I have also noted weak, and sometimes
missing spark when cranking with the starter. I thought I might be seeing
coil degradation until I checked with test mode on the EC2 (mode 8?) and found
sparks jumped well over an inch on all coils.
OTOH; I have never had any difficulty
starting the engine.
Al
-----Original Message-----
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Tracy Crook
Sent: Monday, December 03, 2007
7:02 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Hard
starting - the saga continues
It is odd about being both rear plugs. Only
thing that comes to mind is that missing rear sparks can be caused by
low cranking speed (below the EC2 minimum of about 120 rpm). Probably not
the case since you mentioned that it really cranked over smartly with the plugs
out.
On Dec 3, 2007 5:52 PM, Steve Brooks <cozy4pilot@gmail.com> wrote:
I
did see intermittent spark on the D581 coils as they were going bad so
that's a real possibility with your symptoms. But could be fouled plugs
too. Which coils are you using? I still have 3 of this type on my
engine but they have a cooling plenum over them. The WILL fail
without cooling as I verified 3 times. Never seen a D580 go bad but
never say never.