Online Community of Zenith Builders and Flyers
Found two cracks in my aluminum flywheel.
The new parts require the reduction gearbox to move forward 1/4 inch. This causes the radiator to move forward, and interfere with the cowl.
I decided to try modifying the drive coupling by machining 1/8 inch off each side, thereby recovering the 1/4 inch.
I plan to do a few high power ground runs before flying, and will update this post with the results.