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post #1 of 16 Old 02-22-2015, 08:31 AM Thread Starter
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electronic ignition

I have an older HM100 (mod # 159058E, ser# 0127D) that I would like to convert from points style ignition to the newer module style electronic ignition. Can this be done with the newer Ariens module and if so, what else besides the module is required? Or is there an easier method?
Thanks
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post #2 of 16 Old 02-22-2015, 09:30 AM
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I looked your engine up on Parts Tree and it looks like it has electronic ignition from the factory. If it has points the easiest would be to put a NOVA universal ignition module on. Simple bolt on to to that. Read the instructions and follow them. Usually can buy them in the 10 to 20 dollar range on E-Bay. Roger
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post #3 of 16 Old 02-22-2015, 09:37 AM
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Here's one of those ignition modules Roger mentioned.

Electronic Transistorized Ignition Module Nova II Small Engine | eBay

I've used them myself on such things as a 1949 Jacobsen Lawn King 2 stroke reel mower replacing the old Wico ignition, and they have worked very well.

I'm pretty much retired from the forum thing, but I check in every now and then.
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post #4 of 16 Old 02-22-2015, 10:23 AM Thread Starter
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This is an older 1978 era HM100 that has points,I know as I'm always cleaning them.
I tried twice to install the Nova module without any success. Accoding to the manufacturer, if there is a weak coil or the flywheel has dual magnets, it won't work. I put in a new coil and still had no luck. Removing the flywheel I saw that it looks like it has two magnets about 1 inch apart. I don't know if this is actually two magnets or just one with 2 poles, in any case I had no luck getting it to spark. I still have the module. That's the reason I was trying to find out if the later engine ignition would just drop in, with minor changes.
The reason I'd like to replace the points is that during the summer non- use time the points get a coating on them from sitting and i have to remove the flywheel to get at them for cleaning the point surfaces.
If I start it every couple of weeks during the summer, it keeps them clean. I just wanted to eliminate this constant running and come up with a better system.
I suppose I could have purchased a defective module. It wasn't actually a Nova but a similar looking item, came from Jack's Small Engine.
rick

Last edited by rick; 02-22-2015 at 10:35 AM. Reason: additional info
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post #5 of 16 Old 02-22-2015, 10:54 AM
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I put one on a '66 HMSK6 and it works very good. Make sure the unit has the anti kick back feature. If not, it yanks the starter rope out of your hand, and that REALLY HURTS.
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post #6 of 16 Old 02-22-2015, 12:37 PM Thread Starter
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I'll check for a diag of the HMSK6 ignition and see if it's the same as mine.
Thanks to all that responded,
Rick
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post #7 of 16 Old 02-22-2015, 01:03 PM
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Quote:
Originally Posted by rick View Post
I have an older HM100 (mod # 159058E, ser# 0127D) that I would like to convert from points style ignition to the newer module style electronic ignition. Can this be done with the newer Ariens module and if so, what else besides the module is required? Or is there an easier method?
Thanks
the best electronic conversion for old point ignition, is the Nova II, I've had one on my Gilson 16HP Briggs tractor for about 10 years now. The machine sits outside and never fails to start year after year for snow plowing. I also installed the Nova II's on a handful of old snowblowers, and the performance is like day and night, in regards to ease of starting, and stable ignition. I highly recommend it.

you do not have to get the magnets repolarized, and it's cheaper than points/condenser. this is a win-win-win.

here's the link. there's a reason why he sold 660 of them. they are the best darn thing since sliced bread. if God made a better ignition conversion, He kept it for Himself







just say NO to Chinese made ANYTHING !
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post #8 of 16 Old 02-22-2015, 01:41 PM
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Quote:
Originally Posted by rick View Post
I have an older HM100 (mod # 159058E, ser# 0127D) that I would like to convert from points style ignition to the newer module style electronic ignition. Can this be done with the newer Ariens module and if so, what else besides the module is required? Or is there an easier method?
Thanks
Try slapping on a used (or new) magneto in place of the old coil. (Take your existing coil down to your local small engine repair, ask if they have any used magnetos that would fit same hole mounting pattern. Offer them $5).

I would take out the points & condenser, and save them for later; but you could just cut off the existing condenser wire to save time. Personally I'd yank them out and save them just in case.

To mount the magneto, turn the flywheel so the magnets on the other side of the engine; away from the coil; then remove the bolts holding the old coil.

Mount the new magneto about 1/4" from the flywheel and tighten only enough to keep it from moving.

Put some cardboard, about the thickness of a business card or so (looking for about 20 thousandths), between the magneto and the flywheel, then turn the flywheel so the magnets are facing the magneto pickup arms (keeping the cardboard in place).

Loosen the magneto mounting screws and the magnet will pull the magneto tight against the business card(s). This will work for setting the gap.

Tighten the magneto screws good and tight, then rotate the flywheel to remove the business cards.

Magneto's have a tang on them for killing the engine. Run a wire from a kill switch to this tang. When this tang is grounded, the engine will stop.

There are several YouTube videos on this, here's one on converting an older B&S to magneto.

2014 Ariens 24" Platinum
2010 Yard Machines 600 Series, 24" w/179cc MTD engine
Toro CCR 3650 GTS
Troy Bilt 521OR w/Tecu HSSK50 engine
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post #9 of 16 Old 02-22-2015, 01:45 PM Thread Starter
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Mine looks the same but does not say Nova on it. I'll go ahead and order the Nova unit and give it another try. As I said before, maybe I picked up a bum unit. I'll have to wait until spring, since were up to our eyeballs in snow here in Massachusetts.
Thanks for the information.
Rick
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post #10 of 16 Old 02-22-2015, 02:12 PM Thread Starter
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Hey thanks Enigma-2!!! That's exactly what I was looking for! Although mine is a Tecumseh engine, it should be the same procedure. I'll just have to look at the mags for that brand. I had been looking at various Tecumseh replacement mags with the idea of doing just this procedure, just didn't know if the flywheels were different to go with the mags.
I'll try the Nova 2 conversion and keep this magneto change available in case I still have no luck with the Nova.
Thanks again,
Rick
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