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  1. #1
    New Member
    Join Date
    Apr 2013
    Trout Lake MI
    belarus 800

    Default 70's-80's belarus 800 cylinder not firing

    I have a 70's-80's belarus 800, this is an all mechanical engine, i have a cylinder not firing, it is getting fuel, and i have switched the injectors around so the mis-firing cylinders injector is in a different cylinder, and the same cylinder is still mis-firing.. no change.. so its obviously not a bad injector, so assuming the cylinder is getting fuel (which is a pretty safe assumption), what else could be the problem? I changed the head gasket last year, did it myself, and ran like a top for a while. I have took the valve cover off and the bolts for the head off. The oil in the valve covers seems very milky and makes me think the head is bad again? not sure here.. cracked block? bad ring on that cylinder? bad head gasket again, perhaps due to improper installation or warped head? any advice/input would be greatly appreciated!

  2. #2
    Super Member Tx Jim's Avatar
    Join Date
    Jan 2007
    Coyote Flats,Tx
    JD 4255/Kubota M7040 HDC

    Default Re: 70's-80's belarus 800 cylinder not firing

    Are both rocker arms on the misfiring cyl operating & have the correct clearance? It's possible the cyl head gasket blew out.

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