Results 1 to 3 of 3

Thread: Zenith Carburetor Replacement Hardware

  1. #1

    Default Zenith Carburetor Replacement Hardware

    Does anyone know what the specs are for the idle speed screw on a Zenith 36IV carburetor? During some test drives, the screw backed itself out.

  2. #2
    Join Date
    Jul 2020


    The Workshop manual does not list an initial setting for the screw but I would screw it right in and then back it off about 1 1/2 turns & then finally adjust to give a smooth idle as per the workshop manual when engine is hot. If I remember correctly the screw should have a lock nut on it to prevent it from vibrating out . Early carbs. had a spring between the screw head and carb body but this was later changed to the lock nut , so there was certainly an issue with it coming loose.

  3. #3


    'The specs' for adjusting it or replacing it? [Like thread size, etc.] To keep it from backing out again you might try s small spot of blue Loctite on the threads. Another ?: is your "ZENITH" a real ZENITH or the far-East knockoff? (The real 1 says ZENITH on the side of the float chamber, and the difference is a polar opposite!!!) As in the real item vs. garbage. (As in 'garbagerator')

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
About us
Unparalleled product knowledge. Our mission is to support all original Land Rover models no longer supported by your local Land Rover franchise. We offer the entire range of Land Rover Genuine Parts direct from Land Rover UK, as well as publish North America's largest Land Rover publication, Rovers Magazine.
Join us