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1958 Johnson 18hp ignition coil
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<blockquote data-quote="Pappy" data-source="post: 438033" data-attributes="member: 3278"><p><span style="font-size: 18px">If you go down about one thread you will see an answer there. </span></p><p><span style="font-size: 18px">OEM coils are made with the correct radius to give you an almost perfect air gap vs the "will fit" coils. </span></p><p><span style="font-size: 18px">Make sure this engine is run on nothing less than a 24:1 mixture. Will last a lifetime this way if taken care of properly. </span></p><p><span style="font-size: 18px">Also am hoping you are changing the impeller as well...... Check gear oil for water. </span></p><p><span style="font-size: 18px">In 1958 they went to the smaller 10hp style gearcase minus the large rear bolt. Good gearcase but not quite as heavy duty as previous years. </span></p><p><span style="font-size: 18px"></span></p></blockquote><p></p>
[QUOTE="Pappy, post: 438033, member: 3278"] [size=5]If you go down about one thread you will see an answer there. OEM coils are made with the correct radius to give you an almost perfect air gap vs the "will fit" coils. Make sure this engine is run on nothing less than a 24:1 mixture. Will last a lifetime this way if taken care of properly. Also am hoping you are changing the impeller as well...... Check gear oil for water. In 1958 they went to the smaller 10hp style gearcase minus the large rear bolt. Good gearcase but not quite as heavy duty as previous years. [/size] [/QUOTE]
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1958 Johnson 18hp ignition coil
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