Posted by Fargo on May 26, 2019 at 06:56:59 from (74.209.18.14):
Problem started like this: I start mowing and after 5-10 minutes under load the engine sputters, cutting in and out progressively worse and engine dies about 20 seconds later after it gets real bad. Symptoms similar to like it is not getting Fuel. Wait One minute and it starts right up. Problem repeats.
Now problem has progressed to where even after cold start motor idles fine but when I throttle up, engine starts sputtering and skipping as if no fuel. Here is a video. PS it always knocked at idle. You will see me throttling up smoothly and after a brief moment of smooth acceleration,engine starts struggling and skipping horribly and begins to die. Back down to idle and smooth again.
https://youtu.be/VlGLidUw0Ik
Here is what I have tried or done When it was running rough:
Someone suggested coils so I replaced that as old one was due for change. Replaced condenser. Cleaned spark plugs Points getting good spark New distributor cap All new plug wires New Battery Sediment bowl for gas is clean and fuel flow was inhibited so I cleaned out gas valve and now seems good with perfect flow. Cleaned fuel line. Gas cap is well vented. Ran without gas cap same problem Cleaned crankcase breather cap in case it was a problem Cleaned oil bath air cleaner. Ran with out. Same problem Opened idle jet ½ and than ½ more - no change Took apart carb twice, clean, new gaskets . replace fuel flow needle and jet. Wire fuel line screen clean
I am not a natural mechanic. What else could it be? Manifold?
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