YM165 Low oil pressure

   / YM165 Low oil pressure #21  
Bearings are Aavil from Fredricks, (121450-02100 Fr.-Main MB-145 2nd. Main MB-245 3Rd. Main MB-215)
Rear Main 140/147 MB-445 Rod bearing 140/147 RB-31

Replaces .25 under
front (121450-02310) MB-145C
2nd. (121450-02380) MB-245C
3rd. (121450-02370) MB-345C
Rear Main (121450-02110) MB-445C
Rod Bearing (105311-23380) RB-31C
 
   / YM165 Low oil pressure #22  
The crank looks good but the bearing surfaces might be out of round. Do you have a micrometer to measure them? If not then any machine shop could measure them to see if they are oval shaped. It would take less than 5 minutes. I say this being a retired machine shop owner. They probably are OK but it would be nice to know. Aside from that I think your plan is good.
Eric
 
   / YM165 Low oil pressure
  • Thread Starter
#23  
I do have a micrometer and will check that this evening.
 
   / YM165 Low oil pressure
  • Thread Starter
#24  
Best this new micrometer user could come up with is 0.0002" and the normal dimension is 0.0004" on the main bearings..
 

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