david mccandless wrote:

Hi Paul and All,

I plan to use the ACS Ignition Switch as shown in the Aircraft
Spruce catalogue; the standard 'Off L R Both Start, model. Has
anyone a better idea or used a different arrangement. Comments,
please, Dave McC

I just used small key type ignition switch I purchased from NAPA, and

also a

30 amp push-button starter switch (also from NAPA) located right next

to the

ignition switch.  Since this is really an automotive engine, I didn't need
the left/right both, etc.   Also, I have found that one of the items I
frequently have to replace on the Tractor-trailers I service, is the
ignition switch.  The part that fails most often is the start position in
the switch.  About 1/2 of the tractors that we service have an ignition

only

switch and a seperate starter button.  The seperate starter button seems to
last and last.  I believe that Bob Nichols of the AeroElectric Connection
also recommends against using a combination ignition/starter switch.  He
recommends a push button or toggle switch for the starter.  Much more

robust

and less prone to failure. Hope this helps.  Paul Conner, 13b powered

SQ2000

engine running.

Dave,
If I can add one point on the Bob Nuckols "toggle switch" design, which I'm
using along
with a generic ignition-key switch to turn the EC2 on/off.  The toggle
switch is an (ON)-OFF-ON
type and is wired so as to momentarily connect both batteries during
cranking.  Once the
engien starts, it separates the two batteries.  It doubles as a "crossfeed"
when in the other
position.  Makes one switch do double-duty.

Mark S.
the other position.

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