The prop on my newly aquired Yamaha 4A 1990 engine is the standard 7 1/4 x 7 B.
This prop needs replacing as it is looking worse for wear and the options are either:
7 1/4 x 5
7 1/4 x 6.5
7 1/4 x 7 (current)
as this engine will be pushing a 5.5 metre RIB I am not sure whether to go for a lower pitch prop. The current prop is crap anyway so I cant really use it as a yardstick to check performace.
Can anyone recommend from experience oh and the bugger of the smaller pitch prop is that is twice the price of the standard one at £56.00