1987 Johnson/Evinrude CU Outboards 35A thru 55 Service Manual, Page 70Get this manual
Trouble Check Chart (Cont TROUBLE POSSI BLE CAUSE AMOTOR ADJUSTMENTS Incorrect Propeli er Mounts looseloss of rubber bond Incorrect trim angle 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 Se ction High speed jets plugged Idle pick-up tube not touching front edge of high spe ed no zz le in venturi ACONTROL BOX AND CABLE CONNECTIONSSee Section Control box andor POwerhead connections BGEARCASE See Section Incorrect lubricant (OMC HI-VIS Gearcase Lube only) Faulty adju stment Shi ft rod connector misad justed Low oil lev Sh fter dog or spri ng damaged ALTERNATOR SYSTEMSee Section Faulty wiring Rectifier diodes damaged Shorted or open stator windings Regu Iator damaged ASTARTI NG 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 switch Jammed starte drive Damaged starter drive parts Wrong rotation (Bosch) brushes in wrong Worn brushes (stuck brush) Broken brush spri ngs Open circu it in solenoid Burned ommutator Broken field 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 pol pieces Bearing heads buckled