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

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ONAN 4000 RUNS FOR ONE HOUR AND DIES--ANY IDEAS WHY?

MY ONAN 4000-RUNS FOR ONE HOUR AND DIES--ANY IDEAS WHY?

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Try to restart to see what happens. However, make sure to have a volt meter to check output voltage. You may be loosing voltage and therefore it shuts down. Check oil pressure switch, rings, brushes. Replace brushes if they are less than 1/2" short and clean rings with emory cloth until copper is noticable.

Posted on May 10, 2009

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ONAN 4000 RUNS FOR ONE HOUR AND DIES--ANY IDEAS WHY?


does it have original oil in it? if so they use a lighter weight oil than recommended for engine break in. change your oil and filter and see if that doesnt solve it.could be thinning out loosing pressure when hot. i have seen this beofore.. :)

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