motor12 367 #1 Posted November 21, 2014 I don't know if this info is out there, I didn't do a search. On the Chinese carbs that replace the Kolher K181 the fitting that the gas line goes to is not a pipe thread nor is it metric. It is known as British and it screws into the carb and seals with an o-ring and washer then a second fitting with a barbed shank screws into that fitting and is sealed by compression. Do not try to force a pipe thread fitting you will only damage the carb. I installed one today simple and leak free. 1 Share this post Link to post Share on other sites
Jake Kuhn 1,579 #2 Posted November 21, 2014 Thanks for the tip, I noticed that the other day on a aftermarket carb I bought for a k91. Where can I purchase the parts needed? Thanks, Jake Share this post Link to post Share on other sites
Lane Ranger 11,155 #3 Posted November 21, 2014 Very good information Motor12 ! Thanks for posting this! Share this post Link to post Share on other sites
motor12 367 #4 Posted November 22, 2014 I got these fittings at Rivercity air & hydraulics here in Austin,tx but I'm sure any company that makes up hydraulics hoses will have these fittings. 1 Share this post Link to post Share on other sites
Gary L. 12 #5 Posted November 27, 2014 Just installed one of these on a k181 and found that also, what thread size do they call that ?? Share this post Link to post Share on other sites
motor12 367 #6 Posted November 27, 2014 Just installed one of these on a k181 and found that also, what thread size do they call that ?? I was so grateful to find the correct fitting I forgot to ask what size British fitting was used. Tomorrow I will call the business where I got it and see if I can get the thread size. My receipt doesn't show fitting size. I will post as soon as I find it. Share this post Link to post Share on other sites
motor12 367 #7 Posted November 29, 2014 they were closed today, I'll try Monday Share this post Link to post Share on other sites
diamondred 63 #8 Posted November 29, 2014 Whitworth threads? Share this post Link to post Share on other sites
motor12 367 #9 Posted December 1, 2014 (edited) Talked with Rivercity today and was told a .2 in a British thread is equivalent to an 1/8 in pipe thread. For a 1/4 pipe thread a .4 British thread was the equivalent. Check your size or take carb with you to make sure you get the correct size. Edited December 1, 2014 by motor12 Share this post Link to post Share on other sites
wheel-mule 46 #11 Posted December 7, 2014 (edited) If it a carb someone has bought from me they are 1/8 npt.The first (early) ones made were not taped deep enough.The problem has now been corrected.I would run a 1/8 npt tap in a little deeper.The british thread is a stright thread called 1/8 British standard stright pipe thread. Edited December 7, 2014 by wheel-mule Share this post Link to post Share on other sites
