Throttle Control and the Idle Adjustment Body
By
gwess, in Engines
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By tpuppo3
Hello all. I spent about 30 minutes sorting through thousands of topics related to "high idle" but none of which answered my question, so apologies to all if this is a repeat.
I recently bought a C161 (8 speed manual) with a Briggs & Stratton 18hp twin. According to Briggs' manual they recommend idle to be set at 1400rpm. I'm not claiming to be smarter than the engineers who designed it, but this seems incredibly high and wasteful on gas. Realistically, a tractor engine isn't spending a lot of time idling (not like a car stuck in traffic or at a light) but it's more of an annoyance than anything.
My question is, does anyone know 1.) why it's idle is so high, and 2.) has anyone tinkered with it to get it lower-without compromising other performance aspects of the engine? All my personal preferences in relation to idle speed aside, the engine runs like a top (knock on wood).
Thanks to all for your help.
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By Team70R
Well I scored a gently used Briggs 900 series to repower my new 606! Doesn't have an air cleaner cover for it so I zip tied the filter on after I cleaned all the junk out of the carb and it ran good. Now it will rev slow and die after it idles a second. I'm guessing there's some more gunk in the carb that I either missed or broke free??
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