Matt Tritt was suffering from fuel odor in the coach and found the problem was the hoses that connect the fuel filler and vent tube to the down pipe to the tank. This is on the rear tank with a single 50 gallon tank but is probably the same for the rear tank if you have the dual tanks.
To access the area, you need to remove the toilet which is its own challenge. See this post for more info on that - viewtopic.php?f=4&t=170
The real fix for this requires removing the platform that the toilet sits on but this is not so easy. Below are pictures of what Matt did to get access to the clamps on these hoses.
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access_hole.jpg [ 80.68 KiB | Viewed 13608 times ] |
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toilet_platform.jpg [ 94.32 KiB | Viewed 13608 times ] |