BOMBARDIER SEA-DOO SPX 5838 1998 Shop Manual page 80

Section 04 ENGINE
Subsection 05 (TOP END)
F01D7HA
VALVE FULLY CLOSED
947 Engine
On this engine, the RAVE valves are controlled by
the Multi-Purpose Electronic Module (MPEM).
The MPEM measures 2 factors to control the
RAVE valves: engine speed (RPM) and its rate of
acceleration.
To open the RAVE valves, the MPEM activates a
solenoid which directs the positive pressure from
engine crankcase to the valves.
NOTE: A check valve on the pressure line elimi-
nates the negative pressure from the crankcase.
To close the RAVE valves, the MPEM deactivates
the solenoid which blocks the crankcase positive
pressure. The RAVE valves are opened to the at-
mosphere.
04-05-5