Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 128Get this manual
7Uneven Wear: Uneven wear could be caused by bent connecting rod in drill press and operation press at high speed while keeping connecting rod at 90 ang le to sloted shaft IMPORTANT: Clean connecting rod just enough to clean up bearing surfaces00 NOT continue to clean after markare removed from bea ring surfaces
a Uneven Wear Between Arrows
8If necessa ry, clean con necting rod bearing surfaces, as fo llows: aBe sure that "etc hed" marks kn ob side of connec ting rod (cran kshaft end) are perfectly aligned with "etched" ma rks on connecting rod capTighten connecting rod cap attach ing bol ts securely13197