2001-2014 Honda BF/BFP8D, BF/BFP9.9D Outboards Shop Manual, Page 28Get this manual
BFBO-BFS.SD - Starter Motor and Engine Turn Slowly
[ 1Check the batteryAbnormal
Replace or charge the battery Connect the battery termin als securely or remove the corrosion
2Check the engine oil viscosityGood
[ Replace the engine oil
3.Connect the battery to the-starter motor directly and che whether the starter motor turnsDoes not turn Replace or overhaul the starter motor- Faulty brush holder or armature
Turns normally
Replace the starter magn et switch
dCHARGING SYSTEM Battery Under Charged
1.Check the battery condition and cable connectionNormal Abnormal