Chainsaw Repair

I think I know why that Tsumura bar had so much bar rail and tip wear now. Compared to other of those bars I have had and took on trade.  The bar oil tank looks like all it ever had in it was a thinner hydraulic oil. Red and don’t smell like trans fluid. Not red bar oil or even close to bar oil.

Also when filling up noticed a fuel leak on side. That newer style tank vent was popped out.

Also when done after dressing bar some for testing. I found this white round plastic ball on bench when took saw off.  Learned there was like 3 different tank vents used.  Early then this one then later used now. This one and later now same but different insides. Middle one like this one used the ball, disc, puck front.  Later uses the brass now.