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03-24-2019, 12:59 PM | #1 |
Not Yet Wild
Join Date: Dec 2018
Posts: 6
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Using universal Duralast ignition coil
Cart is a 1995 Yamaha G9
I am wondering if I can replace my OEM ignition coil with a universal coil from AutoZone? From what I have seen it looks like it should be a drop-in replacement I plan to also change out the ignitor if this does not work. Here is a link to the coil that I am referring to thanks. https://m.autozone.com/ignition-tune...402_17367?aqs= |
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03-24-2019, 06:26 PM | #2 |
Nincompoop village idiot
Join Date: Apr 2018
Location: Michigan
Posts: 9,625
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Re: Using universal Duralast ignition coil
I dont know if/how that would work with the OEM ignitor but I do know for certain if you convert to HEI using Chrysler kit, the generic Chrysler ignition coil works great.
If you try let us know. Worst case if not, convert to Chrysler HEI and you'll be good. The HEI parts are only.sround $30 for everything. |
03-25-2019, 01:01 AM | #3 |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: Using universal Duralast ignition coil
Problem with the hei conversion (be it GM HEI, or Chrysler) is you lose any spark advance offered in the original system. I wish I had a good "other idea", but I'm not happy with the idea of no spark advance. Probably will run better than non-functional OEM ignitor. Your results may vary, and if it's right for you, fine by me. My $0.02.
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03-25-2019, 07:07 AM | #4 | |
Nincompoop village idiot
Join Date: Apr 2018
Location: Michigan
Posts: 9,625
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Re: Using universal Duralast ignition coil
Quote:
What kind of performance would you expect with OEM ignitor? |
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03-27-2019, 01:32 PM | #5 |
Vegas modded 420
Join Date: Jun 2009
Location: West MI
Posts: 15,433
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Re: Using universal Duralast ignition coil
The OEM cuts timing at low rpm iirc under 2500 it goes down to zero advance at 1000 or something like that. This makes it start easier and not spark knock, etc. I think it is a hall effect there seems to be no magnet in the flywheel. I looked for something similar but found nothing other than GY6 boxes that are higher rpm so if they did work the advance was not right. They call the G9 a tfi not a cdi, iirc, some of it is in the manual you can get free here.
So in the end if you got the chrysler ignition going it should run the same at 2500 and up rpm, but it could get hot or knock at lower rpm or start hard when hot, etc. There are sticky threads here explaining it all, plenty of people have converted them. I think it works ok mostly because the comp level is pretty low, though the G2 is said to have more compression. Or the engine is tired and low comp. To a lesser extent the new UT2 and b&s coil ignitions do the same thing and lower timing at low rpm but not as far best I can tell. These new ignitions are used on b&s and honda and even on clones now. They are a different style of the old magneto which I think are used on G16 yamaha and newer (not 100% sure what ones) and commonly used on many lawn engines, with a coil over a big magnet on the flywheel. They call the new ones electronic coil ignitions, UT2, etc. However they take a different flywheel with an advanced magnet position to work properly, the coil then retards the timing at low rpm and lets it go through advanced at high rpm. The old style coil and flywheel are different and locked at whatever advance all the time, the old coil does not have an electronic component to it. For the honda ut2 you can buy a new coil from NR racing without a 4K rpm rev limit, for performance use. I don't remember if the B&S has a rev limit. I have wanted to put my old ignitor on my clone but would have to make a window on the flywheel somehow. It would be easier to convert it to the UT2. But yeah it runs ok now I have many other mods to do to it lol like a different carb that may run nicer. This is what I found researching it, really you have limited options for small engines they are still in the 1800s for technology until the recent move to electronic magnetos I explained above, which have far as I found about 10 degrees advance (I could be wrong) while the G9 would run near 30 degrees change in advance according to the manual. But hey some is better than none. |
04-02-2019, 07:38 PM | #6 |
Not Yet Wild
Join Date: Dec 2018
Posts: 6
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Re: Using universal Duralast ignition coil
Thanks for the help everyone. The coil did work however it produced similar results so I went back to my OEM coil.
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