A gx240 is 8 hp.
The clutch will not do the job. Pilot valve and throttle control is what you need. As the others have said about welding I agree. Dump it ans start over.
Used Gx 240 with starter missing maybe $75. Starter is $75/100 Honda parts are expensive. That's how they make there money. Sell engines fairly cheep and get you on parts.