Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 464Get this manual
IGNITION SYSTEM
3Measure: Pulser coil output peak voltage Below specification Replace the pulser coil6 model Output peak voltage WG-B rmin Cranking Opened Closed 4.0 3.5 1,500 11.0 3,500 23
10 model Output peak voltage WG-B rmin Cranking Opened Closed 4.0 3.5 1,500 11.0 3,500 23