling to insert the choke bar / slow needle adjustment bar.
●During choking, be sure to turn off the ignition switch.
Cowling
Choke bar for insert
M3.5 screw
Throttle lever
Throttle valve
(Move to the left)
Slow needle
Choke bar
Temporary fixed
by a clip
5. Break-in
MOST IMPORTANT!!
●Before starting the engine, inject a suitable amount ( approx. 20〜30cc ) of engine oil into the
lubrication nipple on the crankcase using a syringe or pump while turning the propeller by
hand. After that, plug this nipple. As excess is discharged from the breather nipple, attach a
tube to the breather nipple.
●Prop-recommendation : Mejzlik-26x12.
●Use 15:1 fuel:oil ratio for break-in.
●
Never make the fuel mixture lean during Break-in.
It could cause seizure even during idling or
low speed running.
●Before starting the engine, open the main needle Approx. 3 turns open (CCW) from fully closed.
●Start the engine (using a starter is recommended for safety).
●Run for about 30 seconds at low speed to warm up.
●Open the throttle gradually up to over half open. In the meantime turn the main needle CCW.
Continue to turn the main needle CCW until the RPM declines,
keeping the throttle opened
over half.
●If opening main needle doesnʼt drop RPM, then open the slow needle too.
●Run in this very rich condition for 1 liter of fuel.
●Now “initial” break-in is done.
For CW
Open
For CCW
Make rich
Main
needle
Throttle
lever
Throttle
lever
Slow needle
Main needle
CCW
Rich
CW
Lean
6. Adjustment of carburetor after initial break-in.
◇Needle reference position (Set after initial break-in)
●Start the engine after adjusting the needle to the following reference value.
●Main needle：Approx.2.5~3 turns CCW from fully closed
●Slow needle：Approx. 4 turns CCW from fully closed (Then throttle should be fully closed)
●Actually, the best position of the needles vary depending on the prop, temperature, humidity and so
on. Please adjust as necessary after observing the engine performance during flight.
◇
Peak adjustment
●After starting the engine, warm up for approx. 30 seconds at low speed.
●Achieve the peak at full throttle.
→Turn the main needle CW gradually to the position where the RPM is greatest (the peak). Continuing to turn the needle CW past the peak
could lead to seizure so turn it slowly and carefully. If the RPM suddenly decreases after passing the peak,
instantly turn the main needle
CCW
to again increase the RPM. Otherwise it could damage the engine seriously.
●Once achieving peak RPM, return the throttle to low speed. Make a note of the position of main needle at the peak at that time. ( How many
turns you did CW based on the reference value. )
◇
Slow needle Adjustment
●
After achieving peak RPM, next is slow needle adjustment. Open the throttle from low RPM to full throttle quickly.
●Turn the slow needle CCW slightly if the engine hesitates for a moment or stalls before the engine reaches max RPM because the mixture is
too lean.
●Turn the slow needle CW slightly if the engine is slow to reach peak RPM (full throttle set) because the mixture is too rich.
●Adjust the slow needle as above until the RPM follows the throttle movement smoothly. The important point is to adjust the slow needle
AFTER
the main needle has been adjusted to its peak.
●Now break-in at ground level is done. Adjust tappets by the method described later.
◇
Pre-flight / Flight adjustment
●
When the slow needle adjustment is done, check the response by revving up from low speed to full throttle quickly several times.
●Open the throttle fully and turn the main needle CCW approx. 60〜90 degrees from the peak position. This is to make the fuel mixture richer
in the air where the RPM get higher than on the ground.
●After all adjustments are made, fly your aircraft and fine tune the engine according to the situation. Basically tuning should be done with the
main needle. Readjustment of the slow needle is rarely needed if the first adjustment of the slow needle has been done successfully.
ver. Aug, 2018
7. Tappet adjustment
The valve clearance should be checked and adjusted after break-in and every time after two hours while the engine is cold. Before adjusting
tappet gaps, tighten up the screws around cylinders etc.
2. Loosen the lock nut and adjust
the gap by hexagonal wrench
until you get the correct gap for
both of intake & exhaust.
3. Once the gap is set, tighten the
lock nut and attach the plug and
covers. Then do the same
adjustment for the other cylinder.
4. Turn the prop by hand to check if the
compression is enough. If the gap is less
than 0, the valve is always opened
slightly and lose compression. Then
adjust again.
Correct Gap
Must not be inserted
Close to “0” with no limit
Limit gauge
(0.1mm)
1. Remove the spark plug and rocker
arm covers of a cylinder. Then
turn the prop CCW by hand to
place the piston at TDC of
compression stroke.
・Filter with weight [G36-154]
・Durable tube for Gasoline (1m) [G36-155]
・Tappet adjusting kit [120S-161] ・Digital tachometer [G17-167]
