SELVA MARINE Blue Whale 250 EFI Service Manual page 41

Description
DES
Shift cut
Over-revolution
6P23H11
Control
Detects the status of the DES control and
controls the engine speed.
Detects the status of the shift cut control and
controls the engine speed.
Detects the status of the over-revolution
control and controls the engine speed.
Feature and benefit
Engine condition
• When the overheat
warning or low oil pres-
sure warning is acti-
vated, the DES switch is
turned on and the warn-
ing buzzer is activated.
• When this occurs, the
ECM causes the cylin-
ders to misfire, injection
is cut off, and the engine
speed decreases to less
than 2,000 r/min.
Two cylinders misfire and
the engine speed decreas-
es so that the shift can be
shifted.
• When the engine over
revs and the engine
speed exceeds 6,449
r/min, all cylinders mis-
fire.
• When the engine over
revs and the engine
speed exceeds 6,199
r/min and is 6,449 r/min
or less, cylinders #2 to
#5, #3, and #6 misfire for
a short time.
• Normal operation when
the engine speed
6,199 r/min or less.
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