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  1. #1
    New Member
    Join Date
    Apr 2013
    Posts
    4
    Location
    Red deer,Alberta
    Tractor
    Belarus 420

    Default Belarus 420 fuel issue

    I have a 1979 Belarus 420 that will run for 10 - 15 mins then stops.I have to go thru the primer routine and it starts right away and does the same thing.It seems like i load the fuel pump and when its pumped out it quits.Theres fuel past the filters to the primer pump.Im sure there are no leaks.The primer pump and boast pump are in the same housing.

    I know its an old tractor but i inheritted it and has done my father well.Im really lost here.Any ideas would be greatly apreciated.
    Thaks B

  2. #2
    Platinum Member
    Join Date
    Apr 2011
    Posts
    741
    Tractor
    cx70,5510,4630,5005

    Default Re: Belarus 420 fuel issue

    it is not getting enough fuel needs a new fuel filter or the lines have trash in them.

  3. #3
    Silver Member BelarusBulldog's Avatar
    Join Date
    Aug 2011
    Posts
    126
    Location
    The ROCK! NL. Canada
    Tractor
    Belarus 562 / Bobcat CT122 / Kubota BX1860 / Honda HT4213

    Default Re: Belarus 420 fuel issue

    Quote Originally Posted by Belarus420 View Post
    I have a 1979 Belarus 420 that will run for 10 - 15 mins then stops.I have to go thru the primer routine and it starts right away and does the same thing.It seems like i load the fuel pump and when its pumped out it quits.Theres fuel past the filters to the primer pump.Im sure there are no leaks.The primer pump and boast pump are in the same housing.
    Thaks B
    Disconnect the fuel line from the filter and using compressed air, blow back the lines. Clean your filter, reconnect everything, prime and bleed the system and you should be good to go. Do you have an owners manual for this tractor?
    Plowing, it's snow much fun!

  4. #4
    New Member
    Join Date
    Apr 2013
    Posts
    4
    Location
    Red deer,Alberta
    Tractor
    Belarus 420

    Default Re: Belarus 420 fuel issue

    Hey guys thanks for the help.I did that first thing and changed fuel filter Belarus bulldog and same thing.I figured it out and i ordered the booster pump today,should be here next thursday.Yes i do have an owners manual as well.Thanks again fellas

  5. #5
    Gold Member rdbigfarmboy's Avatar
    Join Date
    Jan 2005
    Posts
    418
    Location
    Collinwood, TN
    Tractor
    MF, Same,Zetor

    Default Re: Belarus 420 fuel issue

    Its the lines and fittings jypically not the pump. It sucks air thru a small hole in the line or loose fitting and then quits. After it sets the fuel pushes the tiny amount of air out and it will start.
    Replace all the hard plastic or braided fuel lines.

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