Can anyone explain throttle plate deposits?
Hey guys— can anyone explain to me just how throttle plate deposits interfere with carb functioning, in mechanical detail?
I'm about to rebuild my Carter YF, which has recently started to give me a stall while running, or a hard start from cold every now & then, which a few shots of Gumout down the throat and about 5 minutes to soak in always instantly fixes. It's for this reason that I've narrowed the problem down to a gummed-up throttle.
Is carb gum heat-sensitive, meaning that once the fuel really gets flowing and the carb gets hot, the gum is less 'gummy' than when it's cold and been sitting? The stalls I've had are always soon after a hard start. When the engine achieves highway temps, or city stop-&-go driving beyond the first 45 min or so, it will never stall— only on its way to being truly fully warmed-up.
I'm rebuilding the carb for this reason, and also because it's been running rich for a long while now, just DUMPING fuel into the intake to the point where when I first rev up, there's always a black spot on the ground from my tailpipe. But does anyone have any alternate explanation for the intermittent stalling/hard start symptoms I'm describing, & why carb cleaner down the carb will fix it every time? I just want to make sure I'm on the right track— sounds to me to be a gummed up, dirty carb with gunk down near the throttle plate and varnish probably in some critical places in the main circuit.
I'd appreciate any good descriptions of throttle plate deposit functioning, though- I'm not fully clear on the concept of how deposits interfere with the mechanical functioning of the thing.
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