1992-2000 Mercury Mariner 105-225HP outboards Factory Service Manual, Page 372Get this manual
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Powerhead Specifications Block
Dimension "B"in line with Piston Pin)
(105 Jet, 135, 150) DiaStandard 3.115 in .002 in(79.121 mm .051 mm) Dia.015 inOversize 3.130 in .002 in(7