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spark plugs and wires

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ekvisto
Posted on Monday, March 08, 2004 - 04:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I have a 1950'3 Gray Marine 6-125 and need to find the proper plugs and wires. There were none in the engine when i got it and am not sure which would be best. Any direction would really be helpful. Is it possible to just make my own wires from a kit from a 6 cyl car?

Thanks,

Eric
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olarry
Posted on Monday, March 08, 2004 - 07:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

My champion plug catologe lists D9 as the plug.You can use car wires ,but they will all be silicone wires now.If you don't have lots of electronics i would go with real wire core wires.
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kevin
Posted on Thursday, March 11, 2004 - 05:37 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I've had major trouble finding 7mm copper HT lead down here in Tasmania some thing to do with RF interferance stuffing up police radios so I,m told. I ended up getting 30'from a mower/small engine shop.
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donwhite
Posted on Thursday, March 11, 2004 - 07:26 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hello to Tasmania!
Although I was not present at the very beginning, I was alive and well when the shift from copper core wire to carbon treated string replaced the automobile’s HT wiring. Back then - the 1960s - before most cars had spark suppressors added, you sure could tell when a ‘copper core’ car pulled along side you at a stop light. His unsuppressed engine ‘ticking over’ as the Brit’s say, would override your AM band radio.

The argument raged over which HT system was better, but in the end I too, became convinced the newer, carbon impregnated material, was "better" or at least as good in conducing the firing impulse to the spark plugs. And produced little or no electrical interference. The rule in electronics, ‘it’s a 100 times cheaper to stop interference at the source than to correct for it at the receiving end,’ still applies. You might, at some point, be required to encase or shield your copper core wires.
I do love this internet! Don White, Jacksonville FL
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Eddie
Posted on Thursday, March 11, 2004 - 12:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Eric,
Don't mess with solid wires. Get a set of automotive wires of similiar size or make your own, it's actually quite easy. Solid wires being better is a myth.
Eddie
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David Price
Posted on Thursday, March 11, 2004 - 02:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Kevin

Watch this space if your after 7mm HT copper wire. I live in Tassie and bought some about a year ago - locally. Right at this momement I cant rememebr exactly where. I will scratch around over weekend and and find the invoice. (I don't throw nothing out!!!)


Dave Price

Tas
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peter ogborne
Posted on Friday, March 12, 2004 - 07:03 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Interesting subject. I have allways managed to get some copper core HT lead from some where . Shied away from the silicon type ,so can those experts out there asure me that they will be ok .
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olarry
Posted on Friday, March 12, 2004 - 12:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

You can order sold core wire from JC Whitney or John Brillman.The fellows with mags absolutly swear you have to have solid core or it wont fire the plugs or make the coil in the mag work too hard and go bad. The big problem i have with silicone wires is they go bad so quickly if you have lots of heat or vibration.One other problem with old distrubtors is they often have larger size lugs(where the wires go in)so if you buy car wires they are too small on one end.
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Eddie
Posted on Friday, March 12, 2004 - 03:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

There is a lot of myth about solid copper spark plug wires. Like other myths there is a basis in truth. Copper is an excellent conductor but modern spark plug wires, especially high performance wires, deliver adaquet if not equal performance. You are violating FCC regulations and creating a nuisense with solid copper wires. Are you sure you don't have a defective wire causing the problem? That should be the question.
Eddie
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kevin
Posted on Wednesday, March 17, 2004 - 01:57 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Hi Eddie,
I think the stray RF from my magnito would cover any from the leads
Kevin
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Eddie
Posted on Wednesday, March 17, 2004 - 07:59 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Kevin,
To be fair, I must point out that my 1970's era tune up book (worth it's weight in gold for older engines and boats) does mention metalic core wires as being the used for absolute reliability, mainly for off the street racing. It points out that high performance resistance wires provide equal performance in most cases. Again, I would only caution anyone to question any belief about a particular system or product and be open to uncovering myths that even the most clever fall victim to.
Eddie
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brian6285
Posted on Tuesday, March 23, 2004 - 03:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Sirs, what outboard motors use a Champion
QL77CJ4. I bought buy mistake thinking
these were JC4..... If I knew what they are for Ill trade someone who needs 4.. thanks Brian6285
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olarry
Posted on Friday, March 26, 2004 - 07:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

That is a commonly used outboard plug.Some examples evinrude 115hp 93 to 86,150hp 91/88 cv6,70hp 75/89,15hp 92/77.The same models with johnson name use the same.They allso fit one stern drive.
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Dave Francis
Posted on Saturday, March 27, 2004 - 07:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Solid Copper wires are the very best and last virtually forever! There used to be a high-performance chain of stores here in California,(Super Shops). Where you could buy solid copper or stainless plug wires with ease, in bulk or custom made for a particular motor. I sure miss that shop!

Dave
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olarry
Posted on Saturday, March 27, 2004 - 07:59 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Restoration supply co. sells sets for 4 and 6 cylinder engines.800-809-9156 or www.tractorpart.com
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Eddie
Posted on Sunday, March 28, 2004 - 05:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Let me add a few comments to my last message. First, I don't mean to imply that people restoring rare old engines to original condition should use carbon wires. Second, metallic wires have been used sure cure remedy for ignition problems since carbon wires came along. Carbon wires are much improved from earlier days. Also a manufacturing defect can occure with even a new set of wires. A flaw anywhere in the system will give problems, including battery, ground cables and straps, and ignition switch. Super components will not overcome a defect in another component. For instance, a high voltage coil won't overcome a fouled plug or a defective spark plug wire.
Eddie
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kevin
Posted on Tuesday, March 30, 2004 - 01:31 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Would any one have an idea what the Champion equivilent to an Edison No. 33 with 7/8" sae thread would be? Or should I ask if any one has heard of an Edison spark plug?
Regards Kevin
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olarry
Posted on Tuesday, March 30, 2004 - 12:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

My books show edison 31= 3com champion,edison 35= C4 or 2com for a hotter plug.So maybe a edison 33=a 2com which is a W18 new number champion.3com are allso listed to use a new number W18.Confused yet? 0com =w10,1com=W14,2com=w18,3com=w18
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kevin
Posted on Wednesday, March 31, 2004 - 07:36 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

olarry
Thanks very much for the information. I very much appreciate the help
Regards Kevin

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