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Vapor lines
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Karzapart55
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Joined: May 26, 2004
Posts: 640
Location: Old Bridge NJ
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PostPosted: Sat Oct 29, 2011 3:05 am    Post subject: Vapor lines Reply with quote

My 72 Bus occasionaly smells like gas. Im running a 1.7 with centermount webber progressive. Can i simply duct it into the air filter base plate. and would i have to adjust the fuel mixture? Thanks
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busdaddy
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Joined: February 12, 2004
Posts: 51057
Location: Surrey B.C. Canada, but thinking of Ukraine
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PostPosted: Sat Oct 29, 2011 7:04 am    Post subject: Reply with quote

#1 yes and #2 no.
But make sure the lines above the tank as well as the elbow behind the sender are good and the filler tube isn't leaking.
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Tuna Tim
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Joined: November 24, 2005
Posts: 181
Location: Saddlerock, Aurora, Colorado
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PostPosted: Sat Oct 29, 2011 8:12 am    Post subject: Reply with quote

What you are proposing to do is an improvement, but you will most probably still smell some gas fumes, as the fuel vapor will expand and escape the confines of your air filter when the motor is off. The charcoal canister does a much better job trapping the vapors when the motor is off. The fuel is later evacuated from the canister when the motor is running.

In your righteous quest to eliminate gas fumes, you may also want to ensure that the bus is employing a non vented gas cap.
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