| Sezgin | -- 09-18-2023 @ 7:10 PM |
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I have been told that my motor Takes a 18mm diameter spark plug which appears to be correct. The problem I am having is the pitch measurement on plugs appears To be 1.5, but my head appears To Need a finer thread 1.25 pitch. Does anyone have any similar issues with what I am describing? Does anyone know where IMay be able to find a plug that would fit? Is there any other solution that I may be overlooking? Thanks for Any help.
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| carcrazy | -- 09-18-2023 @ 8:14 PM |
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Which engine does your 1937 Flathead have? The 60 HP engine takes a 14 mm spark plug. Champion H10 was installed at the factory. The 95 HP 21 stud V-8 engine takes an 18 mm spark plug. Champion 7 two piece spark plugs were installed at the factory. Later replacement one piece Champion 7 spark plugs were used as service replacements.
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| carcrazy | -- 09-18-2023 @ 8:18 PM |
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Regardless of the engine you have, you should be able to find spark plugs that will fit from Van Pelt.
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| same | -- 09-19-2023 @ 12:41 PM |
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I have a '37 85 hp iron heads which i use autolite 386 18mm 1/2"reach plug. have got them from napa or oreillys.they have been working well. 3-4 $ each. Tom.
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| Sezgin | -- 09-20-2023 @ 4:23 PM |
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Thanks for the responses, it turned out I had dunked Up threads in the Heads which I had mistaken for incorrect thread pitch. Chased the threads and plugs are now Installed. Thanks again
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