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    1986 75hp center main locking screw questions

    86 4cyl 75 hp merc. serial number 0B107213, There is a bolt between the carbs listed as a center bearing locking screw. It has a locking tab washer. Mine is loose and I cant find any info in the manual about this bolt, not torque specs what it does any thing. If i tighten it as tight as I feel...
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    cant get 80's merc 75 hp to idle correctly... to high and dies when put in gear

    I have been using this Forum for years and thank everyone for the great input that is given here. This is probably my first post because i usually find my answers just searching and reading but I am at a loss I have a 84 to 86 4cyl 75 hp merc. serial number 0B107213, compression 115. 120.120...
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