AquaCraft 46 BB Marine Engine - Manual (Page 4)

9. Check that the throttle is 1/8 open from the fully closed position.
Bring the electric starter into contact with the spinner and depress the
starter switch for one or two seconds. Repeat, if necessary. When the
engine fires, withdraw the starter immediately. If using a safety stick
to start the engine, flip the propeller counterclockwise using quick
flips. After 10 flips, if the engine fails to start there is a chance that
there may not be enough fuel in the engine. Remove the glow starter
and repeat step 7. If the propeller becomes difficult to rotate, the
engine has become flooded. If this occurs, simply remove the glow
plug and turn the engine upside down. Flip the propeller and the
excess fuel will drain out. Re-install the glow plug, re-attach the glow
starter and try starting the engine again. DO NOT ATTEMPT TO
START THE ENGINE WITH YOUR FINGERS.
10. Once the engine starts, remove the glow starter after 10-15 seconds.
IMPORTANT NOTE: Never place your finger over the carburetor
intake when applying the starter. Such an action will cause an excess
quantity of fuel to be forced into the cylinder and result in a hydraulic
lock that may damage the engine.
In order to perform adjustments as needed, the break-in procedure should
be performed with your engine and vehicle held securely in place.
To insure long life and good performance from your AquaCraft Pro .46
engine, you MUST break-in the engine. The break-in period is critical
for long life of the internal parts of the engine. This should be done
over the first 5 or 6 tanks of fuel.
Some Things to Remember During Break-In
1. Use the same fuel that you will use for normal running.
2. Resist the urge to accelerate and decelerate quickly.
3. Break-in puts stress on the glow plug and you can burn it out during
break-in. Make sure you have an extra plug or two on hand.
The First Tank
Your first tank of fuel should be running the engine at a very rich high-
speed needle valve setting. This allows the fuel to carry as much oil as
possible into the engine to lubricate the internal parts during the break-in.
1. Open the needle valve 3 turns out from fully closed
(counterclockwise). When closing the high-speed needle, close the
needle until you feel some resistance. DO NOT over tighten or you
will damage the engine.
2. Start the engine.
BREAKING IN THE ENGINE
3. Once the engine is started, open the high-speed needle valve
around 1/8 turn at a time, finding the setting where the engine just
barely runs. This may take a few times adjusting the needle. The
engine will perform sluggishly and stall from time to time – this is
normal during the break-in process.
4. Run the engine at a medium speed, periodically accelerating and
decelerating. Do not give the engine full throttle at this time.
5. Continue running the engine until the tank is almost out of fuel. Do
not allow the engine to run out of fuel. This leans out the engine and
can cause overheating.
Tanks 2-6
Turn in the needle valve (clockwise) around 1/8 turn each tank from
the previous setting. You should notice that the engine performs better
during each run. After the 6th tank, you should be near to the peak
performance of the engine.
Adjusting The Idle
From time to time you will have to make adjustments to keep your
engine running smoothly. Factors such as humidity, altitude and
temperature will all affect engine performance. If your engine will not
idle smoothly, try adjusting the idle mixture screw. With the engine
stopped and the throttle barrel open, adjust the idle mixture screw so
that the gap between the idle mixture needle and the spray nozzle is
2mm-3mm (3/32"-1/8"). Start the engine and close the throttle to a
point just short of where the engine stops running. Pinch the fuel line.
If the engine speeds up, the mixture is too rich. Stop the engine and
turn the idle mixture screw clockwise 1/8 of a turn. Repeat this
process until there is no change when pinching the fuel line.
If the engine slows down when pinching the fuel line, the mixture is
set too lean. Richen the idle mixture screw 1/8 turn counter
clockwise. Once again, repeat this process until there is no change
when pinching the fuel line.
How To Stop Your Engine
BOAT USE: Just as squeezing the throttle trigger on your transmitter
increases power, pushing the trigger the opposite way decreases power.
Pushing the throttle trigger forward should close off the throat of the
carburetor completely, cutting off air intake and stopping the engine.
AIRPLANE USE: Set up the throttle linkage so that simply moving the
throttle trim down will close off the throat of the carburetor, stopping
the engine.
If the above methods fail, simply pinch the fuel line leading to the
carburetor. This will keep the engine from getting fuel and the engine
will stop.