Topic: 1955 1.7 Neptune Ignition issues – Antique Outboard Motor Club,Inc

This topic has 5 replies, 4 voices, and was last updated 4 hours, 4 minutes ago by Gary Haight.

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May 31, 2025 at 10:41 am #296904
NeptuneMadness
Participant
I have a 1955 1.7hp Neptune, and the coil is junk. (it’s falling apart disintegrating) Can anyone tell me where I can see about getting a replacement or what I can use from something more modern to replace it? I was told of a place called Standard out of IL where a person got some but I haven’t been able to find the company.

Is there any way to change it over to electronic ignition?
June 1, 2025 at 9:22 am #296924
Gary Haight
Participant
US Member
Call Standard Magneto sales. 1-773-235-2010. Maybe they can help. If they do not have a direct listing, they will need to know the measurements of: 1- the steel laminate square or rectangle protruding through the center of the coil (1/2” x 9/16” or 9/16” x 9/16” as examples.

2- diameter of coil.

3- length of square or rectangle part of coil the goes over steel laminate.

4- manufacturer of magneto assembly (Wico or Eismann or Phelan as examples. The magneto plate should have the name embossed on it somewhere. If there is also a service number stamped into the plate, write the number down.

you can also email or text a picture to them.

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NeptuneMadness
June 1, 2025 at 11:28 am #296928
Tubs
Participant
With some effort, you can replace it with the common, & inexpensive, OMC style coil.

A "Boathouse Repair" is one that done without having tools or the skills to do it properly.

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NeptuneMadness
June 1, 2025 at 11:41 am #296930
crosbyman
Participant
Canada Member
nice McGiver stuff 🙂 !!

Joining AOMCI has priviledges 🙂
June 4, 2025 at 3:45 pm #297049
NeptuneMadness
Participant
Thank you very much sir! I will have to give this a try! Could you recommend a make and model of a year of motor that would have a small coil? the one in my 55 is very small. I have a coil from a 66 Evinrude 6hp but the coil is to big in width. Thank you
June 4, 2025 at 4:49 pm #297052
Gary Haight
Participant
US Member
The OMC coil swap may not work. You need to measure the depth of the coil. The OMC may be too deep. I tried it on a 1939 Neptune 1.5 hp and it did not work. The original coil was a Wico setup with a 1” depth tube and OMC was about 1-1/4” deep. I contacted Standard Magneto Sales with no luck but Doug Penn set me up with coils I could use for the 2 motors I have. I had to swap the coils from the new laminates to my old ones.
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