"Ok. I have a 1987 3.7 Merc &
"Ok. I have a 1987 3.7 Merc (470 block). Last year I spun a rod bearing. So I pulled it out, tore it down, had the crank turned and put it back together with new bearings. The shop said my crank was not bent. I had the rods checked (replaced 1 w/a cast piston...