Start at http://www.alberg30.org/collaborate/Atomic4Engine and either find, or start, an appropriate page for the information. The pages in that section are editable by everyone and have the potential to become a huge repository of information.
Links
Captain Ron's
Atomic
4 page has moved and gotten better.
Another place to check
for Atomic 4 parts online, is here. (Caveat emptor; I don't know these people.)
Indigo Electronics is still a good
source for certain Atomic 4 upgrades, including electronic ignition, oil
filter, crankcase ventilation, fresh-water cooling and electric fuel pump.
Standard Motor Products Incorporated, Blue Streak
UC-15 with internal resistance (FOR MOST A-4 ENGINES).
$32.78 at Discount Auto Parts.
Standard Motor Products Incorporated, Blue Streak
UC-12 for use with with external resistor (not usually for A-4's*).
They also make a UC-12T and a UC-15T which are less expensive but quality
control is probably less. I have been told that the SMP UC-15 is comparable
to a BorgWarner: E40BAP or a NAPA: IC64SB
*I understand that the reason there is a is a coil made for use with an
external resistor is so it can be wired into an starting/ignition system that
by-passes the resistor only during starting, thus producing a hotter spark
for easier starting.
Since the Atomic Four engine was installed in about 40,000 boats, there may
be a few around that are wired up this way, and they may still need the
external resistance coil. The external resistor that I saw was a white
ceramic block about 3/4" x 4" that is mounted on the engine room bulkhead.
An in-depth reference to almost every essential system
found on a sailboat. Calder has well-considered strategies for everything.
Granted, there are good alternatives to some of his approaches, but he
won't lead you astray. This is a book you can trust. Now expanded in
its second edition.
