Did it actually have an in-line filter when it left the Briggs factory? If so, I withdraw my objection. This is the first I have heard of it, on a gravity feed Briggs though. Replacing it with one the same as the original, at the same point in the fuel line, should be a good solution.
Edit: I've now found an old gravity feed B&S engine that uses a filter, and the filter looks very much like the one igor54 pointed to. The gravity feed and pump feed models have different in-line filters.
Last edited by grumpy; 02/05/11 11:59 AM. Reason: Add information