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18mm Spark Plug Recommendation

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delovett View Drop Down
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    Posted: June-09-2014 at 12:37pm
That was fast!

Thanks everyone!
1973 Nautique 351
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TRBenj View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TRBenj Quote  Post ReplyReply Direct Link To This Post Posted: June-09-2014 at 12:19pm
Like zach said, 124's work well. So do the 45's.
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phatsat67 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote phatsat67 Quote  Post ReplyReply Direct Link To This Post Posted: June-09-2014 at 11:18am
Autolite 124s are the equivalent of the 24 in a 18MM thread size.
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delovett View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote delovett Quote  Post ReplyReply Direct Link To This Post Posted: June-09-2014 at 11:01am
Looking to replace my plugs on the '73 351. Had planned on going with the autolite 24s, but my heads take an 18mm. Boat currently sports some NGK WR5s.

Any suggestions for an 18mm plug that I should use?

Derek
1973 Nautique 351
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