Will someone please explain to me why the float/needle(s) in the crab(s) does not stop the flow of fuel when the engine is not running, but does when it is running? 12" of head (height of the fuel column) = about 1/2 psi. The float/needle should handle that. ????????????????????
Inquiring minds want to know. Gene ----- Original Message ----- From: Allen Thomas To: [email protected] Sent: Saturday, August 14, 2010 4:49 PM Subject: Re: [Nighthawk Lovers] Re: Digest for [email protected] - 13 Messages in 5 Topics Since you filled the tank, make sure you close the petcock when not running! otherwise you could fill the crankcase with gas, ruining your oil, and potentially destroy your engine or worse! On Sat, Aug 14, 2010 at 5:10 PM, surfswab <[email protected]> wrote: > im thinking i will pull the petcock and clean it or replace it.< Good plan. You'll probly find the diaphragm rubber torn/worn out. It keeps a fuel valve open when vacuum's applied (engine running) and closes the valve in the absence of vacuum (engine not running). If it's malfunctioning, it allows raw gas to gravity feed to the float bowls -- overflowing into the intake, cylinders, air box and crankcase, causing a real mess. Rebuild kit's about $20. New petcock about $150. Add new plugs, new oil, new air/oil filters and several hours of draining/mopping/sucking raw gas/oil from everywhere it's not supposed to be. Don't ask me how I know all this. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
