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TO 20 will not start

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Author  [Modern View]

02-20-2021 07:23:51

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TO 20 / first off turned off running cond. / Had governor issues / changed governor & cam shaft / it will fire but not run /will only fire with choke fully closed /fuel will drip from carb. / check plugs bone dry/ set timing mark on fly wheel set distributor to just as points open / have also tried advancing & retarding the timing a few degrees / will not fire at all doing this / also switched wires 100 & 80 degrees will back fire/ Any advice what to do next im lost at this point /THANKS

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02-20-2021 12:26:44

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 Re: TO 20 will not start in reply to hayhay5757, 02-20-2021 07:23:51  
Quoting Removed, click Modern View to see Thanks Steve check my second post

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02-20-2021 11:44:55

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 Re: TO 20 will not start in reply to hayhay5757, 02-20-2021 07:23:51  
I would start with checking vacuum at the carb. Disable the spark so it cant backfire, hold your hand tightly over the carb, crank the engine through.

You should get strong steady vacuum and your hand wet with gas.

If no vacuum, there is a valve or valve timing problem.

If vacuum and no gas, there is a fuel delivery issue.

Has this been sitting a long time? If so try a squirt of oil in each cylinder to raise the compression.

Find #1 on compression, set the spark timing and firing order by the book, don't guess. Check the spark at the plug end of each wire, not just at the distributor or coil.

If you had poor or no vacuum, check the compression. Double check the valve lash, not by a formula for turning the engine to certain places, check it turning the engine all the way through twice on each valve, find the loosest spot. That way you KNOW, no doubt it is right.

If you do go back in to set the valves, check the valve timing. With #1 at TDC compression, #4 will be in overlap. Rock the engine back and forth while watching #4 rockers, they should be exactly in overlap at TDC.

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