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#40405
amuller
Participant

    I have often seen that an unknown filter or screen gets missed. Sometimes there is one in the inlet fitting of the pump, though I don’t know about Mikuni. Sometimes a metal screen look superficially OK but is blocked by corrosion. Have you undone all the hoses and checked for a swollen or kinked inner tube? Can you borrow and try a different hose/bulb assembly?