Posted by MarkB_MI on August 30, 2018 at 17:39:59 from (174.230.25.69):
In Reply to: wont run right posted by 1948jr on August 30, 2018 at 15:08:54:
Most carburetors go lean when the throttle is advanced, because there's a lag between when the throttle is opened and when increased airflow through the venturi starts sucking more fuel. Most automotive carbs have an accelerator pump to compensate. Some had "power valves" as well. Motorcycles and some sports cars use "constant velocity" carburetors, where the airflow through the carb is restricted to prevent the mixture from going lean.
Tractor engines aren't expected to respond instantly when the throttle is opened, so they don't typically have accelerator pumps or power valves, nor do they need CV carburetors.
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Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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