Since my last posting which had no replies? I changed the suspect fuel line, which did'nt help at all. Took the boat down to the water and it starts right up, idles fine, boggs down in gear, will not go over 2000rpm. Went home and pulled the plugs 1 at a time at idle and you could see a drop in rpm along with smokey exhaust for each plug removed. Pulled all plugs and ran WOT compression test 5 cyl. at 145 PSI and 1 at 135. Does'nt sound bad to me for a 1984.Anyone with a constuctive suggestion would be greatly apprecciated. Should I rebuild the carbs at this point? 