closha63 0 #1 Posted February 17, 2011 I rebuild my motor about 5 months ago. I used it to plow and mow the grass for about a month. I never really took notice to it but I am thinking that its not tuned right. When it starts up i cant keep it on low idle it has to be around mid-medium. Also it is hydro. so when i put the belt tensioner down to engage the trans and try to move on idle it will just cut out. Could it be something in the carb tuning? Where do most tune the needles to? Share this post Link to post Share on other sites
rmaynard 14,907 #2 Posted February 17, 2011 Start by removing the main jet needle valve and clean it thoroughly. There are holes just below the top threads, 1/2" down from the bottom threads, and 3/8" from the tip. They all need to be clean, as does the inside of the needle. You must be able to pass air through the entire inside of the tube. Next, check that your throttle shaft is not wobbly. If it is, get a kit and fix it. Most people tune by ear, so start by turning to section 6 of the Kohler engine manual, page 6.3. Follow the instructions for basic tuning. That should get you where you need to be. Share this post Link to post Share on other sites
closha63 0 #3 Posted February 18, 2011 The throttle shaft is a little wobbly in the carb. housing. You said something about a kit. What kit and where can i find it? Share this post Link to post Share on other sites
can whlvr 991 #4 Posted February 18, 2011 its called a throttle shaft kit,its a bushing that gets drilled into the top of the carb where the throttle shaft goes into the carb,if u look on ebay u can see them,some kits have the instalation tool as well,maybe someone here knows a better place 4 them,maybe member kb9lor can get these,he sells other engine parts Share this post Link to post Share on other sites
rmaynard 14,907 #5 Posted February 18, 2011 I buy mine on eBay. Since I can't post a link, search for seller "mowers4u", and look for his Kohler throttle shaft kits. Share this post Link to post Share on other sites
JC 1965 1,528 #6 Posted February 18, 2011 You can also find the bushing at Brian Miller's web site ( you can find his site here on red square ) He also gives you detailed instructions on how to install it. He also gives you step by step instructions on cleaning and adjusting your carburetor. hope this helps!! good luck :thumbs: Share this post Link to post Share on other sites
wallfish 15,932 #7 Posted February 19, 2011 http://www.wheelhorseforum.com/index.php?showtopic=13909 Share this post Link to post Share on other sites
WH nut 553 #8 Posted February 19, 2011 Sounds to me like you just need to adjust the carb. You can be sucking air through the shaft but it would have to be really bad to pervent it from idling. Back out your low speed jet anothe full turn and see how she does then fine tune from there. If she runs then turn in the low speed until she start to fall off then back it out until it runs smooth. Do the same for the high speed jet. Full RPM and adjust the same way Share this post Link to post Share on other sites
