CharlieWaffles
Well Known Member
As many of us know, if you get a YIO-540 engine from Vans it is likely to come with a dual-groove flywheel. This wheel has been known to cause alignment issues with some alternators. It also lacks the boss mounts on the inside to allow things like LightSpeed Plasma sensor rings to be mounted.
You have two options you should be aware of:
1) If you know ahead of time, ask Vans to order the engine with a single groove flywheel. If they resist, let them know they have done it many times in the past. Escalate the issue if they continue to resist
2) If you already have your engine, Lycoming will swap out the flywheel **IF** you have not started the engine. Call the Thunderbolt division and they will send you an affidavit to sign that says you have not used the flywheel and they will swap it out for you no charge.
You have two options you should be aware of:
1) If you know ahead of time, ask Vans to order the engine with a single groove flywheel. If they resist, let them know they have done it many times in the past. Escalate the issue if they continue to resist
2) If you already have your engine, Lycoming will swap out the flywheel **IF** you have not started the engine. Call the Thunderbolt division and they will send you an affidavit to sign that says you have not used the flywheel and they will swap it out for you no charge.