Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
What was original problem? What is the compression? What is the valve clearance? You say timing is right? The inner camshaft and crankshaft timing, and the timing key in flywheel??
Will it fire on ether?
The outer timing is set by the keyway between the flywheel and the crankshaft. If the key has any damage at all, it throws off the timing and you get a no start. Flywheel needs to be removed , with a small puller, then you can see the keyway. See Flywheel link below.
If it has spark, compression above 70 psi and is in time, it should start!
Flywheel key can have no damage, it needs to be perfect and the flywheel needs to be torqued down when reassembling.
The only thing that makes the spark is the coil and the magnet in the flywheel. Try removing the kill wire from the coil and see if spark improves. Kill wire may be grounding spark.
90 psi is good. So is the spark strong? If you put a teaspoon of fuel direct into the spark plug hole, re-install spark plug, will it fire for a few seconds? If not, seems to be that the crankshaft and camshaft timing may be off!
Governor ear will not affect starting. If the camshaft is not for same series of engine, it will not work
You would have to compare it to the old one.
It will not run with that low compression. Compression can only leak at head gasket, valves or the piston rings!