| mzahorik | -- 07-31-2021 @ 10:04 AM |
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I have NGK B6-L spark plugs in my 59 series flat head. Looking at the combustion chamber with the plugs installed, the bottom of the plug is not flush with the head surface. Maybe one thread is exposed. Could this present a hot spot? What plugs are correct for this engine? Thanks, Mike
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| 51504bat | -- 07-31-2021 @ 3:19 PM |
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Champion H-10's per my Motors Manual. last set I bought at the parts store were individually packed and labelled as lawn mower plugs. I currently am using Auotlite 216's but ran H-10's before that in my 8ba. ______________ No signature
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| carcrazy | -- 07-31-2021 @ 3:51 PM |
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If the threads on the spark plugs protrude into the combustion chambers, you can use Spark Plug Indexing Washers to space the plugs so they are flush with the cylinder head inner surface. These washers are available in various thicknesses: 0.30 mm, 0.50 mm and 0.80 mm from Speedway Motors.
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| supereal | -- 08-06-2021 @ 12:07 PM |
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I use the Champion RJ14YC in my '47. They have a long nose that reduces the typical oil fouling that is common with the H-10s.
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