318 will not start

So much it could be, and very little to go on....

• Verify you have valve timing... nylon cam gear are always suspect
• Verify you have spark at the Spark Plug
• Verify gas is coming out of the carb into the intake (accelerator pump)

Even if you have a major vacuum leak, such as the PVC hose isn't plugged in, it will still start and run but not want to idle.