|Fido-X scrolling marquee:||
The Anti-Siphon Valve is typically located on top of your fuel tank where your fuel feed hose connects. This is a USCG required part that prevents fuel from leaking into the bilge should a fuel line fail, or gets cut below the tank level.
Common symtoms of a anti-siphon valve going bad is lower that normal top end or loss of RPM's at the upper range caused by the anti-siphon valve not opening up all the way from internal corrosion. (very common problem on 10+ year old boats)
Always use teflon tape to threads when installing.
NOTE: 3/8" hose barb x 1/4" NPT