S88 Zentih carb main jet

old · Sep 16, 2018

So yesterday while I was messing with the fuel system and problems I noticed the man jet adjustment needle was dripping gas. It has a Zenith carb and the main jet needle is sloppy. I pulled the main jet adjustment part out and found a bad O-ring that appears to be non-replaceable. So where can one find that parts.
Thanks

scott mcintosh · Sep 16, 2018

Rich can cut off a small chunk of chainsaw fuel line and use that for packing.Scott

ollie gm · Sep 17, 2018

Nothing makes your engine run better than a new or rebuilt carb. One of the main reasons for a poor fuel mix is having a worn main jet needle not staying concentric to the bore of the jet. Sometimes when turning the needle in it will flop sideways and give you a rich mixture while you're thinking you went too lean. Tuning the needle can then start to get real confusing for some folks.

These main jet are easily available from several online sources. $25 - $40 price range.
new design of Zenith adjustable main jet

S88 Zentih carb main jet

old

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scott mcintosh

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ollie gm

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