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Old 08-01-2019, 11:08 PM
CubRookie CubRookie is offline
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Default K241A Exhaust Port Tap size.

Need the tap size for a K241 10hp Kohler. Measures 1.125 best I can tell. So I believe that's a 1 inch NPT tap just wanted someone to back me up on that! I have to order one.
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Old 08-02-2019, 07:55 AM
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cooperino cooperino is offline
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Not positive of size, however you probably should not use a tap. I would buy a thread chaser. Thread chasers are flatter on the tip and you dont need to run them as deep as a tap would have to go since it's not tapered.
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Old 08-02-2019, 08:34 AM
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ol'George ol'George is offline
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The exhaust ports I've encountered are a tapered pipe thread.
IIRR it should be a 1" NPT.

You might have to shorten the tap a bit on the grinder if it bottoms out before you clean up the threads.( don't turn the tap blue) keep it cool.
Epay is yer friend as you don't want to "buy" a pipe tap new,
or borrow one from a friend.
(and if you borrow one don't shorten it) Ha,LOL!
lube it and turn, stop, back out 1/2 turn and proceed again.
The port is rusted/and has carbon in it as you know.
Not rocket science
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