Ignition flywheel rotation lock

[FaNaTic]

I have to remove the flywheel rotor to adjust the ignition timing of my 188 Alpina.

What is the best way to lock the flywheel rotation?

I don’t have a flywheel holder (strap tool).

Is it appropriate to use the holes in the rotor to put a bracket (to the frame for example) for blocking?

Thank's for your help.

[feetupfun]

Yes as long as nothing protrudes inside as it could damage the stator.

It's a normal thing to undo the nut with an impact driver/rattle gun.

As for tools to ergonomically hold it still while you tighten the nut, an adjustable two-pin wrench works on just about every magneto flywheel I've had to work on. I find it better than a strap tool.

Something like this:

https://www.maxiloc.com.au/product/amf-adjustable-pin-wrench-758/

 

[FaNaTic]

Finally, it was easy to unscrew the central nut. I did a bracket between flywheel and frame.

But now, I can't extract the flywheel despite using a good flywheel puller M33x1.5.

Any trick to help? Do you use an impact driver/rattle gun for this too?

Would a bearing ball at the contact surface make it easier?

[carl ekblom]

You need a flywheel puller to extract the flywheel

You may need an impact gun, for the central bolt, at the extractor.

Be careful not to destroy the threads, I think the risk is low, when disassembly. You may need something between the crankshaft threads and central bult

[FaNaTic]

I got it by heating the flywheel center with an electric heater gun.

Thank you all.