Dan Luke wrote:
: However, the plugs were subject to lead fouling. Lycoming recommends a
: hotter plug to cure this problem (it did) but the fine wires were not
: available in that heat range. I had to go back to massive electrode
: plugs.

I thought about fine-wires, but I've heard that they have fouling problems,
and tend to need a hotter version to minimize that. Since I do run autogas
(high-compression, 91 AKI minimum and I run 93), I would be concerned about
preignition with a small, hot, pointy thing like a fine-wire. I haven't had any
issues yet, but I know that the autogas in the engine is pushing things a bit. Also,
since I do my own maintenance (and there are only 8 plugs), having to diddle with the
massive electrodes every year or 100 hours isn't that big of a deal to me. The hourly
cost of the fine-wires are about the same IIRC (3x as long for 3x the price?).

I'm leaning towards PMA'd equiv like Autolites. I've been happy with PMA'd
oil filters, air filters, vacuum filters, etc so far. Something about paying for a
name bugs me.

-Cory



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************************************************** ***********************
* Cory Papenfuss *
* Electrical Engineering candidate Ph.D. graduate student *
* Virginia Polytechnic Institute and State University *
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