2003 Johnson ST 6/8 HP 4 Stroke Outboards Service Repair Manual, PN 5005471, Page 58Get this manual

2003 Johnson ST 6/8 HP 4 Stroke Outboards Service Repair Manual, PN 5005471, Page 58

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MAINTENANCE SUBMERGED ENGINES Every 30 minutes operate outboard at full throttle for one minuteDO NOT exceed recommended maximum engine RPMto returning the outboard to serviceElectric starters should