1989 Johnson Evinrude "CE" 9.9 thru 30 Service Manual, P/N 507754, Page 51Get this manual
Trouble Check Chart (Cont TROUBLE 5POOR PERFORMANCE ON BOAT POSSI BLE CAUSE AMOTOR ADJUSTMENTS Incorrect Propel Ier Mounts looseloss of rubber bond Incorrect tri angl Remote controls incorrectly adjusted BVENTILATION Protruding hull attachments Keel too long Bent propeller (vibration) Transom too high CBOAT Improper load distribution Marine growth on bottom Added weight (water absorption) Hook in bottom Catamaran (single engine)venturi effect DCARBURETORSee Section High speed jets pi ugged Idl pick-up tube not touching front edge of high speed nozzle in venturi ACONTROL BOX AND CABLE CONNECTIONSSee Section Control box andor power head connections BGEARCASE See Section Incorrect lubri cant (OMC HI-VIS Gearcase Lube only) Faulty adjustment Shift rad connectar misadjusted Low oil leve Shifter dog or spring damaged AALTERNATOR SYSTEMSee Sect ion Faulty wiring Recti fier diodes damaged Shorted or open stator windings Regu Iator damaged ASTARTING CIRCUITSee Section Weak or shorted battery Loose or corroded battery connections Throttl advanced too far Gear sh ft not in neutral Defective neutral start switch Defective key swi tch Jammed starter drive Damaged starter drive parts Wrong rotation (Bosch) brushes in wrong Worn brushes (stuck brush) Broken brush spri ngs Open circuit in solenoid Burned commutator Broken fie ld terminal Shorted or open windingsarmature or field 20 AMPFuse blown BEXCESSIVE STARTER CURRENT DRAWSee Section Worn or dry armature shaft bearings Excessive friction in engine Brushes not seat ng Dirty or corroded commutator Loose pole pieces Bearing heads buckl ed