Poll: Ignition Harness Replacement

In article ,
wrote:

(good stuff snipped)

On our Aztec's we always used the standard Unison harness with
straight (all weather) ends, secured the lowers to the intake pipes,
uppers to baffle bolts extending through the head to the "inside" with
plain nuts/lock washers. We used the Unison's 'cause when (not if,
when) an exhaust gasket blew or a stack dropped and semi-torched the
lead they were easy and cheap to replace.


This is a good reason to use blowproof exhaust gaskets -- I have never
seen one blow. I would never use the copper/asbestos type again!

Yes -- I have also replaced harnesses on my Johnson Rocket (Lycoming
O-435) a couple of times. I am currently using Slicks, but have used
Bendix. The most common problem I have had is carbon in the plug
cigarettes. Removing the cigarettes and cleaning with a Q-Tip and
lacquer thinner (both plug and lead) does the job.

I have the old "lunchbox" Bendix mags (SF-6LN-8), which have removable
fingers and a rotating drum distributor.

--
Remve "_" from email to reply to me personally.

On Fri, 27 Jan 2006 02:36:32 GMT, Orval Fairbairn
wrote:


This is a good reason to use blowproof exhaust gaskets -- I have never
seen one blow. I would never use the copper/asbestos type again!

We yanked the exhaust every 100 hours (2-4 months) to free up the
ball- and slip-joints, inspect for cracks, and r/r the exhaust
gaskets. Used either the crappy c/a's or 2 stacked "all coppers". The
exhaust studs weren't long enuff to accommodate the heavy metal
blo-prufs, the flange, a washer and a nut. Am thinking toward the end
we were using low height stainless lock-nuts on 'em (from another OEM
exhaust install) and some would still would shake loose in 100 hrs.
When we switched to stacks with thicker flanges, the stacks lasted
longer, but it made the "thickness" problem worse.

At least we didn't have to worry about seized nuts...

TC