On Nov 11, 2013, at 11:50, Neal George <ngeorge@continentalmotors.aero> wrote:

Gentlemen - Continental's recommendation is most certainly to NOT use Hoppe's No. 9 on the injectors.  The maintenance manuals call out lacquer thinner, MEK or acetone as preferred solvents.

Neal George
Sales & Services Representative
Continental Motors, Inc.
2039 South Broad Street
Mobile, Alabama  36615
ngeorge@continentalmotors.aero
1.800.326.0089 Customer Service
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-----Original Message-----
On Behalf Of Kevin Stallard

Hmmm,

So much for mechanics recommendation.  I'll check it out, thanks for the heads up Mark.

Kevin

________________________________________
From: Lancair Mailing List [lml@lancaironline.net] On Behalf Of Mark Sletten [mwsletten@gmail.com]
Sent: Friday, November 08, 2013 1:23 PM
To: lml@lancaironline.net
Subject: [LML] Re: Injector cleaning

Kevin,

I may be wrong (someone will correct me if I am), but I seem to remember the Continental rep suggesting Hoppes #9 is a not a good idea for use on the injectors. Hoppes #9 is a copper solvent, and IIRC the Continental rep said the injectors are made partially from brass, which is a copper-zinc alloy.

--Mark


On Fri, Nov 8, 2013 at 10:56 AM, Kevin Stallard <kevin@arilabs.net<mailto:kevin@arilabs.net>> wrote:
I use gun cleaner.  Hoppes 9 I think is what it is (I'll verify when I get home).

Open the bottle, drop in the injectors, slosh them around gently, and let it sit for 45 minutes or so.

They come out sparkly clean :)

Kevin
________________________________________
From:   Paul Miller [pjdmiller@gmail.com<mailto:pjdmiller@gmail.com>]

This is what I'm using to clean the injectors in the IO550.  So far, it is inexpensive and effective.  The $32 harborfreight ultrasonic cleaner is just fine for me.   It does have a short cycle which is OK for frequent inspections.  The finished product is clean outside and spotless inside.   The last photo shows the troublesome deposits on my injectors.  The shot is looking into the injector from the engine side of the nozzle so that's the area where the jet expands and exits into the intake manifold.  This #2 is still showing some black after an hour of repeated cycles in the bath.   These injectors were obviously quite dirty and overdue for cleaning.



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