In Reply to: Starting Circuit Question for the Experienced Guys posted by Jerry on November 22, 2020 at 10:04:50:
"I have an 841 converted to 12v. It starts up usually as I release the starter button."
I suspect that you have too much resistance in the coil circuit. Many 12 volt conversions are done with a kit that comes with an external resistor for the coil. Many times this resistor is installed in addition to a direct 12 volt no resistor required coil, or the resistor in the kit is too high an ohm value.
A quick check would be to put a jumper wire across the resistor. If it starts easier you know the resistance is the problem.
Check the resistance across the + and - primary terminals of the coil. If the resistance is near 3 ohms you have a direct 12 volt coil and need to remove any extra resistors.
If the coil is 1 1/2 ohms it is a 6 volt coil and needs an added 1 1/2 ohm resistor for 12 volt system If this is your case, check the resistance of the resistor and if it is significantly greater than 1 1/2 ohms, replace it.
Your tractor on 6 volts did not have the bypass, it should not need it now. Something with your bypass is not wired correctly.
I have an 8N with side mount distributor that had same problem as yours when I got it. It had a direct 12 volt coil plus the kit resistor that measured over 5 ohms. I removed the resistor and it now starts like it should.