2004 SR Johnson 2-stroke 40, 50HP Service Manual, Page 176Get this manual
OILING SYSTEM CYLINDER AND CRANKCASE OILING
CYLINDER AND CRANKCASE OILING
OilFuel Recirculation System
The recirculation system moves fluid from the bottom of the crankcase and deposits it into the intake manifold of the number cylinderThe fluid mixes with the airfuel mixture in the manifold to be burned on the next cycle
PRIMING
40150 PL MODELS
The oiling system of the outboard must be primed: After the initial installation of the outboard (predelivery)Whenever the oil supply to the OMS pump is disconnected or disrupted; and Whenever an oiling system component is removed or replacedRefer to OILING SYSTEM SET-UP on p51 and Oiling System Priming on p52 for additional information related to oil system priming