Message-ID: <FDD045B6B83FD311A9880090273053E20B66AB@CDIM-PTS-MAIL>
From: "Rumburg, William" <wrumburg@cdicorp.com>
To: "'Mike S. Reinath'" <mreinath@mail.arc.nasa.gov>, 
	lancair.list@olsusa.com
Subject: RE: Throttle Cable Routing
Date: Mon, 27 Mar 2000 17:02:12 -0500
Mime-Version: 1.0

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> I have an IO360 with the sump modification that moves the fuel servo 
> unit to the front. In this position, the throttle control arm is 
> fairly close to the front cross-over exhaust pipe. What is the best 
> routing for the throttle cable? Should I route the cable below both 
> cross-over pipes with a large arc in the cable to the arm, or is it 
> okay to route the cable between the oil pan and the pipes? The 
> preferred routing seems to me to be the more direct routing between 
> the pipes and the oil pan, but is the close proximity to the oil pan 
> and the exhaust pipes okay if I install heat shields where it crosses 
> the pipes? Thanks.
> 
	Mike -
	   Wow, did I ever have a problem with this on my fuel injected
engine (which should be the same setup as yours), but with some work, you
can make it come out nicely!....
	First, the only good route for both the throttle and mixture cables
is just under the rear exhaust pipes, then under the oil pan. Both must be
clamped to their own "L" bracket welded to the oil pan (they will both pass
just one inch under the exhaust pipes on each side, but that's no problem). 
	Proceed as follows:
	    With the cables temporarily in place, use a felt tip pen to mark
where the "L" brackets should be placed for the clamps which will secure the
throttle and mixture cables. This is the ONLY good way to clamp them and the
importance of clamping of these cables, especially the throttle cannot be
overemphasized. More than one pilot has gotten into SERIOUS trouble when a
throttle cable clamp was poorly secured and failed. Yes, you will have to
remove the oil pan and return it to Don George so that he can weld two short
lengths (approximately 2" each) of heavy aluminum "L" to the bottom of the
pan where you have marked. He probably won't charge you anything and will
also include a new gasket and sealer. Don't get discouraged, it only takes
about 30 minutes to remove the oil pan and one hour to reinstall it!
	Second, unless they've changed the "Style IV" exhaust pipe routing
in the vicinity of the mixture control, it blocks the mixture calbe from
it's necessary route. The mixture control arm has "ICO" stamped on it to
designate the Idle Cut Off position. I had to remove the exhaust pipes for
the #1 and 2 cylinders and send them to Dawley Aviation in Wisconsin to have
the #1 pipe cut, bent and rewelded as necessary to clear the mixture cable.
I had to return it not once, but three times and I'm surprised that they
were able to get it just right at that. They did an excellent job. Cost was
$ 200. I called Lancair about this afterwards and I believe they knew of
that problem, but hadn't corrected it as of 1996.
	Good Luck and write with any further questions about the details.
	Bill Rumburg
	N403WR  (Sonic bOOm)


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