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In my first Legacy I put a single Concorde 35 AH
battery (the XC, as I recall) back in the empennage with the hydraulic
pump. That size battery was, in my opinion, the minumum for cranking over
the big IO550. The Panasonic batteries may not be able to develop
the same short-term current output (cranking power) that the Concorde battery
does. Of course, many other things can lead to hard starting,
insufficient battery cable size being just one of them.
In the second Legacy that I'm building now,
I'm putting the hydraulic pump in the same place, i.e., on the aft side of the
baggage compartment bulkhead. The manual has been re-written to show it
behind the co-pilot seat, but I decided not to move it there because: (1) for
c.g. purposes it's better to move the battery -- it's heavier, (2) you save more
weight with short cables from battery to starter, (3) the hydraulic pump is not
pretty and it's noisy, so it's better back in the back, and (4) the bracket
provided for mounting the hydraulic pump behind the seat was not acceptable --
didn't fit and was too flimsy for the weight. Fortunately the hard points
for mounting the hydraulic pump are still in the bulkhead.
And by the way, you can buy a very crummy
battery box from ACS for over a hundred bucks, or a pretty nice one from West
Marine for about twenty.
Jim Cameron
Boerne, TX
Legacy #2 in progress
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