Had to replace a cracked fuel line in my 1999 Yard King Snowblower with 10HP Tecumseh Snow King. No big deal, remove flywheel shroud, remove plastic tank, etc. Decided to install a 90 degree fuel shut off valve, got one for $4.50 at Home Depot before Christmas original Yard King never had one from 1999. Got it all set up, fill up the tank with fresh premium (no ethanol) and start up the engine. Leaks gas from the new shut off valve . Doesn't leak when put in OFF position, leaks when ON. Are these black plastic with red turn lever things all junk? I can order from Amazon in groups of 3pc or 5pc, which suggests that a fair number are going to be defective from get go? The defective POS will be returned to HD, but the annoyance of doing the right thing (installing the shut off) is like the expression: "No good deed goes unpunished"