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  • fuel supply issue

    have a 2004 suzuki 140 four stroke. runs great most of the time.peroidically starts dropping speed seem to be a fuel supply issue.new hose form tank to engine. could possibly be fuel pump or hoser from motor to injectors any thoughts?

  • #2
    there are many many possibilities, start by replacing all of your fuel filters from water separator to the fuel pump then check all hoses for cracking and replace as needed.

    I suspect its a bad filter somewhere restricting fuel flow but also check fuel line connections at tank and motor, sometimes they don't open correctly and let enough fuel flow especially if connected and disconnected often.


    if you need to check fuel pump operation, you can do this by letting it pump into a container and see if you get the correct flow rates. measure amount of fuel pumped for 5 minutes then multiply by 12 and this gives you fuel rate in amount per one hour.

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