2008 Merc 250 pro XS questions

[miagonz85]

Hey everyone,
I'm in the market for a Merc 250 or 300 25". I found a nice fresh water 2008 Merc 250 pro xs near me but it's a 20"

1) How complicated is it to convert from 20" to 25"? Is the mid section longer? Or is it a 5" spacer?

2) Main differences between the XS and Pro XS? Going on a 23' Concept

Any input helps,
Thanks!

[nitro_rat]

The factory made a longer mid for the 25” motors. I’m not sure about the newer big motors but Bay Manufacturing makes 5” spacer kits for many motors.

[miagonz85]

So mid section is different but lower unit is the same? I assume mid sections change throughout the different manufacturing years. It seems like it'll be easier to find a 25" motor.

[vnemous]

Nitro is right, Bay makes a 5 inch kit which works fine. Last time I looked was about $600 Kit for you is #613

[Tango]

I have two 25" mids for a 250XS with single offshore rams. Come to Florence, SC and pick which one you want. They were off a boat I repowered and have been in saltwater, but in decent shape.

The bigger difference between a 20 & 25" 250XS is the rev limit. The 20" mids come with a 6250 rev limit and the 25" models have a 5800 rev limit.

[vnemous]

The XS will have the upper solid mount Exhaust adapter also.