Mercury 250xb and 250 sx what's the difference between the two

[Nightrain]

New to the forum and wanted to know what are the major differences between the two motors thx

[XstreamVking]

XB EFI motor XS direct injected motor. Major diff is fuel consumption and fuel delivery system. XB sucks fuel. XS sips it. Both very strong motors.

[Nightrain]

Hey thanks for your response
I am looking at a boat with an xb motor and not sure what it was didn't see many of them
again very new to the go fast outboard scene trying to all I can

[JPEROG]

Hey thanks for your response
I am looking at a boat with an xb motor and not sure what it was didn't see many of them
again very new to the go fast outboard scene trying to all I can

The XB platform is also a great candidate to extract extra power from. A little compression, reeds, exhaust relief, and flash will pull 300 and be a really strong performer. As stated above by Xstream, the downside is that they like fuel a lot.

Joe

[JasonRS]

Fwiw, the xb is a sweet sounding machine!

[XstreamVking]

XB motors are getting kinda rare now....I don't guess there were very many made.

[Nightrain]

Thanks all for your response
how about the lower units
gear ratios

[XstreamVking]

Lowers are inter changable, Both are 3.0 liter motors. Either low water pickup performance types with 1.63 or 1.75 gear sets and fat shafts or, a stock type with reg pickups with 1.75 small shaft.

[Nightrain]

And again just learning all the types of motors available want to make it enjoyable and not a money pit

[XstreamVking]

Oh, it's gonna be a money pit..........NO matter what kind of motor you have.

[Nightrain]

So that's why this site is called screamandfly
you scream to the bank and the money flys out of your hands