Topic: 1965 Johnson 18FM-18E bolts on coils broke now got a mess

This topic has 8 replies, 5 voices, and was last updated 1 year, 4 months ago by Steve D.

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July 17, 2024 at 7:58 pm #289224
Hugh Davis
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This beloved member of family went swimming then was pulled out of water and left for a few days

We got her cleaned up and running like a champ but somehow the coil bolts loosened and broke free cannonballing the magneto plate and one coil around under flywheel.

we cannabalized an old 1957Johnson 18 FDL-13 coil and have good blue spark but can get her to get going again; I can sometimes get it to backfire and act like it want to start up but I haven’t gotten farther than that.

Can anybody tell me what gap the coils should have or any other possible solutions?

20 thousandths is not working

Thanks.
July 17, 2024 at 8:03 pm #289225
crosbyman
Participant
Canada Member
coil gaps ?? or points gap ???

coils should line up on their mounting … fingernail should not snag up or down

points are .20 change or test capacitors ! test secondaries OHMS values 4-8kohms

Joining AOMCI has priviledges 🙂
July 17, 2024 at 8:25 pm #289227
Hugh Davis
Participant
sorry what I meant to say is the gap on the points.

and Thanks!!!!
July 17, 2024 at 8:46 pm #289228
Tubs
Participant
Check to be sure you havent switch the spark plug wires.

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

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Hugh Davis
July 18, 2024 at 6:46 pm #289252
fleetwin
Participant
US Member
Or, perhaps you have the coil primary leads routed to the wrong points, or perhaps the point cam is upside down..
July 21, 2024 at 9:13 am #289309
Hugh Davis
Participant
Tubs wrote:

Check to be sure you havent switch the spark plug wires.

boat, the top wire still has its steel ring band marking which is which
July 21, 2024 at 9:14 am #289310
Hugh Davis
Participant
Fleetwin, thanks! Will check this.
July 21, 2024 at 9:18 am #289311
Hugh Davis
Participant
Would anybody have a part number for the coils on this FM-18E ? I think I should be able to find after market from Sierra.

Thanks!!

Hugh
July 21, 2024 at 8:17 pm #289334
Steve D
Participant
Do you mean points or coils? Not sure what motor you have but here are the numbers for the universal ignition coil. Some have had various degrees of success, problems with fit, etc. with the real cheap ones on ebay

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