That is a common value, either of these two will work at about $8 each

http://www1.mscdirect.com/CGI/NNSRIT...MT4NO=72152023

http://www1.mscdirect.com/CGI/NNSRIT...MT4NO=72152023


"dave" wrote in message
...
my ancient 4hp sears craftsman air compressor needs a starting capacitor,
I've determined (through a process of elimination). I still have the
original owners manual, and the capacitor is "part of the motor", not
shown in the parts blowup, or parts list, as a seperate orderable part.
further, the friggin' thing seems to be a 'non-standard' mfd rating, too
(it doesn't 'fall into' any capacitor size-groups of any maker's starting
cap's I can find online. matter of fact, it's not even close):

the one in it now is
110 volt, 485-580 mfd
mallory #139852-49
seems a slightly non-standard SIZE as well:
diameter: 1 13/16ths inch, and
length, overall, excluding 'spades': hair over 4 5/16ths (but clearly
under 4 3/8ths)

atttempts to locate same by the mallory part number on it entirely
unsuccessful. so (physical size and 'look' issues aside) can I "daisy
chain" two cap's and achieve the same net effect, somehow? appearance "not
an issue", I just need a working compressor. I know I can replace the cap
with a higher voltage cap, and that'd be fine (maybe even desireble) but
what about the mfd rating? if I must, is it best to go 'bigger mfd
numbers' or lesser?

thanks for tips on this, guys :-)