BRP E250DHLSCS, Service Manual

Page: 195 / 396

193
OILING SYSTEM
COMPONENTS
9
Additionally, one oil distribution hose is routed to a
tee fitting at the top of the block, above #2 cylin-
der.
Oil Recirculation System
External hoses and fittings, internal cylin-
der/crankcase passages, and intake manifold
passages are used to recirculate any accumula-
tion of oil from various locations in the powerhead.
The movement of oil is controlled by check valves.
Cylinder Recirculation
Internal powerhead oil drain passages connect
the lowest point of the intake port area of the cylin-
der block to external thread-in check valves.
External hoses connect these check valves to a
hose fitting pressed into the top of the intake man-
ifold / throttle body. Intake manifold vacuum draws
any accumulation of oil from the intake port area
of the cylinders into the incoming air stream in
front of the top reed valve.
Check valves pressed into the crankcase below
#4 and #6 reed valve assemblies connect to
1. Rear oil manifold
006863
1
1. Check valves
004337
1. Recirculation hose
2. Hose fitting
004336
1
1 2