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From: "George Lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-3133903@logan.com>
Subject: Re: [FlyRotary] First start
Date: Tue, 16 Sep 2008 16:39:11 +1000
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> Hi John;
>
> Congratulations on the first start.
> Excuse my lack of attentiveness, are you running a carb + electronic FI 
> /EC2 setup?
>
> For the FI setup:
> The first easy thing to check is the resistance of the injectors  - 
> probably 4 or 14 ohms depending on the type (if working).
> If these are used, high pressure rx7 FI's that have been sitting, they are 
> most likely gummed up.
> You can send them out for ultrasonic cleaning at roughly $25 per or do it 
> yourself.
>
> Sorry, no pics handy.  Lynn?
> You can do a backyard injector cleanup / flow bench with micro clamps, 3' 
> of clear hose with a fuel funnel,
> gas, injector cleaner and high pressure air source.  A little duct tape or 
> jig goes a long way for the 3rd
> and 4th hand you need.  You will also want a clear jar or graduated 
> container to inject the fuel into.
>
> A 9V battery lead connected to a spare injector connector can actually 
> drive most working injectors.
> A battery charger is much better for the most gummed up ones.
>
> 1.  clamp the clear tubing to the fixed injector (probably best to inject 
> into a sealed clear jar), (can't remember the tubing size)
> 2.  fill the tubing with gas
> 3.  clamp the other end of the tubing to an air source (say 50 psi)
> 4.  apply the air source to the tubing to push the fuel towards the 
> injector (they should not leak)
> 5.  pulse the injector connector power source to open the injector.
>
> You can run gas/injector cleaner through the injectors a few times until 
> you get a good spray pattern and they do not leak.
> Most? shops ultrasonically clean the injectors sitting in solution - I'm 
> not sure how good that is for the plastic housings.
>
> I have also heard it that you should not run the injectors dry doing this. 
> (heat, sticking open?)
>
> A fire extinguisher and friend aren't a bad idea.
>
> backflushing the injector also helps with the really stuck ones - and also 
> cleans the small screens.
>
> Cheers
> Cary

 Cary,
Sounds like a good idea for checking and cleaning injectors - got to 
remember that one.
George