spark plugs ??

Pre-War Aeroncas
Rodney Zapf
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spark plugs ??

Post by Rodney Zapf » Sat Apr 06, 2013 14:25

I am in need of spark plugs for my Lyc. 65 hp 0-145 engine (unshielded). Book says AH-4 plugs but I can not locate nor do I know what the replacement plug would be.

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Nathan K. Hammond
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Re: spark plugs ??

Post by Nathan K. Hammond » Sat Apr 06, 2013 17:16

99% sure you're looking for M41E plugs. I'd have to pull the TCDS to be certain. I know we ran them in a buddy's Lyc powered J-3.

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Rodney Zapf
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Re: spark plugs ??

Post by Rodney Zapf » Sat Apr 06, 2013 21:17

Thanks for the reply--would these plugs have a single ground strap or double? Also wondering if these are the replacement plug for the unshielded version of the 0-145 Lyc ignition system. I just can't see opening my current plugs to .025 as is called for in the engine manual. I really appreciate the interest you have shown by responding. Thank you, Rod

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Nathan K. Hammond
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Re: spark plugs ??

Post by Nathan K. Hammond » Sun Apr 07, 2013 15:27

Pics are worth a thousand words... Champion makes the M41E's and that's the only plug in production (that I know of) made for unshielded aircraft ignition. And the plug is made to accept the both clamp and spade leads. What kind of Mags do you have?



M41E vs. REM40E

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nkh
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Rodney Zapf
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Re: spark plugs ??

Post by Rodney Zapf » Tue Apr 09, 2013 23:55

I am quite certain I have the M-41 E plug from Champion (33+ bucks a peice) I also have the connector (clamp) shown on the bottom right. I have the Eissman mags (sometimes referred to as "suitcase" mags. The spark plug gap for the recommended unshielded plug (AH-4) is supposed to be .025. I am not sure the M-43 can be set for this much gap?? Mine are set at .018 and have worked very well for the past year. I thank you for your response. I have heard, don't fool with success! Rod Zapf

Rodney Zapf
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Re: spark plugs ??

Post by Rodney Zapf » Wed Apr 10, 2013 21:13

I have the M-41 E plugs in my Lyc0-145.
Best I can do??

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Nathan K. Hammond
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Re: spark plugs ??

Post by Nathan K. Hammond » Thu Apr 11, 2013 01:11

Yep, and gap them 18/21 per Champion's recommendation.

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Rodney Zapf
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Re: spark plugs ??

Post by Rodney Zapf » Thu Apr 11, 2013 13:18

Last checked they were gapped at .019. I will double check before re-installing--Thanks, Rod

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Re: spark plugs ??

Post by Rodney Zapf » Sat Oct 29, 2016 01:21

I have been using the "short" original unshielded spark plugs that fit nicely under the hood of my '41 chief powered by 0-145 Lyc. I would like to shield these plugs without going to the new type shielded plugs that donot fit under the "hood". Does any one happen to have a set of the "shields" I have seen that encase the old plugs so that dimpling the cowling is not necessary. Not certain what these "shields" are called, but the plug fits inside them and shielded plug wire is then connected to the mags. Rod

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Re: spark plugs ??

Post by Paul Agaliotis » Sat Oct 29, 2016 23:02

Rodney,
They are sometimes called "Breeze cups". Made by the Breeze corporation. Check with Fresno they have a nice set, but you will have to change to a shielded harness.
Paul
Mailing Adress : Paul Agaliotis 2060 E. San Martin, San Martin,Calif. 95046

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hangerash
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Re: spark plugs ??

Post by hangerash » Mon Oct 31, 2016 20:53

I could not find 'Breeze cup' anywhere but discovered this:

https://www.google.com/patents/US2080827

and this

https://www.google.com/patents/US2067614
Richard

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Re: spark plugs ??

Post by Rodney Zapf » Tue Nov 01, 2016 00:44

Wow, thanks guys, this is too much for me to digest at this time of night. I will try again tomorrow. I did try Breeze Cups and Breeze Corp. with no luck, added Fresno, still no luck--Can you help me along a little further--thanks Paul (later) found Breeze marine shielding, dated 1945 with no up dates. Looked like exactly what I am looking for but no way of contacting. Rod

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Re: spark plugs ??

Post by Paul Agaliotis » Tue Nov 01, 2016 10:16

Rodney,
Breeze has been gone for many years. Contact Fresno Air Parts, in front of Trade a Plane, they have a bunch of stuff they don't list. Ercoupe uses this style of shielding on some models.
Paul
Mailing Adress : Paul Agaliotis 2060 E. San Martin, San Martin,Calif. 95046

Rodney Zapf
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Re: spark plugs ??

Post by Rodney Zapf » Sat Nov 05, 2016 01:49

Paul. just sold an Ercoupe with the plug shielding you are referring to, that is where I got the idea. I will contact Fresno Air Parts tomorrow. Thanks for the input! The Ol' Lyc just keeps purring but sure puts out a lot of static. Rod

Rodney Zapf
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Re: spark plugs ??

Post by Rodney Zapf » Sat Nov 05, 2016 01:49

Paul. just sold an Ercoupe with the plug shielding you are referring to, that is where I got the idea. I will contact Fresno Air Parts tomorrow. Thanks for the input! The Ol' Lyc just keeps purring but sure puts out a lot of static. Rod

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