Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 120Get this manual

Mercury Mariner 4, 5, and 6HP 4-Stroke Factory Service Manual, Page 120

CYLINDER HEAD
4Place rag under the cylinder head to support the valvesUsing suitable box end wrench, depress valve spring to release valve keepersRemove keepers (2), valve spring retainer, valve spring and valve spring seat

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