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Vangaurd 18 hp

858 Views 7 Replies 8 Participants Last post by  D. McQuaid
I bought a 646 with a vanguard 18 hp. It suddenly started surging. Has anyone had this problem. I see the governor linkage moving back and forth. I wondering if I have a bad coil or does someone know what to check oin the governor?
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This used to happen to me. Debris in the carb sucked into the jet or idle circuit. Some debris coming from the fuel line fixed by a -proper- filter; made for fuel pump delivery. Some debris was from a cheap knockoff fuel solenoid that was deteriorating into the fuel bowl. Buy genuine parts! There is a small hole in the intake body , near the butterfly and a shot of carb cleaner into that via the red tube of the cleaner can would clear it temporarily . Real fix is clean the bowl & jet and prevent debris.
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