Ultralight Aircraft Engine Troubleshooting Reports.

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Rotax 377, Rotax 447, Rotax 503, Rotax 582 ultralight aircraft troublehsooting reports.

Troubleshooting the Rotax line of two stroke ultralight aircraft engines.

UltralightNews.com

Troubleshooting the Rotax line of two stroke ultralight

aircraft engines.

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Exhaust, carburetor, fuel pump, and reduction drive are all obtainable, in various exhaust configurations and gear drive combinations. These factors have all contributed to its acceptance by manufactures and pilots. But like any other product used in today's market, especially one where the use is so varied, problems have occurred. Some of these problems can be traced directly to the manufacturer of the ultralight aircraft, others to the owner, and others to the engine. In an effort to make more pilots aware of some of the associated problems, and their possible solutions, the following is a synopsis of reported problems encountered by Rotax engine users, and some possible solutions.

These are general problems found in most cases with all the Rotax engines, in further reports we will deal with each engine separately. Fuel Supply: The Mikuni fuel pump is the primary pump used in the ultralight industry, and with the Rotax engine. The following is a list of items to be considered and adhered to: When mounting the Mikuni fuel pump make sure that it is no more than 11 inches away from the impulse outlet on the engine. Make sure that dual Mikuni fuel pump is mounted away from any heat source, and that it is positioned so that the vent on the Mikuni pump vacummn inlet is facing down. The vacuum line used to connect the Mikuni pump to the engine impulse outlet is of a much thicker wall thickness than regular gas line, and is not effected by heat. The fuel line and vacuum lines are generally exposed to sunlight in most older configuration of ultralights and it is suggested that they be checked on a regular basis for cracks, discoloring, or UV deterioration Yearly replacement is a good preventative maintenance approach.

Rotax 582 Bluehead ultralight aircraft engine with E drive and airbox silencer.

Dual Mikuni fuel pump should be used on all Rotax twin cylinder two stroke ultralight aircraft engines.

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