Ok, working on a new to me boat, Wellcraft 210 with 5.7 Merc, 260, Alpha 1. Put the muffs on, ran the motor for 15-20 min on the hose, checking for impellor flow. Good water coming from the ports at the gimble mount area. Good oil pressure, temp. hovering at 200-210, rpm from idle to 3500. Motor...