Service tools, I always buy them when I'm done with those saws lol
346 and 550 tools:
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My dealer trained me up how to use their AT program, and I could come there anytime and plugin my saws and do my work there, all for free, to bad it's 3 hour drive for me but it's worth it, all my money will go to them!
First one is from one who has airleak (lean scoring), or....
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Second one is blown crank rod bearing....46 hour!! carb has gone in lock position, we will fill it up with fuel next time and see.
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