Got fuel, spark, comp but no start

What you claim cannot happen. If you really do have

compression

spark (at the right time)

fuel (GOOD fuel)

It will RUN.

Numba Won (1)---pull the plugs and inspect them for fuel / oil fouling.

Teu (2) Stop screwing and guessing with timing. Set it ONCE and KNOW it will run and forget about it.

I agree. If it has run great before and not now....I'd say mayyybe you've got electrical~ignition (power IN) problems. Try some starting fluid too. That can help weed out bad fuel or flooded plug issues sometimes. Wet plugs can drive you outta your mind sometimes.