7
LSN:
You want your LSN set so that when the motor is idling
it will run for a few minutes without quitting. One way to
determine this is to pinch the fuel line with fi ngers about 1"
[25mm] from the carburetor as the engine is running at idle.
If the motor stops instantly as you pinch the line, your LSN
is set too lean. Turn the needle out 1/2-turn and try again. If
your engine slowly picks up speed and after 10 seconds or
so quits, you are likely just a tad rich. It’s a good idea to let
the engine run for a minute or two between pinch tests. This
way you can be certain the new setting has taken effect.
Spray Bar:
Adjusting the spray can only be done after the
engine is fully broken in. What you want to achieve is a
smooth transition from idle to full throttle. Loosening the two
screws located on the side of the carburetor that hold the
spray bar will allow you to rotate the spray bar to optimize
the mid range. Moving the spray bar even a tiny amount (a
few degrees) can have a large effect on the way the engine
runs. It will not only affect the midrange but the top end and
the idle as well, so only move it a small amount at a time.
Turning the spray bar clockwise will richen the mixture and
counter clockwise will lean it, but only to a point. When the
spray bar is turned clockwise further than 20° it will start to
go lean again. Too far counterclockwise (a full 40°) and the
engine just will not run well at all.
Operating your Alligator Tours Airboat
POWER UP AND POWER DOWN SEQUENCE
It is important to follow the below sequence each time you
operate your boat.
Power up before a run:
1. Fill the fuel tank.
2. Turn on the transmitter.
3. Turn on the Receiver (switch located on the top of the
boat’s radio box)
4. Attach the glow igniter to the top of the glow plug.
5. Start the engine using an electric starter.
6. Remove the glow igniter and let the motor warm up.
Power down after a run:
1. Retrieve the boat.
Do not touch the engine or muffl er!
2. Turn the receiver switch off.
3. Turn off the transmitter.
BREAKING IN YOUR ENGINE
Your SuperTigre .34 engine uses ABC construction. ABC
stands for:
A
luminum piston operating in a
B
rass material,
C
hrome plated sleeve.
You don’t want to run the motor too rich during break in
(running in). Operating the motor too rich will not allow the
internal parts to warm up correctly. In doing so the piston and
liner might not get properly seated. Lean it until it is running
just on the edge of what is known as the 4 cycle - 2 cycle
break, and then gradually work leaner with each run (just a
click or two). You should also use a fuel that contains castor
oil in the lubrication mix. Castor oil helps the engine run
better and is a better overall lubricant for our ABC engines.
Full-synthetic fuels have been known to cause diffi culties in
the operation of ABC model engines. Once properly broken
in, your ABC-type engine will serve you well and deliver
reliable performance for years to come.
