OEM Stihl 064 flywheel rough casting

[BonScott46]

Brand new OEM 1203 flywheel, is this anything to be concerned about?

 

[Spladle160]

Probably runs just fine but the missing chunk next to the south pole marking and what I'm sure is just flash but looks sort of like cracks coming in from the fins sure would give me pause. If I got it new from a dealer I think I would ask them to swap it out for another. Still I'd be willing to bet it would run just fine for a good long while, just a few things I certainly wouldn't be happy to pay OEM money for.

 

[AlfA01]

Yeah...that's no good, Kyle. Mayhaps you should send it over and let me run it for you...I'll take one for the team.

 

[BonScott46]

Yeah...that's no good, Kyle. Mayhaps you should send it over and let me run it for you...I'll take one for the team.

Thanks for the offer Dan.

 

[legdelimber]

Does anyone here work in die casting? Maybe give us a hint what conditions caused that?
Trapped gases? Foreign material? Temperature? pressure?

 

[BonScott46]

IMO it looks like Japan has started putting out China quality. Even if it is ok to run it looks like *s-word and i would be embarassed to sell it as OEM quality. Would any builders be so kind as to share their opinions? @tree monkey @Mastermind @huskihl @drf256

 

[drf256]

I’d have no issue using it.

Never seen the yellow magnet coating spill over to the fins like that, but I don’t have the expertise others do here.

Anyone know Kyle M’s screen name here to tag him?

 

[BonScott46]

I’d have no issue using it.

Never seen the yellow magnet coating spill over to the fins like that, but I don’t have the expertise others do here.

Anyone know Kyle M’s screen name here to tag him?

Thanks Al, @K Mueller?

 

[drf256]

I should have some flywheels here, just no time to find the damn things.

 

[legdelimber]

I knew something else was triggering the "overthinker" in me.
I'd be curious what the air flow, especially over the magnet side, is like.
What sort of dynamic balance (vibration) will that add?
I have a Toro electric blower with the magnesium impeller
that just smoothing up the casting flash and edges did wonders for the vibration.
Yes. Air flow can make a difference.

...another example of why I wonder
On my 21" push mower, After hitting a piece (about marshmallow sized) of that friggin, red "lava rock", in my neighbors yard, I had a small ding in the blade edge.
About like a really large thumbnail clipping.
The ding was bent back and upwards.

No metal loss just the bent edge was all.

I tend to sharpen (and static balance) my mower blade almost as much some of of us do our saw chains.
I pre-walk a yard and pick up debris before cutting, etc. also.
(I just like an easy cut and not beating the engine with a dull blade.)
The mower was smooth running prior to this
But immediately it was buzzing my hands pretty good as soon as it happened.
Stopped and reground the blade, fired mower up and no more vibration.
It just struck me how much the small ding had disrupted the air flow and made the mower shake.
Thus my question on that flywheel and air flow.

 

[Mastermind]

IMO it looks like Japan has started putting out China quality. Even if it is ok to run it looks like *s-word and i would be embarassed to sell it as OEM quality. Would any builders be so kind as to share their opinions? @tree monkey @Mastermind @huskihl @drf256

Yeah.....looks like crap.

 

[huskihl]

IMO it looks like Japan has started putting out China quality. Even if it is ok to run it looks like *s-word and i would be embarassed to sell it as OEM quality. Would any builders be so kind as to share their opinions? @tree monkey @Mastermind @huskihl @drf256

Every one I’ve seen has casting cracks like that. Wouldn’t worry much about running it