rotax senior max evo 2018
BASELINE MAIN JET (ON VP C9 RACE FUEL): 124
BASELINE MAIN JET ON (93 PUMP FUEL W/ETHANOL): 125
FUEL / OIL RATIO: 50:1 (2.6 OZ / GALLON) OR (20.3 ML / L)
PIN HEIGHT: PIN 2
FLOAT HEIGHT: NEUTRAL TO SLIGHTLY RICH (MIDPOINT OR JUST BELOW MIDPOINT ON ROTAX FLOAT TOOL)
AIR SCREW: 3 FULL TURNS OUT
IDLE SCREW: 4 FULL TURNS OUT (IDLE AROUND 2,500 RPM WHEN ENGINE IS COLD, SHOULD NOT REALLY IDLE WHEN HOT)
OPTIMAL WATER TEMP: 130 F / 54.5 C
SPARK PLUG: ROTAX GR9DI-8
SPARK PLUG GAP: .9 MM
UPGRADE FROM JUNIOR:
PARTS: Senior cylinder, Power valve assembly
ENGINE WORK: Replace cylinder, and reset squish if desired (Senior is 1.0mm vs 1.2mm for Junior)