2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 24Get this manual
GEN INFO
General information
Over-revolution control If the engine speed exceeds 4,500 rmin, while the shift is in neutral, ignition is stoppedThe various stages of ignition cutoff are shown in the table belowIgnition cutoff cylinder in neutral Set speed (rmin) 4,500 4,750Indicates misfire at either cylinder (once, due to simultaneously firing): Indicates misfire at both cylinders (twice continuous)If the engine speed exceeds 6,200 rmin, while the shift is in forward or reverse, the ignition is stoppedThe various stages of ignition cutoff are shown in the table belowIgnition cutoff cylinder in forward or reverse Set speed (rmin) 6,200 6,250 6,300 6,350 6,400 6,450Indicates misfire at either cylinder (once, due to simultaneously firing): Indicates 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 ignitionThis control is activated with the same engine speeds as with other control modesShift cutoff control If the shift cut switch is activated with the engine operating under 2,000 rmin, the system causes one or two cylinders to misfire in order to facilitate shiftingThe system causes cylinders #1 and #2, or #4 and #5 to misfire when the engine speed is over 850 rmin, and cylinder #1 or #4 to misfire when the engine speed is under 850 rmin#1 #2 #3 #4 #5 #6 #1 #2 #3 #4 #5 #6