340 has no balls

Diagnos and tune...dont throw new parts at it in hopes you shotgun hit the problem. Which you may never do. All good advice here. Check timing, get a vac gauge on it and check the readings. Couple other things maybe...

- Pull your plugs and read them! FBO has a good reference page. Lots can be told...
- Check the gap/heat range etc...a good replacement is Champion RN12YC for a more or less stock 340.
- Is your oil wick beneath your rotor been lubed lately? Good to check while your at it...give it a squirt with white lithium grease.

Let us know what you find out!