Outboard help

[red342]

Hello:

As stated in my other posts I am looking for a V20 this year. I do notice some come up for sale with no power. SO I began looking at OB's to see pricing, and really just for fun. I notice there are 20" and 25" motors. Is there one that is to be used with the V20, or is it preference, and whats the difference?

Thanks

Rob