FAST 87 #1 Posted October 31, 2019 (edited) I bought a C161 about a month ago and just now getting a minute to clean the carb and replace the fuel lines. That mission was a success. It now will run above idle and not want to stall. It throttles up and down but the problem I’m having is when you throttle up you don’t move the throttle very far and it’s really hitting some high RPM. The throttle cable is the smoothest working cable I have ever had so that can’t be it. It just seems to sound like the RPM are way to high when you full throttle so I’m not doing it because it makes me really nervous. Sounds way higher rpm than my c141. Also when your adjusting the throttle The motor RPM goes up fast to the slightest change to the throttle. I’m not used to such a touchy throttle on a lawn tractor. It also backfires sometimes when you back off the throttle. Sorry this is so wordy, I’m just trying to give any and all info that my be useful to finding a solution. Any help would be greatly appreciated. Edited October 31, 2019 by FAST Share this post Link to post Share on other sites
tunahead72 2,459 #2 Posted October 31, 2019 Sounds like your throttle cable needs to be adjusted. Do you have the Kohler engine on that machine? If so, there's a high speed limiter on the front of the engine. I'll let someone else who knows these machines better than I do explain the process, it's also in the service manual here on the forum. You definitely don't want to overrev the engine. If it sounds too fast, it probably is. Maximum recommended engine speed is 3600 RPM with no load, 3400 under load. 1 Share this post Link to post Share on other sites
FAST 87 #3 Posted October 31, 2019 Yes it is a Kohler 16hp.ok thank you for that suggestion. I will have to do some looking. If anyone else has more insight or suggestions that would be great. Thank you Share this post Link to post Share on other sites
The Tuul Crib 7,338 #4 Posted October 31, 2019 Check to see which hole the Governor arm is Connected to the throttle on the carburetor. There are three holes that it can go in sometimes that can have affect on a touchy throttle . 2 Share this post Link to post Share on other sites
Herder 2,354 #5 Posted October 31, 2019 Here are some pics of carb and linkage on a few of my k-series. I posted them before as reference points. Hope it helps. this pic (Above) shows the throttle cable connection to the linkage. I can effect RPM 3 2 Share this post Link to post Share on other sites
FAST 87 #6 Posted October 31, 2019 Wow thanks so much for those photos. I was searching google just a few minutes ago looking for pictures of the front of the motor. Thanks so much 2 Share this post Link to post Share on other sites
FAST 87 #7 Posted October 31, 2019 (edited) I’m on the right track with the governor and cable position. Thanks so much. Got it throttleing way better and more like normal. Ran out of time so I will have to mess with it more later. It is making kind of a pop noise as it idles. It idles smooth and normal then a little stutter pop type sound. Any ideas what that may be? Edited October 31, 2019 by FAST Share this post Link to post Share on other sites
The Tuul Crib 7,338 #8 Posted October 31, 2019 The pop sounds like it possibly might be a timing issue or the points. The points will be set at .20 at top dead Center 1 Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,148 #9 Posted November 1, 2019 Sounds like you possibly have an exhaust valve not closing 100% 100% of the time. Marvel Mystery oil in the fuel may correct that by lubricating the valve stem. Garry 3 1 Share this post Link to post Share on other sites
Pullstart 63,263 #10 Posted November 1, 2019 Have you tried adjusting the governor? With the springs and whatnot in the linkage system, the governor should be able to limit rpm’s no matter where you have the throttle cable. 1 Share this post Link to post Share on other sites
FAST 87 #11 Posted November 1, 2019 I did adjust the governor and that helped get the RPM at about perfect. If anything now it’s a touch to low at full throttle. I was thinking on it and definitely going to check the points and timing. The guy said he just had it redone when I had bought it but I am Going to check it as it’s probably off. I will also put the marvel mystery in my gas. I did have a tap tap tap especially could hear it at idle. Thank you for all the tips and hints as to what to check. Share this post Link to post Share on other sites
stevasaurus 22,937 #12 Posted November 1, 2019 In @Herder 's 2nd, 3rd & 5th picture, you can change the length of pull or push on your lever by moving the cable through that clamp a bit...it does not take too much to change that. That can also effect the hi and low RPM's. Leave the screw that tightens the actual wire where it is when you adjust the outer sleeve in the clamp. If you find your points are set at .020, try setting them at .018 and see if that helps the tap tap. 1 Share this post Link to post Share on other sites
FAST 87 #13 Posted November 1, 2019 My points where probably 22 or even a touch bigger. Adjusting it got rid of the little pop noise but I’m going to try the .18 and see how that does. Worth a shot. You guys have helped a lot. Got me heading in the right direction faster. Thanks so much. Had it out and driving around for the first time since I’ve owned it. Bought the blueprints from PF engineering for the loader and backhoe attachment and this is the tractor I want to do this to so this was a great step toward having confidence in doing that. Gotta look up info now on how to do a foot control for forward and reverse. 2 Share this post Link to post Share on other sites
FAST 87 #14 Posted November 1, 2019 Is the spring on the throttle linkage and governor supposed to be sloppy or should it be almost snug with throttle all the way to idle position? Mine has a lot of play at idle position. Share this post Link to post Share on other sites
stevasaurus 22,937 #15 Posted November 1, 2019 Not sure about that, but I would think it should be snug...not tight. A little slop may be OK. 1 Share this post Link to post Share on other sites
oliver2-44 9,955 #16 Posted November 2, 2019 You might check the timing with the method described in this thread 3 Share this post Link to post Share on other sites
