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14mm- 10mm brass plug adapter

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Old 12-19-2017, 10:02 AM
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karolh
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Default 14mm- 10mm brass plug adapter

I recently installed a brass 14mm-10mm brass plug adapter in my Zen engine and it runs just as well as before with it's now smaller CM-6 plug. Due to the thickness of the adapter the plug tip does not extend as far into the combustion chamber as before.

My question is this; has anyone ever run a spark plug without it's usually supplied crush washer without having any leakage issue ?
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Old 12-19-2017, 11:01 AM
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Truckracer
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I've used taper seat plugs in non-taper seat heads with good results but that doesn't apply here. I've flattened the washers before in automotive applications where I wanted to index a plug but I'm not sure that would help enough to lower the plug into the insert. Heck if it starts and runs as expected, I'd just leave it alone.
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Old 12-19-2017, 11:08 AM
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karolh
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Originally Posted by Truckracer View Post
I've used taper seat plugs in non-taper seat heads with good results but that doesn't apply here. I've flattened the washers before in automotive applications where I wanted to index a plug but I'm not sure that would help enough to lower the plug into the insert. Heck if it starts and runs as expected, I'd just leave it alone.
Why try to re-invent the wheel.......think I'll take your suggestion and leave it alone.
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