Sprag Troubleshooting
in General Tech Discussion
3 weeks ago
Excuse my ignorance, but I'm new to the Rotax world. I understand the procedure for checking for a damaged sprag on a 912s by using a clamp meter on the starter power feed. However, we did a little brainstorming and removed 4 sparkplugs to remove engine compression resistance against itself.
We found that the sprag engaged and turned the crankshaft and propeller without any hesitation through multiple revolutions without disengaging.
If the sprag were actually failing, wouldn't the engine still exhibit the same classic sprag disegaging and reengaging behavior when turning the engine over with the starter?
Thank you for any feedback.
