Great that you got it to move, never seen a new motor locked up, maybe 1st owner tried to start it without putting oil in motor because motor does not come with oil in it from factory but will be in box.
Using the wrong size torque socket and maybe have damaged them. Pretty sure they are somewhere like a T20, T25, T27, T30, T35, Tap on socket lightly with hammer, maybe dirt packed in the top of screws, blow dirt out.
Correct, also check intake seals or gaskets, plastic intake manifolds also can crack or warp. Some 2 barrel carbs have adjusting screws under the small brass or aluminum plugs closest to the intake manifold, they can be removed and adjusted after removing and cleaning the carb. I use a ultra...
Check wires at points and condenser to make sure they are not grounding out when cover is put back on after adjusting point gap at full open position at the point plunger. 15-17 thousand should be a good gap. Make sure wires are at correct spot at plastic bushing on point assy.
Does it have a light at the handle controls? If yes maybe flywheel rotor magnets came off flywheel, If flywheel is loose engine won't run good and would damage flywheel key and would jerk pull rope from your hand. If you do look at flywheel check to see is weight is still on it. If engine runs...
Test fuel pump with vac gauge/fuel pressure gauge, remove inlet fuel line and outlet fuel line from fuel pump, should have 1-11/2 psi coming out of pump and about the same going into pump but negative reading. If good check vav hose going to fuel pump is not cracked and tight. If these are good...
Yes, test battery under load. If test low charge and retest. If still low voltage at battery replace it with correct battery. Now you still might still get a click sound but you know you have a good battery. Check for good clean grounds. If still clicks you have a broken wire harness end not...