Re: 1996 Mercruiser lx 5.7 260
Yep, gotta look at the intake manifold as mentioned twice. In 1996 and 1997 Mercruiser used BOTH Vortecs and non-Vortecs. My 1997 5.7LX EFI Gen + was a Vortec. I *think* the "Gen +" is what designates a Vortec. If you go onto Doug Russell's website to their parts catalogue, and look up a 1996 5.7LX (4bbl), the illustrations are most definately NOT of a Vortec engine.