Red OMC coils

[joesnuffy]

Found these in a parts motor yesterday while testing timing on my home made Red Atom modules. Seems fitting that I would find a pair of red coils while building Red Atoms. They have the omc part number on them and they are marked with made in Germany. I found them in a 1950 ish twin motor that my buddy gave me for parts. He owns a local marina and has several old motors in a building at the marina that was used to do repairs back in the day.
I just wonder about when these would have been sold??? They did throw hot blue spark when I tested them by spinning the flywheel by hand.

The motor is missing the lower unit so I am guessing that is why it was set to the side. It also has a epoxy repair on the power head like it threw a rod at some point.

Just thought I would share these coils since I myself have never seen the red ones.

Joe

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[Steve D]

I don’t remember who put together this coil display but it might help narrow it down a bit.

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[bobw]

Found the same red coils in my 1958 10hp when I tore it down. They still had a really hot spark.

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Bob

1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20

“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."

[joesnuffy]

I am guessing they might be factory? They are marked as such.

Joe

[dan-in-tn]

Do they have the OMC world logo on them? I don’t remember these, but it’s been a long time. Part number doesn’t mean much, but would have probably been #580416 from that era.

Wish I could see the paperwork on that coil display. I noticed there is no mention of the #580197 coils or corresponding #580419 condensor. I did learn at Tomahawk that the laminate size is different on the "197" coils. Comes in handy on some coil swapping jobs. Kinda hard to find "197" coils today.

Dan in TN

[joesnuffy]

Dan,
The number on tag of motor is 7518 16674. I just went and looked at them I was mistaken they say"to fit OMC" then 580-416 below that and below that Made in West-Germany. They do fire hotter than a firecracker.

Looked it up it appears to be a 1958 7.5hp I guess some where along the way the coils were swapped.

thanks,
Joe

[dan-in-tn]

I don’t think any of us doubt the German coils are good? I just didn’t remember OMC ever building coils there. Everybody refers to these coils as OMC universal magneto coils. Tons of people have built them over the years. As we are learning, some good & now some don’t even fit! Of course that is a quality issue, but sometimes it takes forever for a vendor to respond to complaints.
Sorry if I am high jacking your thread?

Dan in TN

[joesnuffy]

Your not hijacking my thread. I am just trying to learn about them. I think they will get transplanted into one of my personal motors.

Joe

[51seahorsetn27]

Hell I’d like to build a set like that for my tn johnson they look like the same design, would be cool to have performance coils, im already contemplating buying a second tn and converting it into a charging style assembly using a factory flywheel and an external gm coil. For racing boat idea I have.

[joesnuffy]

Are you good at making or re-winding your own coils?

I think those red coils were replacement coils that were made in West-Germany possibly put in the 60s or 70s. The motor is a 1955 7.5hp Johnson.
The coils say "to fit OMC" so that makes me think they are a replacement coil.

They also have an older OMC part# in them. When I looked at them real close yesterday I noticed the rubber which is like shrink rap that was used on small wires where the electrical connectors are for where the small wire goes to ground and where the other small wire goes to the points was a bit dry rotted and cracked looking. Other than that the coils look brand new.

The reason I looked at them hard is I was changing the small wire that normally goes to ground and placing it where the wire normally goes to the points and putting that one that goes to the points to the ground for my home made Red Atom Module to see if that would make it fire when the flywheel was spun clockwise which it did. Before I switched them using those Red Coils I had to spin the flywheel counter clockwise to get spark. That is what is weird I was trying to come up with a simply way to make my modules that will easily work for OMC motors which I indeed have but when I put the modules in different motors some spark with the flywheel spinning clockwise some spark when it spins counerclockwise and all I can figure out is when different manufacturers build the coils some windings inside the coil are wrapped in one direction and on other coils in the other direction but switching the small coil wires fixes the problem and keeps the motor pretty much stock and the mod can be reversed back to points easily. With points it doesn’t matter which way the windings in the coil go.

Joe

ps As a side note: A couple years ago I put tried putting Nova2s in a 12hp West Bend to see if it would run on them. I had spark but when I pulled the rope the motor acted as if the timing was out. I even tried switching the plug wires. The one thing I did not try was reversing the wires on the module since I had spark I didn’t think I needed to now I question that. I have found a diode that I can put into the Nova 2 circuit that acts as both a fuse and limits the AC current that gets to the Nova that will help keep those modules alive. I am going to test run the diodes on a 9.5hp Johnson I own to see if they help keep the Novas alive. I think the reason the Nova’s may die easily for some folks is the power going to them still has a a bit to much AC current for them to handle. While using one of those diodes on my home made Red Atoms I did blow the diode the module was still good but the diode was not on this particular motor it had 2 different coils manufactured by 2 different companies.

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