Installation Manual ROTAX Engine type 582 UL Series

This Installation Manual for the ROTAX® aircraft engines type 582 UL Series should only be used as a general installation guide for the installation of ROTAX® engines into airframes. It should not be used as instruction for the installation of a ROTAX ® aircraft engine in a specific type of airframe or airplane. BRP-Rotax GmbH & Co KG does not assume any warranty or liability in this context.

ROTAX Engine type 582 UL Series Fuel contamination
Fuel contamination is a major cause of engine failure. The best place to avoid contamination is at the source. Once fuel is in your container, a very hazardous potential exists. Use a clean, safety and approved storage container. Filter all fuel entering and leaving this container. Do not over-fill container, allow for expansion.

ROTAX Engine type 582 UL Series System description
The carburetors are supplied with fuel by the fuel pump provided with the engine. The pump is actuated pneumatically via an ,impulse line leading from the nipple on the crankcase to the fuel pump. This line should not be longer than 500 mm (20 in.) and must be of stiff and fuel-resistant material.

The fuel pump should be installed in a cool place (not on the engine itself) with the small vent bore near the impulse connection towards the bottom. This bore drains oil condensate from the pump diaphragm chamber. If possible, the pump should be located below the fuel tank level. If the fuel tank is considerably lower than the engine, an electric pump should be used. This pump is to be connected in parallel as in case of series-connection the fuel pressure would be excessive.

The electric pump must produce a pressure of minimum 0.2 bar (3 psi), and together with the pneumatic pump max. 0.5 bar (7 psi) resp. max. 0.4 bar (6 psi) in case of a diaphragm carburetor, and must allow free flow-through, even when switched off. A suitable fuel filter of 0.15 mm mesh size must be fitted between pump and carburetor. Do not use paper filters. The fuel tank must have a drain cock for condensed water. A screen of 0.3 mm mesh size should be fitted to the fuel line in the tank. By no means the normal fuel flow should be restricted.

National regulations may require a fuel cock to be fitted even if the fuel tank is below the carburetor. The carburetor needle valve must not to be used as a fuel cock.

CARBURETOR
The carburetor can be adjusted by jet replacement of various approved sizes, and by adjusting idle air/fuel mixture screw, carb piston stop adjustment, needle sizes, and needle position. The air/fuel mixture at idle speed is adjusted by the air adjusting screw. The idle RPM is adjusted by the carburetor piston adjustment screw.

NOTE
These idle adjustments interact, so adjusting one may require minor adjustment of the other.

Replacement of parts should be done only after proper trouble shooting has been carried out and then, by an experienced two cycle mechanic. Ensure that throttle cable and linkage do not stick and that carb piston valve can be fully opened and closed . Minor cable backlash can be adjusted at cable adjustment screw and lock nut.

Be certain that throttle linkage is not affected by engine or airframe movement. This will change throttle settings.

Air intake filtration and/or noise reduction devices must be in place for proper function. See section on special operating conditions. Special operating conditions, such as severe climate or altitude change may require different jetting. Contact your authorized ROTAX aircraft dealer or their independent Service Center.