1988 Johnson Evinrude "CC" 9.9 thru 30 Service Manual, P/N 507660, Page 69Get this manual
Trouble Check Chart (Cont TROUBLE 3LOSS OF POWER {Providing Ignition OK} {Cont} EPOSSI BLE CAUSE OVERHEATING POW ERHEADSee Section Thermostats damaged Thermo cover or gaskets damaged Pressure con trol va lve damaged Ex haust cover gaskets lea king Head gaskets leaking {warped hea d} {water in cylinders} Water intakes obstructed Pump hou si ng bl eed re stri ted Wate passages obstructed Pump pi ate not sea ing (bottom) Pump mpell er damaged Motor too high on tran som Pump housing distorted {overheating} Pump hou si ng cover seal wo rn {driveshaft grooved} Water tub grommet damaged Pro peller hub slipping Bent or worn prope ller Bent gear hous ing or exhaust hou sing In co rrect propel er 4ENGINE MISFIRES ASPA RK PLUGSSee Section Cover inn er terminal damaged {te rminal po in ut of HTlead}Fau ty Ieads crossed leads Loose spa rk plugs (low torqu e) De fec ti ve spark plugs {cracked insu latorIncorrect spark pi ug BIGNITIONSee Section In correct timingLoose ri ng {connectors mprope rl jo neCoi Is damaged Arcing around ignition co il Loose connec ti ons to senso co il s, charge coils, ignition co il s, or on po we pack gro un lead Leads grou nding ut on se nsor co il s, charge coils, ig ni tio coilsor key sw tch Sensor coi Is Charge coi Is Powe packs Arc ing in key sw it CFUEL SYSTEMSee Sec tion Recirculation hose lu gged or pinched Recirculation nipple plugged Recirculation check al ve stuck open Recirculation hose not routed co rrect ly causing restriction Manifold heck va lve plugged or res tri cted Ca rbure or idl system ha fo reig particl es in passages Prim va lve seat has fo re ig particles sea and ill not shut offCarburetor fl oodi ngFue pump diaphragm leaking into rankc ase Primer ulb hec valve not operating