Racor fuel filters??

[spareparts]

the only difference between each filter is the base of the filter, teh clear plastic base does not meet coast gaurd specs for installation in an enclosed compartment on an I/O or inboard engine( or even when there is a generator aboard an outboard boat), the aluminum bottom will meet coast gaurd spec for burn resistance( just LIKE A1 fuel line verses B1), the actual filter element is designed to filter gas or premix. the racor elements do a superior job of filtering out debris and water(thanks to the aqua blocker coating on the filer element), and lead to restriction in the filter( they sell a vacuum gauge to check this). Yamaha just released a new spec on all their outboards to use a minimum spec filter of 10 micron, they list the vacuum measured resistance at no more than 4 inHG, mercury uses 2 inHG as a max. Go to http://www.parker.com/racor/gas.html
to check out their products

as far as a filter causing an engine problem, as with any filert if you let it clog up it will, but odds are the anti siphon valve was the culprit