More likely seized/hardened grease in the pivot bearings. Gentle heat and a throrough reapplication to the zerk fittings should help. If you maintain the engine well, and have done this in the past year, you can most likely ignore this suggestion.
As to the bleed question, usually there will be a release/bleed screw somewhere on the ram, but it varies from motor to motor. Someone who has a Mariner may be able to point it out better.
jky
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