Rotax 447 (part 3) crankshaft truing

[@KirillNeduzhiy]

Hi John, awesome video, always a pleasure to watch!

[@RotacRepair]

Thank you!

[@SkyWriter25]

That'll be the smoothest running Rotax 447 in existence!

[@RotacRepair]

Could be !

[@kyleriv]

Brilliant truing job.

[@RotacRepair]

Thank you for your kind comment

[@williamwhitley1174]

Very good. I would love to see how you actually did the truing! Could you explain the procedure?

[@RotacRepair]

That would make a good video for sure! I’ll add it to the list.

[@clearprop]

Wow quite some improvement. I'd love to know how you achieved it.

[@RotacRepair]

I’ve put the explanation and procedure on the to do list. FYI that only took 3 knocking adjustments. Guess I got lucky this time. lol

[@clearprop]

@@RotacRepair I think it had more to do with skill, sir! 👍

[@waynegilchrist3535]

So does that crankshaft have 5 bearings?

[@RotacRepair]

It does, two centre, two PTO and one Mag end.

[@jcjammer1]

Super nice work. Can I use a crankshaft out of a provision 4 in a provision 8 case.?

[@KirillNeduzhiy]

If I'm not mistaken on the 447 engine it's the same as on the 503 and you cannot use a prov. 4 crank in a prov. 8 crankcase and vice versa. The provision 8 crank is longer, different shape and woodruff key position on the MAG side (because of different ignition, Bosch points vs. CDI) and has both big PTO and MAG end bearings (6207) whereas the provision 4 crank is shorter and has a smaller 6206 bearing on the PTO side instead. You can see it best by looking into the parts list crankshaft pictures or looking them up on Google.

[@jcjammer1]

@@KirillNeduzhiy thanks for the info

[@RotacRepair]

Thank you! I believe that kirillneduzhiy8683 has correctly answered your inquiry.

[@patrickmckowen2999]

👍👍

[@RotacRepair]

🙏

[@eipperone5643]

Great, but you need to show how to tru the crankshaft.

[@RotacRepair]

The truing video is on the to do list.