Johnson 5hp

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Crosbyman

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yes they will work ... get them while cheap
check compression before spending $$$$$ report back findings
change plug wires and boots while at it. use 7mm solid strand copper wire

local bike shops or small motor shops could sell a few feet to you

I have use basic metallic strand 7mm wires and that work to .

do not use carbon fiber wire
 
TN-25

TN-25

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A TN-28 (1952½-53) uses those coils and the regular automotive type breaker points. The older T-series, including the TD-10 & 20, plus TN-25 through TN-27 use the old guillotine style points.
 
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Crosbyman

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TN27 like the TN28 also uses the more "modern coils", points and condensers .

see Johnson manual page 29
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Crosbyman

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anytime you want to work on oldies the best book around is this one for $20 just download and print locally. save it on ypour PC hard drive. or laptop

1922-1964 Johnson 302231 Outboard Service Manual

Johnson Outboard Motor Service and Repair Manual # 302231 Tenth Edition covers all Models 1922-1964 .pdf download
watercraftmanuals.com

dirt cheap 400 page + manual covering all aspects of your engine.

J& E are cousins and this Johnson book pretty well covers what you would need on an Evinrude cousin.

covers ignition ...carbs... gear case shifting neutral on some TN,s etc... etc..
 
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