Topic: 1940 Johnson AT10, 5 hp Coil and Condenser – where to find?

This topic has 12 replies, 6 voices, and was last updated 3 years, 7 months ago by outboardnut.

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September 20, 2021 at 10:09 am #246939
Steven Moore
Participant
I’m looking to replace the coil and condenser and points on a 1940 Johnson AT10, 5hp. Unfortunately, I don’t have a parts manual, so I can’t list the parts numbers or search for them.

Ideally, does anyone have a part number for a newer replacement coil, points, and condenser? On-line parts books don’t seem to go back that far. Or, better yet, does anyone have a good, tested coil to sell and/or points/condenser? It’s the coil that uses grounding brushes and has the plug wires coming out each side.

I also believe it might be the same for the LT37, DT39, AT39, LT10, and DT10, but have not confirmed.

Thank you!

Steve
September 20, 2021 at 11:17 am #246942
lloyd
Participant
US Member
I have some good tested used ones (coils , points, condensers) from a TD. I think they are the same as the earlier ones? Lloyd 231-929-7479
September 20, 2021 at 1:02 pm #246943
Buccaneer
Participant
US Member
Is it this style coil?
There’s a thread on the forum about someone replacing the carbon brushes
that made their motor run good.

Or this type of coil………?

Prepare to be boarded!
- This reply was modified 3 years, 7 months ago by Buccaneer.
- This reply was modified 3 years, 7 months ago by Buccaneer.
- This reply was modified 3 years, 7 months ago by Buccaneer.
September 20, 2021 at 5:16 pm #246955
Steven Moore
Participant
It is the first of your pictures picture type. I will post a picture I just took below. Thank you so very much for the fast reply!
- This reply was modified 3 years, 7 months ago by Mumbles.
September 20, 2021 at 5:25 pm #246957
Steven Moore
Participant
Thank you for your very fast reply. I’m not certain the AT10 coil (single coil) is the same as the TD coils. Please see the picture I posted. If you do have a tested one of these At10 type coils and/or condenser, I would be happy to buy it from you.
September 20, 2021 at 6:12 pm #246962
Mumbles
Participant
AT-10 coils are different than the horseshoe coils used in the HD, TD, or TN motors.
September 20, 2021 at 6:14 pm #246966
lloyd
Participant
US Member
Thanks for the photos. The later TD coils I have are different. But I may have the coils and or condensers you need in my box full of magnetos. I will have to go up to my shop and see what I have.
September 20, 2021 at 7:41 pm #246970
lloyd
Participant
US Member
I checked my box of magnetos and sorry to say I don’t have the parts you need.
September 20, 2021 at 10:39 pm #246976
Tubs
Participant
They use the same coil in the single’s (LS & DS 38-39)
and ground out 1 lead. If you have the hardware you can
use one of them.
Tubs

A "Boathouse Repair" is one that done without having tools or the skills to do it properly.
September 21, 2021 at 7:09 am #246988
Steven Moore
Participant
Lloyd:

Thank you very much for looking. I very much appreciate your replies and efforts.

Steve
Author

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