1997 Johnson Evinrude "EU" 125C, 130, 200, 225, 250 90 LV Service Manual, P/N 507269, Page 39Get this manual
7Inspect propeller shaft seals for evidence of leakageReplace if necessary8Drain and refill gearcaseLubricate all components of engineSee Lubrication, this section9Check propeller conditionReplace if damaged10Retorque all screws and nuts to specifications11Run engine in test tank with correct test propellerCheck cooling system operation12To remove carbon deposits from combustion chambers and pistons, inject OMC Engine TunerLet tuner soak in engine between three and sixteen hoursAfter soaking, run engine at fast idle (1500 RPM) for at least 15 minutes at normal operating temperature INote During engine operation, carbon can build up on internal