pinestump2
New Member
I,m having an ongoing problem with my 140hp 86' Seville. We took it out this past weekend and it ran great. We cruised for about 10 min. at slow speed, maybe 5mph, then opened it up for about another 5 min. It planed out great and ran smooth. Then we slowed back down to a slow cruise for 20-25 min and it still ran smooth. Then I tried to open it up again and it just sputtered and backfired and bogged down like there was no power.The engine temp was at about 165. It never did stall but you couldn,t open it up. This has happened over and over even after taking it to our mechanic. So far, we,ve had a carb kit;replaced the fuel pump filter and a tune-up kit put in. We also had an electronic ignition conversion kit put in. That really screwed things up,so we had the origional ignition re-installed. If we run it at slow speed, it runs fine. Any ideas on what's causing this, or how to fix it?