Paul,

Someone suggested slamming the injector down on a 2 x 4 to free it up.  I think the objective here is to try to persuade the plunger to activate.  I think this would be most effective if you directed the forces in the direction of plunger travel.  Seems it would take less force and there would be less chance of damage to the injector.  If I understand how injectors function, you would want to turn it upside down and hit the inlet side against the board.

 

Or, you could order a new injector.  ;-)

 

Mark

 

 

----- Original Message -----

From: Mark R Steitle

To: Rotary motors in aircraft

Sent: Tuesday, March 01, 2005 7:53 AM

Subject: [FlyRotary] Re: testing injectors

 

Paul,

My injectors sat for quite a while and got all dried out inside.  There must have been some gasoline left in the fuel rails and injectors that dried out over time.  When I went to use them, they wouldn’t “click”.  I sprayed some carb cleaner into the inlets and let it sit and soften up the gasoline residue.  Tested them again (+12v) and they started working and seem fine now.  No, I didn’t try the 16# hammer approach.  ;-)   

 

Mark S.

 

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From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Paul
Sent: Monday, February 28, 2005 8:23 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] testing injectors

 

I recall someone posting that you could test to see if an injector is firing by just attaching 12 volts + and - to the two pins of the injectors, and you should hear a click.  Is this a very subtle click, or fairly loud and easy to hear?  I have the peak and hold type injectors if that matters at all. (72 lb/hr).  I touched the two wires to the injector's pins, and I believe I was only hearing the faint spark caused by the wires making contact.  After about 5 seconds with the two wires still touching the pins, the injector got pretty hot. Sound terminal or normal? 

      I called Dave Atkins and he said to send the injector to him, and he would check it out. If need be, he has replacement injectors. Don't know the cost (don't really care, just want one). Sounded like he was in a hurry, so I didn't keep him on the phone. Thanks for any info you guys might have to offer regarding testing the injectors, etc.  Paul Conner

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