Service manual

90-898303
4-7
Operation of Oil Injection System
The oil injection system delivers oil mixture on engine demand, from 120:1 at
idle to 50:1 at wide open throttle.
Oil is stored inside a remote oil tank in the boat. This tank holds enough oil for
approximately 150 gallons of fuel at wide open throttle.
Crankcase pressure forces oil from the remote oil tank into the engine oil
reservoir. The engine oil reservoir feeds oil to the oil pump. The engine oil
reservoir contains enough oil for 20–25 minutes of full throttle running after the
remote oil tank is empty. The warning horn will sound if the oil level in the
engine oil reservoir is low.
The oil pump is ECM driven and pumps oil to the vapor separator tank where
it mixes with fuel supplied by the engine mounted pulse pump.
The ECM is programmed to automatically increase the oil supply to the engine
during the initial engine break-in period. The oil ratio during the first 120
minutes is 100:1 @ idle and 40:1 @ wide open throttle. After the first 120
minutes, the oil ratio changes to 120:1 @ idle and 50:1 @ wide open throttle.