Is the choke closing completely? Some choke plates have a spring loaded vent door, be sure that is in place and working, if equipped. The carb may have some partially blocked passages, common with ethanol gas and infrequent use.
How is the compression? low compression will cause hard starting, possibly run the valve setting just to be sure they are right.
Is this still 6 volt? If so, everything has to be right for it to start. It needs a healthy battery, size 0 or 00 battery cables (not auto supply cables), a fresh starter with good bushings, good grounds.
Assuming this is battery ignition, check the voltage at the coil with the points closed. It should be near battery voltage. If low, could be a failing ignition switch, a high resistance connection (loose, corroded). The coil you replaced, are you sure it is the correct coil? Is there a part number on the coil itself? Often they are reboxed and get sold under the wrong part number. A good spark will jump 1/4 inch at the plug end of each wire to ground while cranking.
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Today's Featured Article - What Price Enthusiasm? - by Anthony West. Quite frankly, for some time now restorers like myself have become more and more concerned about the rapid increase in the prices of old farm machines here in England. There is now a growing market for "As found" machines. Which as machines get rarer, has found the birth of a new industry....one of the "procurement agent". These agents appropriate as much old machinery as possible then inflate prices at auctions. So at what price enthiusiasm? We are now seeing poor machines which 3 years ago ma
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