In other words, stop running the bike, fix the petcock and whatever else, drain 
the oil, put in fresh and new filter, before running it again. 
 
 




________________________________
From: Gene Henry <[email protected]>
To: [email protected]
Sent: Sat, August 14, 2010 8:22:30 PM
Subject: Re: [Nighthawk Lovers] Shut-off petcock allows fuel into 
crankcase????????????


Totally makes sense!  
----- Original Message ----- 
>From: Allen Thomas 
>To: [email protected] 
>Sent: Saturday, August 14, 2010 6:04 PM
>Subject: Re: [Nighthawk Lovers] Shut-off petcock allows fuel into 
>crankcase????????????
>
>
>Gene, I was thinking about this; I agree that it is highly improbable that the 
>needle valves would rot to the extent that fuel would bypass them to such 
>a great extent. Here is another more plausable scenario. the torn diaphragm in 
>the petcock could allow fuel to pass it and drain straight down the vacuume 
>line 
>directly into the #2 intake runner, bypassing the carb all together. this 
>would 
>fill the cylinder, and fuel would eventually drain past the rings into the 
>crank 
>case. If you started the bike in this condition it could hydrolock the engine. 
>Even a little gas in the oil will destroy its viscosity, and prematurely wear 
>the berrings and transmission gears. The reason I made such a strong warning 
>is 
>that I think this is a new member, and he may not be aware that this condition 
>could occur. I'd hate to see another new member loose his bike prior to 
>getting 
>it on the road. Let me know your thoughts.             
>
>
>On Sat, Aug 14, 2010 at 6:03 PM, Gene Henry <[email protected]> wrote:
>
>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   -- 
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