Fan? Cool.. that doesn't show up on my OPS literature, but it's probably too old. I wonder if it is indeed timed for the mid 20's then? If so then that's a nice score! If it follows OPS's other displacements in that sense, then it would share the p/l set with the marine version and be a snotty little devil. Pretty slick engine for the SJ-2! Or.. you know..