Question about Harley Davidson FLSTF - FLSTFI Fat Boy Motorcycles
Your bike is equipped with a vacuum operated petcock. To check the petcock out, you must remove it from the tank. I usually use a large funnel and an empty fuel can. Loosen the petcock enough to allow the fuel to run out and use the funnel to collect the fuel in the empty can. Once the tank is empty, disconnect the fuel hose to the carb and the vacuum hose. Remove the petcock from the tank.
On the backside of the petcock, there are four small screws. Remove the screws and the diaphragm and needle in the petcock will come out. Hold the diaphragm up to the light and gently stretch it while looking for holes. If you find a hole, replace the diaphragm.
Personally, I've seen enough problems generated by these petcocks to warranty replacement with a high quality manually operated petcock. I like the Pingle petcocks. They're pricey but they WORK. I've seen too many people stranded with a whole tank of fuel and none in the carb because of these petcocks.
Posted on Sep 07, 2010
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Posted on Jan 02, 2017
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