Mack17
Member
Hey guys just thought I'd ask if anyone experienced their motor surging at wot.I have a 1980 Johnson 70 and when I first got the boat and ran it the first time it was surging right around 3/4-full throttle.So I found out that the fuel hose had a liner inside that was collapsing.So replaced it and still had same results.Next the check valve in primer bulb was sticking and allowed fuel to back flow to tank so replaced that as well.Next did the fuel filter and quick connects.Also cleaned out tank and pickup tube and gave it fresh fuel it's a vented tank as well.The next time I took boat out it ran perfect we ran about 15miles that day without a hickup.Anyways the boat sat for the last 3 weeks with stabil treatment added.Well took boat out today and after about two hours with no issue it started surging at full wot.3/4 throttle it ran fine I checked tank vent and it was open and had fuel in filter so was holding prime.I had my buddy pump the bulb and it seemed to help but not really.Motor also has new plugs so not really sure why it's starting again.I'm thinking I either need to clean carbs or have a vaccuum leak or a fuel pump going bad.Any of yall ever have this issue ? I appreciate any help at all.Thanks,Ron