Mercury Mariner Outboard 40/50/55/60 2-stroke Service Manual, Page 50Get this manual
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Specifications Type Spark Plug Type IGNITION SYSTEM Spark Plug Gap Firing Order Idle Maximum Timing Cranking Speed -Model 405060 -Model 5560 Seapro-Marathon 5000 RPM Model 405060 Model 5560 Seapro-Mar