Fly150 won't start. bought gas then day later won't start.

I am not familiar with hybrids, but i think when you start, it's starting with the battery, so I think you have a bad connection, check and clean the battery terminals.

timeing chain

Check the condition of the following:

1) Spark plugs, leads and coils
2) Fuel filter
3) Air filter.

Then report if no findings please.

Possibly the fuel pump or crankshaft sensor

with your specs about the plugs / check leads and distributor cap or distributor unit

Problem with the fuel delivery system. Sounds like its flooding its self

THE SHAVINGS ARE FROM THE FUEL PUMP ROTOR, REPLACE THE FUEL PUMP INSIDE THE GAS TANK.

You may have loaded a fuel line or connector up with contaminants. What else is happening during the second or 3rd day of running? Is it running low on fuel? Try to make a list of your gauge set! It only makes sense.

sounds like the distributor needs replaced

you need to check fuel pump pressure at the fuel rail the next time it shuts off ,
have a great day.