DCs, 25 Kohlers and dust

Discussion in 'Lawn Mowing' started by Richard Martin, Oct 27, 2001.

  1. Richard Martin

    Richard Martin LawnSite Fanatic
    Messages: 14,699

    If you're running a DC with the 25 Kohler and have the Thompson filter system you should check the seal or lack-there-of between the aluminum Kohler air filter housing and it's baseplate. Since it has been so dry here and I am grinding up leaves I decided to pull my entire filter system apart to check for dust and I found a lot of really small dust inside the Kohler filter housing. It has been leaking past the non-seal between the housing and the baseplate. A trip to the hardware store netted me a 12" by 12" peice of 1/16" thick rubber. I cut myself a nice rubber seal for the bottom of the housing.

    Eric, if you read this you may want to pass this along to Art when you see him this week. The best air filters in the world don't do a lick of good if dust is getting by them.
  2. everglen

    everglen Guest
    Messages: 0

    I have just had my walker with kohler 20 hp pulled down and re -ringed due to the same problem.The breather hose under base plate of the carby was found not to be correctly clipped into base which caused large amounts of dust to be sucked into carby.This was covered by warranty but only by 2 months left in warranty period .Any one with a kohler engine should check same.
    redards Dave from the land down under:angry:
  3. HOMER

    HOMER LawnSite Gold Member
    Messages: 3,183

    Maybe it's time to break out the ol' duck tape and wrap the housing up.
  4. lawnMaster5000

    lawnMaster5000 LawnSite Senior Member
    Messages: 591

    I was not so lcuky, i had the same problem of air going around the air filter, with only 366 hours on the mower i just had to replace the engine. The engine is covered under warantee but they say its my fault the air filter is not working properly. ("i didnt keep it clean") -- I even brought it into the shop once b/c i thought to much crap was building up in the carb.

    nice $1,200 expense:(

    i am going to try and find a different filter setup for this new engine (that i dont have yet)
  5. Jman

    Jman LawnSite Member
    Messages: 217

    Were is that seal located? Is it between the aluminum adapter and the top of the carb? Was it originally a gasket? Let me know if you could I am interested in that.
  6. Richard Martin

    Richard Martin LawnSite Fanatic
    Messages: 14,699


    My DC did not come with any kind of seal in the area I mentioned. Let me better describe where the seal doesn't exist on my DC.

    First you have the Turbinator, then a black hose connects that to the large cannister filter, then another black hose with a 90 degree bend connects that to the aluminum Kohler air cleaner housing. The Kohler air cleaner housing sits on top of a round aluminum plate that attaches to the carb. There is no seal where the Kohler housing meets the round aluminum plate and this is where the dust was leaking in. I will post a pic later of the whole arrangement.
  7. paul

    paul Lawnsite Addict
    Messages: 1,625

    Is this what your talking about? [​IMG]
  8. Richard Martin

    Richard Martin LawnSite Fanatic
    Messages: 14,699


    This is what I'm talking about...

    This is with the air cleaner put together.

    <img src="http://members.aol.com/richardmartin/cleaner1.jpg">

    This is with the cover removed. The screwdriver is holding up the rubber seal that I made.

    <img src="http://members.aol.com/richardmartin/cleaner2.jpg">
  9. Nick

    Nick Banned
    Messages: 180

    I just noticed the same thing on mine today. It started to stall when I was going through dusty areas and then I tightened the screw that holds the filter in place and that solved the problem. But I like your idea, it should keep the thing from loosening up and seal it much better
  10. John DiMartino

    John DiMartino LawnSite Silver Member
    Messages: 2,555

    Thanks for the info Richard,between the drought,and the leaves here,it is literally a dust bowl,even on thich lawns this year.Im afradi to look at mine after reading your post.I opened it up,just to check in the spring,and the kohler filter was mint,and the donaldson was like new,it only had 175 hrs on it then,but I had done qiute a few dusty leaf clean ups.

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