Posted by Geo-TH,In on November 30, 2021 at 11:02:13 from (50.102.17.123):
In Reply to: Ford 640 loader tractor posted by grandpa Love on November 30, 2021 at 10:06:03:
GP Backfire through carb means intake valves aren't closing, not sealing, rusty valve guide or rusty valve. .
Leaky intake valve will blow air backwards through carb creating a very rich fuel mix and run like crap. Check timing, Checks condition of points too.
Bad valves will not seal properly, allowing moisture to get to the spark plug and hard to start with a wet plug. Look at the plug tomorrow morning. See if the plug is wet before starting.
Do a compression test while you are at it.
As long as you are having fun, keep doing what you are doing.
I think you are learning that not all tractors found in the weeds are worthy of saving.
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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