Yamaha F225A Service Manual page 24

GEN
INFO
Over-revolution control
If the engine speed exceeds 4,500 r/min, while the shift is in neutral, ignition is stopped. The various
stages of ignition cutoff are shown in the table below.
Ignition cutoff cylinder in neutral
Set speed (r/min)
4,500
4,750
: Indicates a misfire at either cylinder (once, due to simultaneously firing).
: Indicates a misfire at both cylinders (twice continuous).
If the engine speed exceeds 6,200 r/min, while the shift is in forward or reverse, the ignition is
stopped. The various stages of ignition cutoff are shown in the table below.
Ignition cutoff cylinder in forward or reverse
Set speed (r/min)
6,200
6,250
6,300
6,350
6,400
6,450
: Indicates a misfire at either cylinder (once, due to simultaneously firing).
: Indicates a misfire at both cylinders (twice continuous).
Dual-engine control
When two outboard engines are used, if one of the engines enters any one of the control modes, the
other engine will also control its ignition. This control is activated with the same engine speeds as
with other control modes.
Shift cutoff control
If the shift cut switch is activated with the engine operating under 2,000 r/min, the system causes
one or two cylinders to misfire in order to facilitate shifting. The system causes cylinders #1 and #2,
or #4 and #5 to misfire when the engine speed is over 850 r/min, and cylinder #1 or #4 to misfire
when the engine speed is under 850 r/min.
1-19
General information
#1 #2
#1 #2
#3 #4 #5
#3 #4 #5
#6
#6
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