Honda BF8, BF9.9 and BF10 Outboard Motors Shop Manual., Page 21Get this manual
Engine sometimes misfires r
Drain and clean: 6-18 and 6-19
4 Fuel line abnormal
Check for pinched or collapsed fuel tubeCheck whether the air vent knob of the tank is openCheck the primer bulb for air leakageCheck for clogged fuel line, fuel filter and connector
Replace: P6-16
1 Excessive engine speed
4 Overreving caused by mismatch