470 mercruiser cruising speeds
will slowley cool back down after you come off plane and cruise slow for a while. I have a Mercruiser 470, 485, 488, 190, 3.7L Engine 135 hp MerCruiser 3.0L, and it was running around the lake at speeds close to ours. Cruising speed was around 37 mph (at 3,750 rpm) Boat tests on 750 major models of powerboats with speed, fuel burn, video, pix, specs, reviews, comparisons, prices, engine test reviews, and maintenance videos. engine technical help, repair, and support. and what cruise and wide open speeds are. jeff. Posted on Sunday, July 13, 2008 - 05:28 pm: . .