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Old 08-03-2016, 09:32 PM   #1
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Generator install???

Just picked up a used onan 4000. Getting ready to install in a 25WAB and noticed there are two fuel lines in the compartment. It appears that the onan only needs one. So what do I do with the other line? Also what have others done for exhaust routing?

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Old 08-03-2016, 09:39 PM   #2
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One is possibly a return ?

2015 Columbus 320RS
2008 2500HD Duramax
2015 nights camped "34"
2016 nights camped "22"

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Old 08-03-2016, 10:29 PM   #3
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The 1/4" is the fuel line and the 5/16" is the EVAP line (suction line) that goes to the vapor canister mounted next to the fuel tank. At the generator it is routed to the intake manifold.
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