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Thread: Valve Clearance

  1. #1

    Join Date
    May 2013
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    2
    Location
    Australia
    Mower
    Rockwell

    Valve Clearance

    We have a 139cc Rockwell lawnmower, model 'WESCO R4000' series. The valves are looser than I would expect and we think tightening them will improve the engines operation, however we don't know what the valve clearance should be..would anyone know the specs or have access to a manual to tell us?

    Thanks,
    Bryan.
    (Burnie Men's Shed)

  2.  

  3. #2

    Join Date
    Aug 2012
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    822
    Location
    California
    Mower
    TMW REPAIR & THE MUSICIANS WORKSHOP RECORDING STUDIO

    Re: Valve Clearance

    Never heard of that brand of engine but if you try the Briggs standard of .004 IN and .007 EX, it should run until you get the correct specs for your engine.

  4. #3

    1,000 Post Club

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    May 2010
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    2,315
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    Illinois
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    kioti/rhino finish mower

    Re: Valve Clearance

    Quote Originally Posted by Bryan.H View Post
    We have a 139cc Rockwell lawnmower, model 'WESCO R4000' series. The valves are looser than I would expect and we think tightening them will improve the engines operation, however we don't know what the valve clearance should be..would anyone know the specs or have access to a manual to tell us?

    Thanks,
    Bryan.
    (Burnie Men's Shed)
    I checked my list of rockwell models this morning, but couldn't find your model. It could be made by another company licensed for Rockwell. Is there any other manufacturer tags on the deck other than the Rockwell.
    ILLINOIS ENGINE, BEECHER CITY, IL
    BRIGGS AND STRATTON MST (MASTER SERVICE TECHNICIAN)
    Sales and Service for Dolmar, Poulan, Briggs and Stratton, Kohler, Lauson(Tecumseh, LCT), Generac, Brute.
    Warranty service for MTD, Murray, Powerwasher, Karcher, Mcculloch, Earthwise, Earthquake, Yamaha engines, Sanborn(powermate, Kobalt), Southland, Hisun, American Sportsworks, Worx, Rockwell Tools, Great Lakes Technologies products(Wen, CZ), Efco, Snap-On pressure washers, and others.

  5. #4

    Join Date
    May 2013
    Posts
    2
    Location
    Australia
    Mower
    Rockwell

    Re: Valve Clearance

    Quote Originally Posted by ILENGINE View Post
    I checked my list of rockwell models this morning, but couldn't find your model. It could be made by another company licensed for Rockwell. Is there any other manufacturer tags on the deck other than the Rockwell.
    Thanks for your replys!

    In response to you, ILENGINE, here's the mower we are working on...

    Rockwell 139cc Petrol Lawn Mower
    APN #: 6947372501626


    *460mm (18").
    *3-in-1 catcher, side-discharge and mulcher.
    *Plastic catcher.
    *4 x swing back blades.
    *5 cutting positions.

    Model RG8072.

    61502.jpg

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