Is This Ring Gear OK to Rotate?

[2002#3]

The ring gear of my rebuild has obvious teeth wear on opposite sides of the gear, e.g., 12:00 and 6:00  The teeth at e.g. 3:00 and 9:00 are not abused.  Abused teeth occupy <30% of the gear.  FAQers have stated (i) this type of two-site wear is not unusual and (ii) a reasonable fix is to rotate [NOT flip] the gear 90 degrees and allow the starter gear to engage areas with better teeth.  My machinist can do it.  I have no idea how this gear performed in its previous home.

 

REQUEST:  Please look at the photos below and see if you think gear rotation for this particular gear looks like a plan.

 

photo 1:  area 12:00

photo 2:  area 6:00, view 1

photo 3:  area 6:00, view 2

photo 4:  example of good teeth, e.g., 3:00 and 9:00

 

Thanks.

 

Larry

 

 

[Tommy]

It is pretty worn out. Rotation might be good idea for that one. Never done it but I think it should work.

[tech71]

215 or 228 mm ?

215 mm flywheels can be had fairly easily,  I have at least 2 extra laying around.

lightend 215mm flywheels are available for $250-299.

Rotating the ring gear is also an option I suppose  but would be my least likely choice

Edited December 8, 2022 by tech71

[stephers]

The engine usually stops in about the same 4 places every time due to the firing order and compression, that's why you see wear in only certain areas of the ring gear.  I would rotate enough to miss all the bad teeth and let the starter use up the rest of the good teeth.

 

Thanks, Rick

[2002#3]

Thanks, guys. 

My machinist and I think thats's a plan.  My ring gear and I have a few good teeth left and we're going to use them.

Larry

[Son of Marty]

1 hour ago, 2002#3 said:

I have a few good teeth left and we're going to use them.

Ah, the state motto of Arkansas?

[TobyB]

(snort)

 

t