husky372
In a perfect world you would have considered your limited exposure to these caps before making a blanket statement that people who have had problems with these caps are idiots, after all, how many times have you used these caps and on how many models of Stihl saws?
The 440 and 460 have the one up, one down configuration and index markers as visual aides and confirmation that you have closed them properly. The ms260 does not have an index for both caps although both caps are more or less upright when closed.
The initial discussion and dislike for these caps was specific to the 250 and 260, smaller saws that would be used in a tree more often.
The problem is that the oil cap seems to suffer some sort of hydraulic lock even when seemingly properly inserted, although not deeply enough, and it will actually hold the cap in place until you are in a tree with the powerhead tilted caps down. Then it lets loose and soaks you, although this doesn`t happen only in trees.
Also, as Grateful has pointed out, they allow an awful lot of crap to fall down into the tanks. I always wipe a finger around the caps before opening, but there always seems to be one goober that I missed and I find it hanging precipitously in the tank opening with the cap removed.
These caps are just another lame solution to a problem that didn`t exist brought to us by the fine engineers at Stihl, just like the fixed jet carb that you would only expect to find on consumer junk. To borrow a term from Fish, these caps are for the "pussies" that don`t have enough grip strength to open a regular cap without a scrench.
Russ