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Submitted 187 days ago...
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Answer 1 / 2 - Submitted 186 days ago...
This sounds like you may have a leak in the diaphragm of the fuel pump.
If the fuel pump is located on the side of the block, and it is mechanical, it should be an easy diagnosis once you get it out, and depress the lever with your finger over the intake valve.
You will hear the corrupted diaphragm leak air even with the intake port covered with your finger.
This answer was edited by the_mekanic 186 days ago.
Reason: add
The fuel is still in the carb, It's not going anyplace. The carb is built so that even if the fuel line is removed and lowered it cannot siphon the fuel from the bowl.
The excessive cranking is because there is too much fuel in the intake.
I bet if you give it 1/2 throttle or more when you know it will not start easilly, It is much easier to get started. Try that.
Then, IF/WHEN it starts very much quicker than before, you know you either need a needle and seat or a float for the carb.
I would suggest you replace ALL THREE pieces from the start.
This can be done without removing the carb from trhe engines intak, IF the person doing it has experience with carb rebuilds.
Good luck.
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