ULPOWER UL350 Operating Manual

Also see for UL260: Operating manual

ULPOWER UL350 Operating Manual Manual pdf 21 page image

Operating Manual ULPOWER UL260,UL350,UL390,UL520M0310: OM 260 - 520A01 Revision No: 00 Date: 2019-04-01 Page: 19 of 22Abnormal operation WARNING: At unusual engine behaviour, follow the guidelines below and perform the necessarymaintenance and/or checks before next flight. All problems andmaintenance/repairs/replacements carried out should be noted in the enginelogbook.Abnormal running on ignition checkIf you notice a substantial difference between running the engine on 1 ignition coil or on 2 ignitioncoils, please follow the procedure below .Find out what ignition coil is causing the difference. If one cylinder stops firing : check ignition lead and sparkplug of the corresponding cylinder andcoil. If two cylinders stop firing : check ignition coil, it's connection or wiring loom from ECU to thecoil. If all cylinders stop firing : check ignition coil, it's connection or wiring loom from ECU to the coil. Attention: The engine needs only one ignition system to function properly. The second systemis used as an emergency backup. Operating the engine on one ignition system onlyreduces redundancy/safety, not the power output.Sudden engine stop WARNING: If prior to sudden engine stoppage no abnormal noise indicated internal damage tothe engine, try to restart the engine, otherwise conduct power-off emergencylanding.Before restarting the engine, check the following: sufficient fuel level ? open fuel tap? master and ignition switch on? fuel pump switched on? fuel pressure? electrical system working ? sufficient battery voltage ( if necessary switch off all non essential electrical consumers)If you had to do an emergency landing because the engine did not restart, or abnormal noiseindicated possible internal damage to the engine, perform the daily/pre-flight checks (as statedbefore) carefully to pinpoint the problem. Check fuel for possible contamination. Rectify theproblem if possible or send the engine for inspection/overhaul to a ULPower authorised service-centre.Any sudden engine stop should be entered into the logbook, stating the possible reason.Reaching maximum engine speedEngine is equipped with an electronic rpm limiter. When reaching maximum engine rpm, the enginewill seem to hold back and slightly sputter. Throttle back to reduce engine speed.