2003+ Mercury Mariner 225 HP EFI 4-Stroke Service Manual, Page 558Get this manual
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Available Shim Thickness0.10 mm, 0.12 mm, 0.15 mm, 0.18 mm, 0.30 mm, 0.40 mm, and 0.50 mmExample: If "T3" is 0.75 mm, then the pinion shim is 0.72 mmIf "T3" is 0.71 mmthen the pinio