Re: intermitent miss (sputter) no load ONLY!

Posted by rasputen on January 09, 2005 at 01:22:41 from (68.53.121.67):

In Reply to: Re: intermitent miss (sputter) no load ONLY! posted by Willy-N on January 08, 2005 at 23:43:28:

Mark,

I have rebuilt the carb several times. All bushings & seals are new & no air leaks. Tried WD40. Retorqued the manifold & got excited when I found a stripped brass nut. Replaced & torqued all but no change.
This sputter has been going on for 15 years w/ various upgrades not changing it a bit. Replaced the manifold a few back & fixed the inherent #4 exhaust deteriotion on block,no change.

ALL jets changed, inspected, cleaned, looked at with microscope ect....cleaned ALL passages with carb cleaner/air/guitar strings...even tried diferent sized idle jets to get richer mix as it is always a bit lean (TSX 33), changed my idle/air setup to get it right w/new jets but never any change to the idle sputter.Tried various economizer jet sizes & even plug/screw in economizer port where jet goes. All these changed the way the carb acted & setup to get it adjusted but never changed the sputter.
Had no main jet at bottom of main needle,just empty hole w/no threads(???) (jet is under nozzle). Tapped the hole & installed correct main jet, this provides better main jet adjustment, but NO CHANGE in ANY operating range!!!! This carb is unbeleavably forgiving.

Tractor runs like a top!! Awsome power, just the anoying sputter intermittently at _NO LOAD_ idle or fast idle.

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