Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Kohler Magnum question for the experts


Brettw

Recommended Posts

The new Kohler Magnum M18QS that I have just installed has the "Q" designation. Per the service bulletin the "Q" stand for quiet series. What exactly makes it a "quiet series"? Is it a better muffler? Or does this engine run at a lower WOT RPM? It does not seem to rev very high, but I am looking at a hour meter / tach for this engine. I have looked through the service manual, and although I didn't read every page in detail, I saw nothing other than the identification of the code in the beginning of the manual. Any help from the professional rebuild mechanics here would be appreciated.
Link to comment
Share on other sites

Hi, Q engines are ducted engines. The duct work covers the muffler etc and forces the hot air out the front of the tractor. It is used to meet the cooling requirement the engine manufacturer requires. It prevents heat recirculation. The duct work may reduce the noise level somewhat. If you replace a ducted engine in a unit with a regular one, be aware that you may be inviting failure if you do not address the cooling issues. Al Eden
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Who's Online (See full list)

    • Darl Swartz
    • a_sannine
    • Snojetter
    • GregB
    • mbsengineer
    • Chris727
    • simplewrench
  • Recent Status Updates

    • gwiseman

      gwiseman

      As you know SimpletrACtors.com has changed some recently. Working through this so PM me with questions, suggestions, and/or challenges you have. Appreciate your patience and feedback.
      · 0 replies
    • gwiseman

      gwiseman

      Site programming updates were made 3/23/2024. As a result some things have changed including dues payment options. We will continue maintenance and work with technicians to regain credit card payment option and clear up minor challenges. On positive it appears attaching pictures is now easier. Good day. Gene 
      · 1 reply
  • Adverts

×
×
  • Create New...