whtractors24 2,898 #1 Posted October 13, 2014 I have a nice fully rebuilt c-161 with a k-341as rubber mounted motor. everytime I hit a bump in the yard in spits &sputters. so I pulled carb apart went through it 100% & adjusted it to specs then played with it from there same results.. if Ihave it at full throttle sitting in the shed running grab the motor with my hands and shake it just a little it sputters. I adjusted the float many ways and re did all the grounds. spark is strong point condenser and coil and plug are all new! 1 thing on the side of carb Idk if there was a freeze plug down the road some one jb welded it! also when you have the carb flipped over if you look in the center as you thread the high jet in it is not 100% straight it walks back and forth such as it may be bent slightly! that matter? I am very knowledgeable about carbs I am at the point to replace it ? also I tried adjusting the govner and the spring nothing... Share this post Link to post Share on other sites
oldredrider 2,547 #2 Posted October 13, 2014 Would help to know if it's Kohler or Walbro carb. The Kohler carbs have a baffle above the float to reduce splashing fuel. Share this post Link to post Share on other sites
whtractors24 2,898 #3 Posted October 13, 2014 It's a kohler carb and yes it is in there I tried it both ways still same . Share this post Link to post Share on other sites
whtractors24 2,898 #4 Posted October 13, 2014 I ordered a new adjustable one at work today my cost 150 hope this solves it. Still WA t to know how and why it does this. I don't like giving up on things. Share this post Link to post Share on other sites
oldredrider 2,547 #5 Posted October 13, 2014 I had a Walbro carb on my C-160 that I thought was doing the same thing...sputter and such every time I hit a bump. Just before tearing it apart to investigate, I discovered, by accident, it was an electrical problem...one of the ammeter connections was bad. Just food for thought before you lose your mind. Share this post Link to post Share on other sites
whtractors24 2,898 #6 Posted October 13, 2014 Thanks I went through all that I can grab jus the motor since it's rubber mounted and shake it with my hands and still cuts out sounds as if fuel I'm guessing. Share this post Link to post Share on other sites
WH nut 553 #7 Posted October 13, 2014 Sounds like electrical to me. You state its mounted on rubber and cuts out when you shake the motor. Common sense says ground Share this post Link to post Share on other sites
whtractors24 2,898 #8 Posted October 13, 2014 Grounds were all sanded to bare metal.the one from the battery to the starter. Then there is one ground from the cradle mount to the the bolt that is mounting the cradle mount to the frame. Share this post Link to post Share on other sites
WH nut 553 #9 Posted October 13, 2014 Grounds were all sanded to bare metal.the one from the battery to the starter. Then there is one ground from the cradle mount to the the bolt that is mounting the cradle mount to the frame. Still sounds electrical to me, Try running a jumper from battery+ to coil + and retry. Also check wire from coil- to points for chaffing. Also make sure points aren't grounding out. Share this post Link to post Share on other sites
whtractors24 2,898 #10 Posted October 13, 2014 Messing with it now I agree after I did the ground it stopped cutting out now just runs like crap. Share this post Link to post Share on other sites
WH nut 553 #11 Posted October 13, 2014 Ok if the cutting out has quit fuel is your next step. Let us know your findings Share this post Link to post Share on other sites
whtractors24 2,898 #12 Posted October 13, 2014 Points are new I will jump the battery from +to the coil good idea Thank you man its tough with it being repainted from last guy. I'm putting new carb on tommorow so we will see. And the ground from the battery goes to the starter mounting bolt. Then likening said b4 I have a ground from cradle mount to the mounting bolt that goes to the cast spacer that hold the cradle to many variables lol. Share this post Link to post Share on other sites
WH nut 553 #13 Posted October 13, 2014 Paint is pretty but can cause a lot of electrical issues. Share this post Link to post Share on other sites
diamondred 63 #14 Posted October 14, 2014 Carbs don't come with JB weld on them. I would suspect that first. I had rebuilt a carb on a tecumseh in which the rebuild kit had two "mini" freeze plugs to replace. After drilling and digging the old ones out, I find that they covered passage ways for fuel/air. There were holes drilled in different directions and covered by these plugs, allowing the passages to be connected together. Notes told me to use fingernail polish to seal these plugs and carefully peen these into place. I'm thinking it's possible that the plug fell out and was covered with JB weld and may have blocked the passage ways....? I don't know that I would replace these plugs again unless absolutely necessary. Share this post Link to post Share on other sites
diamondred 63 #15 Posted October 14, 2014 Also to add..... I adjust the floats to close a little earlier than the specs, but thats just me. Share this post Link to post Share on other sites
whtractors24 2,898 #16 Posted October 14, 2014 (edited) OK So I Dont Believe IT'S Grounds Ran + Direct To Coil STill Runs Like crap. Hers are the photos of issues I think no found the job weld I pulled off and found this hole that routes to the hole in the 2nd pic. The 3rd picture is where it looks like some one either tried to tap or thread something in the port. Edited October 14, 2014 by jason.c Share this post Link to post Share on other sites
diamondred 63 #17 Posted October 14, 2014 Thats an air passage. Per say, a float bowl breather. If the needle valve gets dirt in in it, or the float is water logged, the bowl will fill with fuel and come out of these holes. Check float by putting it in a cup with fuel and make sure it doesn't sink. Put it back together, with the carb in the working position, gravity feed some fuel into it and make sure the needle valve is doing its job. Share this post Link to post Share on other sites
whtractors24 2,898 #18 Posted October 14, 2014 Yes but thay whole is a lot larger that it is supposed to be it should be a pin size hole! Share this post Link to post Share on other sites
diamondred 63 #19 Posted October 14, 2014 I really don't think there is suppose to be a hole there. If so, I don't think they would have went to all the trouble to vent the bowl area to the end of the carb in pic #3. I would make sure the passage is clear and re-seal the hole shut so dirt don't get in the bowl. The air that comes into bowl ( if any), has come through a filter. ... I know .... I don't like giving up on stuff either.... so I keep fixin til its broke. Share this post Link to post Share on other sites
whtractors24 2,898 #20 Posted October 14, 2014 Your correct here is the new one just arrived no hole there! Share this post Link to post Share on other sites
diamondred 63 #21 Posted October 14, 2014 Just love those fully adjustable carbs ! Let me know if you want to get rid of the old one... pm Share this post Link to post Share on other sites
whtractors24 2,898 #22 Posted October 14, 2014 Runs perfect all set and yes pm me 1 Share this post Link to post Share on other sites
