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Boss/ Cobrajet Rebuild Kit
  • Boss/ Cobrajet Rebuild Kit


    This kit includes the parts needed to rebuild your Boss/Cobrajet carburetor. These are the exact parts that are used in a Air Fuel Spark restoration. 

    This kit is appropriate for any Cobrajet and Boss carbs.

    Any of the 68-69-70 Cobrajet 735s as well as Boss429 735s and Boss302 780cfm carbs.


    Examples:List 4174, 4168, 4129, 4279, 4280, 4456, 4609, 4345, 4511, 4627, 4628, 4647, 4513, 4514, 4515, 4516, 4653


    This Kit Contains:

    Amount    Part Description    

    2      .110 Needle/Seat One needle and seat for each bowl

    1    6.5 Power Valve correct power valve for each metering block

    2          Gasket Metering Block Nonstick gasket used between main body and metering block

    2    Gasket Fuel Bowl Nonstick gasket used between fuel bowl and metering block

    8    Gasket Fuel bowl screw each bowl screw requires one of these

    1    Diaphragm, accelerator pump pump diaphragm

    1    Gasket, 1 11/16 Throttle body throttle body gasket for between baseplate and 

                main body

    1    Diaphragm, Vacuum Secondary correct length secondary diaphragm

    2    Gasket VS Pot or Choke1 of these are used between vacuum housing and main body, 

                one is for choke seal

    2    Gasket, Accelerator pump nozzle    1 for each nozzle screw, and 1 under each nozzle

    2    Bowl sight plugs    new fuel level sight plugs

    2    Bowl sight plug seals    gasket seals for the above

    2    Idle Mixture screw new idle mixture screw, CJ style for limiter caps

    6    Metering block well plug. If you removed the idle well plug to clean the idle well,  

                this is a new plug to seal it

    2    Gasket needle and seat adjuster. Gasket between the fuel bowl and needle adjuster

    2    Gasket needle and seat locknut. Gasket for the locknut

    2    Cork seals for mixture screw    new extra thick cork mixture screw seal

    1    Gasket, Power valve    correct gasket for the power valve included

    1    Gasket, choke cap for between choke cap and choke casting

    3    Seal, fuel inlet    bonded rubber/aluminum seal for fuel inlets

    2    Locknut, Needle/Seat    new locknut

    2    Adjuster, Needle/Seat new adjuster

    2    choke plate screw. new screws as the old ones are typically damaged on removal

    1    black vent seal. Correct vent lever seal, use a drop of oil for install

    1    Baseplate gasket. my favorite 4 hole gaskets for between carburetor and intake  


    1    Air Cleaner Gasket    Extra thick gasket for between air cleaner and carburetor. 

    1    Cotter pin    retains secondary closing link

    1    hairpin clip for choke rod retains choke rod to choke housing

    1    E clip 1/4inch    to retain accelerator pump lever

    1    E clip 3/16    e clip to retain secondary diaphragm rod to secondary shaft

    8    Brass screw throttle plates    Brand new throttle plate screws.  Self binding style  

                screws, blue loctite is still advised


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