----[Please read http://ercoupers.com/disclaimer.htm before following any
advice in this forum.]----
I know you are getting tired of buying mags, and two bad in a row is unusal.
However, if you're ready to give up on Bendix and overhauled mags, I'd call
Mattituck and see what kind of package they are offering right now on a
complete Slick package. That includes new mags, gears if needed, harness,
and new plugs. They take the old mags in trade and have an additional
rebate also I believe. Keep one set of plugs for the future. I like my
Slicks. roger
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Wednesday, August 16, 2006 1:08 PM
Subject: [COUPERS-TECH] Ignition Problem
----[Please read http://ercoupers.com/disclaimer.htm before following any
advice in this forum.]----
My mechanic has almost run out of suggestions to solve this problem so I
will appreciate any help you can provide.
Some background: I have a 1946 415C which was converted from 75 HP to 85
HP by a previous owner by making 2 changes in the carb and by changing the
full point to 4.5 quarts on the dip stick. The 337 form lists no other
work. During it's last annual (Sept 2006) all cylinders were in the mid
70's, 8 new plugs were installed, and a new wiring harnsess was installed.
About 3 months( 25 hours) ago I experienced an RPM drop on the right mag
that I could not correct. After much checking by my mechanic, I purchased
(from Aircraft Spruce) an overhauled Bendix mag. After installation and
timing the problem was completely eliminated and left and right mag drops
were about or even less than 50 RPM. I flew the Ercoupe about 20 times
for a total of 25 hours with absolutely no mag drop problems.
Then, about a week ago, at run up I had a 200 RPM drop on the right mag.
My mechanic removed, cleaned, and tested all 8 plugs. All tests indicated
they were firing correctly and after removed the plugs were dry and
appeared to have been firing. The new wiring harness also checked out
properly. So, I bought another overhauled right mag, had it installed and
the engine timed, and the 200 RPM drop continues on the right mag. Today,
after checking to make sure the left and right mags are identical, we plan
to switch the mags and see if the problem moves from the right to the left
side. If the problem moves to the left side, we believe that the the
overhauled mag I just bought is defective (just like the one with 25 hours
on it)
I would appreciate any help and advice from anyone. Thanks
Dennis Hatfield
--
Dennis
==============================================================================
To leave this forum go to: http://ercoupers.com/lists.htm
==============================================================================
To leave this forum go to: http://ercoupers.com/lists.htm
