Operating Manual ULPOWER UL260,UL350,UL390,UL520M0310: OM 260 - 520A01 Revision No: 00 Date: 2019-04-01 Page: 11 of 22AccelerationLimit of engine operation at zero gravity and in negative "g" conditionsMax. ....................................... 3 seconds at max. –0,5 gOil pressureMax. ....................................... 8 bar (115,0 psi) (cold start)Normal .................................... 2–5 bar (30–75 psi) — above 2000 rpmMin. ........................................ 1 bar (14,5 psi) — below 2000 rpm/above 900 rpmOil levelUL260 / UL350I / iF /iS / Ihps: Max. ................... 3,5 litres (3,7 quarts)Min. .................. 2,5 litres (2,6 quarts)iSA: Max. .................................. 4,5 litres (4,7 quarts)Min. .................................. 3,5 litres (3,7 quarts)UL390 / UL520I / iF / iS / Ihps: Max. .................. 4,5 litres (4,7 quarts)Min. ............................ 3,5 litres (3,7 quarts)iSA: Max. .................................. 5,5 litres (5,8 quarts)Min. .................................. 4,5 litres (4,7 quarts)Attention : The marks on the dipstick (min-max) are only valid in case the engine is level ! Installedin the plane, be sure the plane is level before checking the oil level.)Oil temperatureMax. ....................................... 120°C (248F)Min. ........................................ 50°C (122F)Normal .................................... 80-100°C (175-212F)Cylinder head temperatureMax. ....................................... 180°C (356F)Max. continuous ......................... 160°C (320F)Min. ........................................ 50°C (125F)EGTMax. ....................................... 880°C (1616F)EGT varies upon delivered power.Most important is that all EGT values are +/- equalECU environmentMax. ....................................... 65°C (149F)Min. ........................................ -40°C (-40F)