The issue could be that the clutch has moved back and it will not engage properly…. Have you tired to start it through a cool down process…
1. Trim all the way up
2. Throttle all the way up (full throttle) leave it there for a few seconds till Rpm reaches about 2700-3000 or possibly more …
3. Then bring throttle down and let ignition occur and normal startup
if you can get it started that way.. then I can suggest some remedies…
David