1996 1400 Acts Like There Is No Reserve

It is possible u have the feed lines crossed on the bottom of tank.if the tank has ever been removed. If it uses all the gas in both position then there maybe a problem with the straw .u may be able to tap the straw in with a hammer, personally dont like glue around gas .can cause ur carbs to become clogged .thats another set of problems

Ok, you have two "straws" on the petcock... one long that goes about an inch or so up into the tank, and a short one near the bottom of the tank.

When you petcock is turn to "on" it pulls from the longer of the two straws..once the fuel gets down below the top of the straw, you have to switch to reserve to get tha last inch or so of fuel.

What has apparently happened is, the longer "on" straw has come up out of the petcock, so now its running straight into the hole the straw used to be in, allowing it to drink every last drop of fuel from the tank when in the "on" position.

You will have to take the petcock off the bottom of the tank... you should see that there is only one straw with a screen still attached to it, if you shake the tank around you might be able to get the detached straw to come to the hole and get it with some tweezers and pull it out.

Once you have it, you need to glue it back into the petcock with some type of glue that gasoline wont break down... blue or black silicone will work, but you will have to allow it to set atleast over night to dry... might try some two part apoxy if you want to speed up the process.