I own an 88 Mariner 20HP outboard, starts fine, great idle, good power in reverse, shift to forward and it acts like its running on one cylinder.<br />Shift to neutral, runs great full throttle, shift to foward and its power drops off again.<br />From half throttle to full, no change in power.<br />New electric pack less than 20 hours running time, replaced plugs, checked wiring, filter, lines, linkage, what next?
