Yamaha F225A Service Manual page 21

Ignition and fuel injection timing
Firing order : #1, #2, #3, #4, #5, #6
Injection order : #1 and #4 → #2 and #5 → #3 and #6 (group injection)
Crankshaft angle
Cylinder
Compression
Cylinder #1
Ignition
Injection
Intake
Cylinder #2
Ignition
Injection
Cylinder #3
Ignition
Injection
Exhaust
Cylinder #4
Ignition
Injection
Cylinder #5
Combustion
Ignition
Injection
Cylinder #6
Ignition
Injection
69J3D11
˚
180
120 ˚
TDC Combustion
Compression
TDC
Intake
Compression
Intake
Exhaust
Combustion Exhaust
Features and benefits
˚
720
Exhaust
Combustion Exhaust
Combustion
TDC
Compression
TDC Combustion
Compression
Intake
Intake
: Ignition spark
: Wasted spark
Intake
Exhaust
TDC
Compression
S69J1370
1-16
1
2
3
4
5
6
7
8
9