Yamaha FT50C Service Manual page 23

Starting control
When starting the engine, the timing is set to 5° BTDC until the crankshaft speed maintains 600
r/min for two seconds or longer.
9
1
5
1 Cylinder identification protrusion
2 Protrusion for cylinders #1 and #4
3 Pulser coil
4 Protrusion for cylinders #2 and #3
5 Pulser coil signal
6 Cylinder identification signal
Warm-up control
After the starting control is completed, the control transfers to the ignition timing based on the warm-
up map for three minutes. From the time the three-minute warm-up control has been completed, the
control transfers to the normal map.
1
5
0
1 Ignition timing (BTDC°)
2 Engine speed (× 1,000 r/min)
3 Warm-up map
4 Acceleration map
5 Normal map
62Y5A11
3
2
7
6
3
4
5
1 2 3
4
8
7 Starting signal (5° BTDC) for cylinders #1 and
#4
8 Starting signal (5° BTDC) for cylinders #2 and
#3
9 Rotating direction
4 5
2
Technical tips
S62Y1350
6
S62Y1360
1-18
1
2
3
4
5
6
7
8
9