Question about Watts Onan Portable Generator - 4000 , Model# 5500

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Onan generator MODEL 7NHM FA 26106 F

What should be the fuel pump pressure, I have 4 psi which does'nt seem high enought.

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  • Anonymous Apr 27, 2009

    i have the same generator except a b instead of an f, my fuel pump went out and its the old rotary type ($180.00)on ebay. onan mechanic said he would replace it with a newer electric pump...from the searching i have done so far 4psi is plenty, as it only takes 2-4 psi to run a vw or almost any motor under 150 hp.....here i found a good replacement. it's 1.25-1.75 psi.....hope this helps



    http://www.pegasusautoracing.com/product...

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4psi is the correct parameter for this unit.

Posted on May 10, 2009

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