National Aeronca Association Bulletin Board

My 7EC has unshielded plugs (M41E's) in the the top of the front cylinders. They sit inside what I think are called "Ercoupe caps", and I've always had problems with these plugs. I've read here about folks using the shorter REM37BY plugs in place of REM40E's, so I bought one and found that with a new harness, I have the clearance to use them.

The Champion and Autolite application charts don't show the REM37BY as being approved for the C-90. The Autolite chart also doesn't show they're approved for the 0-200, but it does show the 0-300.

The question is, is there a problem using REM37BY's in a C-90, or have they just not been approved yet? Is anyone here using them in a C-90?

Thanks,
Jay

Jay,

Check out the tcm/link below for approved spark plugs.

http://www.tcmlink.com/pdf2/SIL03-2B.pdf

Hope this helps.

Jimmy

Thanks, that does help Jimmy! The plug is clearly shown as being approved.

I think to use them (and clear the cowl), I'll need a new ignition harness. My current harness has hard elbows that don't clear, but I tried an old slick harness with pretty flexible wires, and it fit fine.

Thanks again.

Good link Jimmy! Nice to know!

Joe

Check the Autolite plugs if space is tight - they are shorter than Champion.

mike newall wrote:Check the Autolite plugs if space is tight - they are shorter than Champion.

Good to know Mike, thanks. I'm getting ready to order the harnesses and plugs now. The plug I bought just to check the fit was a Champion, and the fit was tight, but ok. The Autolites are a little cheaper, so I was planning to go that route anyway.