Stihl 460 poly flywheel coil swap onto a MS440

[Nate.]

Alright question for you guys. If I understand correctly the coil on a ms460 with poly flywheel will advance with RPM? What i'm wondering is can I safely put the advancing coil onto a MS440? And will adding the advancing coil get me more timing advance at WOT or will it just make the saw easier to start?

Thanks, Nathan

 

[Nate.]

Just bought a poly flywheel coil for $10 shipped. Anyone have any information about the pros or cons of putting it on a 440?

 

[MG porting]

Alright question for you guys. If I understand correctly the coil on a ms460 with poly flywheel will advance with RPM? What i'm wondering is can I safely put the advancing coil onto a MS440? And will adding the advancing coil get me more timing advance at WOT or will it just make the saw easier to start?

Thanks, Nathan

I don't see why it wouldn't work and I don't believe that it will advance the timing any further than the standard ms440 coil I put a 044 coil in my ms460 with the poly flywheel runs great.

 

[drf256]

OK.

No coil can advance timing, it can only do a start retard. That will help with starting.

You should be able to use a 460 coil on a 440. Pretty sure the poly flywheel won’t fit. It’s a different case and crank.

You can advance the timing but still have a decent starter using the 460 coil.

 

[Nate.]

Okay I think that’s what I will do. How much do you recommend taking of the key? The saw is not ported it’s early 044 10mm with newer metal ms440 flywheel.

Thanks,Nathan.

 

[drf256]

Unported with that coil, bring the key t0 50 thousands. They are 78 stock.

You can try more, if the saw pops back off.

Keys available at McMaster Carr.

 

[Nate.]

Okay, thank you for your help. I’m going to try it.

Best regards, Nathan