Lubrication System - Yamaha WaveRunner FX140 Service Manual

LUBRICATION SYSTEM

The MR-1 engine employs a dry sump lubrication system.
A scavenge pump is used to collect oil from the engine and deliver it to the oil tank.
A feed oil pump is used to send oil from the oil tank to the various engine components.
Cylinder
Crankcase
Oil strainer
Cylinder head
block
Breather
tank
Engine
Engine
oil tank
oil pump
(Scavenge)
Oil strainer
Cylinder head cover
Exhaust camshaft
Intake camshaft
Main gallery
Oil filter
Engine Check
oil pump valve
(Feed)
Fig. 28
28
Relief
valve