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http://www.ultralightnews.ca/ Page 12 of 36
The Ultralight News - your one stop Ultralight News.
2.3Hydraulic Installation:
The maximum suction height for the electric fuel pump is 500mm or 19 inches. (take into consideration the
changing attitude of the vehicle or aircraft i.e. takeoff or landing etc.).
The fuel pump should be installed close by the fuel tank, so the inlet suction pipe stays short. The supply has
to be calculated where the fuel pump can suck in a minimum of 120 L/H. (Recommended pipe diameter
minimum 10mm or 0.39 inches). All fuel-carrying components have to be installed with enough distance
from any hot component to prevent danger from fuel ignition or explosion. (ie. exhaust system).
Each fuel line has to have a pipe clamp installed for security. The fuel lines between the fuel filters and the
engine must be made of fuel durable material and resist a pressure of min. 6 bar. The fuel return line to the
fuel tank must have a diameter of 8mm or 0.312 inches to prevent back pressure.
With a double fuel tank system you must ensure that both fuel tanks are connected to each other in such a
way that uneven fuel levels do not occur from fuel return.
On dual fuel tanks which are controlled separately, you must have an overflow connection installed, or it
must have a fuel return valve that will direct fuel to the tank that is in operation so as not to deplete
operational fuel tank or create an overflow situation.
2.4Fuel injection installation
1.Install the engine according to the installation instruction.
2.Install the computer at a suitable place (pay attention to the length of the wire harness)
3.Install the wire harness according to the above-mentioned connections and connect the blue plug to the
computer.
Note: The blue plug can only be connected in one position into the computer.
4.Connect the power supply (red +) with the on/off switch. The supply line to the switch has to be installed
according to the above mentioned paragraphs. Connect the power supply ground (black -) to a ground or
even better, directly to the (-) negative pole on the battery.
5.Install the fuel pump (close to the fuel tank), and lay the pressure line from the fuel filter to the engine.
Secure them with the hose clamps.
6.Connect the supply line from the fuel tank to the suction connection of the fuel pump/fuel filter (large
pipe connection end) and secure them with the hose clamps.
7.Secure the relay supplied to a suitable location within close proximity of the fuel pump
8.The green and black wires from the harness are connected to the location points 85 and 86 of the relay.
9.Connect the positive (+) separate line from the switch to the location point 30 of the relay.
10.Connect from the location point 87 of the relay to the positive (+) connection on the fuel pump.
11.Connect from the negative (-) of the fuel pump to a negative (-) point of the battery. Please ensure all
connections are suitable for at least 8 Amp?s
12.Hook the throttle cable to the bell crank of the TBI (Figure 3.5-1 Position 5), page 24. Adjust the throttle
cable with the adjusting screw (Figure 3.5-1 Position 2) so that the throttle cable in the idle position has
some play (2-4mm or 0.078-0.156 inches) and secure with the locknut (Figure 3.5-1 Position 1). Make
sure that the idle stop (Figure 3.5-1 Position 5) nut is adjacent to the throttle stop (Figure 3.5-1 Position
3).
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