Yes fuel does return to water separator. Took the pickup hose out the tank and the brass elbow is hollow. I’m assuming if it was a anti siphon valve it would have something in it to keep the gas from freely flowing back to tank
injectors are new and all getting power just seems to me it’s not getting anough fuel on the start up prime. Read on another forum that some have a anti siphon valve at the tank
5.7 mercruiser tbi hard to start. Motor and everything on motor is new. I put a clear line from tank to fuel filter and seems like when you turn key on the pump runs the prime cycle and once it stops the fuel goes back in the tank is this correct? Once it’s started it runs fine
Yes just figured if I posed a pic someone may had had the same issue. I don’t mine taking it apart just trying to figure out exactly where the leak may be and if someone had already had the issue