vette10r 13 #1 Posted February 10, 2016 Hey I have a C-81 and put a different exhaust on it, the original one was completely shot and so loud I had to use ear plugs to use it. I purchased a muffler from TSC and it sounds much better now and I like the way it looks but its idling very high even with the idle all the way down. Which screws do I adjust to correct this? Thanks 2 Share this post Link to post Share on other sites
oldlineman 1,512 #2 Posted February 10, 2016 the small one in the center, it is horizontal 1 Share this post Link to post Share on other sites
WNYPCRepair 1,923 #3 Posted February 10, 2016 7 minutes ago, oldlineman said: the small one in the center, it is horizontal What are the other two for? Share this post Link to post Share on other sites
oldlineman 1,512 #4 Posted February 10, 2016 not sure but one is high speed fuel adjustment and other is low speed fuel adjustment adjustment for fuel to air mixture 1 Share this post Link to post Share on other sites
vette10r 13 #5 Posted February 10, 2016 Ok so the dark grey/black screw is what I need to adjust and im assuming adjust it in to close off the air flow? Then leave both the gold screws alone? Share this post Link to post Share on other sites
wallfish 17,826 #6 Posted February 10, 2016 Go in the manuals section and download a Kohler engine manual. It will cover how to adjust the carb. You should fix that link and adjust the governor too which is also covered in the manual 5 Share this post Link to post Share on other sites
lynnmor 7,680 #7 Posted February 10, 2016 Adjust the small black one till it idles rather slow. Now adjust the one on the left till it idles at its best. You may have to go back and forth a few times if the speed changes much. Now set the correct idle speed. Next, open the throttle quickly and see if it responds well, if not you may have to adjust the other one. Always err on the rich side (counterclockwise) because way too lean can burn valves. 2 Share this post Link to post Share on other sites
vette10r 13 #8 Posted February 10, 2016 27 minutes ago, wallfish said: Go in the manuals section and download a Kohler engine manual. It will cover how to adjust the carb. You should fix that link and adjust the governor too which is also covered in the manual Thanks, yeah I got the tractor this way. I do need to order that and replace. Thanks for the nice diagram! Share this post Link to post Share on other sites
WHX?? 51,323 #9 Posted February 10, 2016 The small black screw is in way too far as told by the very compressed spring, Follow the advice above and you hopefully have it. Yes too lean will will result in higher head temps & valve issues. Share this post Link to post Share on other sites
cleat 7,156 #10 Posted February 11, 2016 16 hours ago, vette10r said: Thanks, yeah I got the tractor this way. I do need to order that and replace. Thanks for the nice diagram! If this was my engine, I would get the correct link for it. Share this post Link to post Share on other sites
vette10r 13 #11 Posted February 11, 2016 1 hour ago, cleat said: If this was my engine, I would get the correct link for it. Yes that's my plan, I do want to restore this tractor to as original as possible so I'll slowly chip away at parts as I find them. 1 Share this post Link to post Share on other sites
