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I hate to admit it but I have ALOT of experience with this subject - can you say 2-stroke motorcycle in the early '70s. Here is what worked for me (in no particular order):
1. wash the plugs with spray brake cleaner (only worked for mildly fouled plugs)
2. wash the plugs with Easy Off oven cleaner ('borrowed' from my Mom's kitchen - I particularly liked this one)
3. heat the plugs with a propane torch to burn the deposits off; this had mixed results because I tended to overheat the plugs and destroyed them-worked good if done correctly)
4. bead blasting - quick and easy but scored the plug so they re-fouled' easily)
Bet Bill Jepson knows some real neat tricks because of his years in the motorcycle industry?
Ken Powell
Bryant, Arkansas
501-847-4721
RV-4
-------------- Original message --------------
>
> ----- Original Message -----
> From: "Rogers, Bob J."
> To: "Rotary motors in aircraft"
> Sent: Monday, June 13, 2005 9:53 AM
> Subject: [FlyRotary] Engine Not Starting
> >> Homepage: http://www.flyrotary.com/
> >> Archive: http://lancaironline.net/lists/flyrotary/List.html
>
>
> I believed in the past that this easy plug fouling was specific to my single
> rotor.
> While tuning the carb, I am using quite a bit of rich mixture condition.
> Most of the time after a couple of restarts the game is over, and it doesn't
> start again. Also shutting the engine off for the day after running in rich
> condition results in not being able to restart it the next morning.
> Taking the plugs out and cleaning them with wire brush and air is not doing
> any good. The only way I found is beat blast the plug all the way down to
> the base of the insulator. This works every time.
> It is obviously carbon build up on the insulator. Why is it doing it every
> time? is it specific for the rotary? what is done in the RX7 done to prevent
> that from happening?
>
> Richard Sohn
> N-2071U
> Work on single rotor.
>
>
> >> Homepage: http://www.flyrotary.com/
> >> Archive: http://lancaironline.net/lists/flyrotary/List.html
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