My '85 90 hp I6 runns ok for about 5 or 10 min, then develops a nasty miss.<br />The Data: 16' Larson runabout (~2000#), 19P aluminum prop, 50:1 gas, WOT RPM cold - 4100 ( a little low), speed cold - 29mph(gps). After 5-10 min, WOT PRM -2000, speed -10mph (gps). Checked fuel lines, checked...
