Honda BF50 (5HP) BF5A Outboard Motors Shop Manual., Page 14Get this manual
IGNITION SYSTEM HARD STARTING
Test the spark plugPlug gap: 0.7-0.8 mrn (0.027-0.031 in)
No spark
Check again with new spark plugI
Faulty spark plugSparksnew spark plug Install
Check again with new spark plug capNo spark-
Faulty spark plug cap Install new spark plug cap
Disconnect the black wire from the engine switch and recheckNo spark