MF, I like Echo, but the new ones seem to clog spark arresters more commonly than other makes. MSAA used to sell them under the name Craftsman - don't know how old mine is but has a float carby and points
Back to chainsaws, a good way to prolong the life of the tool-less tensioner is to lightly hold the end of the bar up at any time you have the tensioner loose (open/unlocked) - that way the little bits of the tensioner don't cop full weight of the bar and eventually break it.
Doesn't hurt to do it on the regular ones either - especially the cheaper ozitos, poulan, new homelite
I would be more worried about the cheap bits of the 'spring assist' starters - I helped a guy with one of the bunnings 4 stroke Yardking trimmers - broken starter after 4 uses. He said he always 'latched' it in before pulling the cord hard. Fortunately the starter from a Full Crank Ryobi fitted straight on
