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Coils for 2 cylinder points type?


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#1 Paulgo OFFLINE  

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Posted February 13, 2016 - 07:52 PM

I need a new coil (# 166-0772) for one of my 2 cylinder Onans with points ignition. The actual Onan coil is about $100. Found this unbranded lookalike for $68.

Ecoil.jpg

 

Then I found this Emgo 48-98618 universal coil for points model engines at $42. Looks identical, other than the chrome, to the original.

emgo48-98618.jpg

 

I assume they are both Asian.  I also did a search for the fabled dirt cheap Harley coil everyone talks about.  Found about 20,000 listings to dig through for those.  Anyone have any experience or thoughts to share?

 

Paul

 


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#2 Oldford OFFLINE  

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Posted February 13, 2016 - 08:45 PM

Stock Harleys have one set of points firing both cylinders.  If your onan is that way you could try an old harley points coil.  They went to electronic ignition around 78-79 as i recall.

If your onan has two sets of points that's totally different, harley ran a dual point distributor for a few years in the early 60s, would be hard to find a coil for that, good luck



#3 LilysDad ONLINE  

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Posted February 13, 2016 - 08:49 PM

The Onan look alike has two ignition connections. The Emgo only one. ???



#4 Paulgo OFFLINE  

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Posted February 13, 2016 - 08:55 PM

Stock Harleys have one set of points firing both cylinders.  If your onan is that way you could try an old harley points coil.  They went to electronic ignition around 78-79 as i recall.

If your onan has two sets of points that's totally different, harley ran a dual point distributor for a few years in the early 60s, would be hard to find a coil for that, good luck

 

One set of points firing both cylinders on the Onan. The Harley coils I saw were square and I couldn't tell which one to use. Too many options.

The Onan look alike has two ignition connections. The Emgo only one.?

Not sure what you're saying. They both have two posts for plug wires, along with a screw from the battery and one for the points. Second screw isn't visible on the Emgo as it is in back.


Edited by Paulgo, February 13, 2016 - 09:02 PM.

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#5 Paulgo OFFLINE  

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Posted February 13, 2016 - 09:07 PM

Here is a better view of the Emgo "Harley type" coil.

emgo2.jpg


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#6 Trav1s ONLINE  

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Posted February 13, 2016 - 09:14 PM

http://www.kirkengin...p#DualSuperCoil

 

Kirk's parts are worth the money.  Also check out the Solid state ignition that looks like a condenser.


Edited by Trav1s, February 13, 2016 - 09:17 PM.

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#7 jms180 ONLINE  

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Posted February 13, 2016 - 09:16 PM

Onan engines fire both cylinders at same time


Edited by jms180, February 13, 2016 - 09:17 PM.

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#8 MiCarl ONLINE  

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Posted February 14, 2016 - 08:12 AM

On a lot of motorcycles one coil fires two cylinders.  At each revolution one or the other is at the end of the exhaust stroke, called wasted spark.  I suspect that is what the Onans are doing.

 

With points type coils I think they're all interchangeable.  It comes down to which package best fits the installation and budget.


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#9 KennyP ONLINE  

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Posted February 14, 2016 - 08:20 AM

On a lot of motorcycles one coil fires two cylinders.  At each revolution one or the other is at the end of the exhaust stroke, called wasted spark.  I suspect that is what the Onans are doing.

 

With points type coils I think they're all interchangeable.  It comes down to which package best fits the installation and budget.

You are correct on the 'wasted spark'.


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#10 Bolens 1000 ONLINE  

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Posted February 14, 2016 - 08:47 AM

If it is a genuine Onan coil for $100 thats not a bad price at all in my opinion.



#11 jms180 ONLINE  

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Posted February 14, 2016 - 12:14 PM

:ditto:

You are correct on the 'wasted spark'.

 



#12 Oldford OFFLINE  

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Posted February 14, 2016 - 03:55 PM

This would be the harley equivalent of a single points coil.

http://www.ebay.com/...3pWhGmq&vxp=mtr

 

I'd look for a cheap used one and see if it works.  An old chopper shop would probably just give you one.  good luck


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#13 Paulgo OFFLINE  

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Posted February 14, 2016 - 10:25 PM

This would be the harley equivalent of a single points coil.

http://www.ebay.com/...3pWhGmq&vxp=mtr

 

I'd look for a cheap used one and see if it works.  An old chopper shop would probably just give you one.  good luck

That must be the one. Dirt cheap is right. Hardest thing will be to figure out how to mount the odd shaped unit. It's either that or try the chrome one that will fit the existing bracket. Thanks!


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#14 TAHOE ONLINE  

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Posted February 15, 2016 - 07:51 AM

I would have to search, I've seen somewhere a couple guys using a GM coil that had dual plug outputs used on some older GM 4cyl cars. They are only like $25-30 for the coil and worked well on an Onan


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#15 Oldford OFFLINE  

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Posted February 15, 2016 - 10:15 AM

That must be the one. Dirt cheap is right. Hardest thing will be to figure out how to mount the odd shaped unit. It's either that or try the chrome one that will fit the existing bracket. Thanks!

The round style coil was stock on older Harleys, through the 60's, they came in black, cheaper and sheds heat better than chrome.  Most of them are for 6v tho.

 

If you find a square style you'd have to make sure it's for points, i.e. higher resistance pre-79, and make sure no cracks, or it's shot.   84-up are cheap used but being for electronic ignition may have lower resistance which is hard on points but you'd need to research.  4-5 ohms is what you need for points at least on a harley or else you'd have to wire in a resistor like from an old dodge truck.

 

A 35+ year old coil isn't worth 5 bucks imo unles NOS like the one i linked to earlier.  Aftermarket harley coils cost around 50 bucks and made in china so you might be better off with a tractor-style one, good luck. 


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