Allison XB21 Prosport
Mercury Racing 300XS vs. 300XS DBR vs. 300R with multiple gear ratios
Data-driven testing of Mercury 300XS vs. 300R
**Check out Fastbass Marine at [ Ссылка ] for new and used Allison boats, marine electronics, and gear!
![](https://i.ytimg.com/vi/gzDuYAF7ihU/maxresdefault.jpg)
Allison XB21 Prosport
Mercury Racing 300XS vs. 300XS DBR vs. 300R with multiple gear ratios
Data-driven testing of Mercury 300XS vs. 300R
**Check out Fastbass Marine at [ Ссылка ] for new and used Allison boats, marine electronics, and gear!