came of my duo prop 290 more then sure will be the same sizing on volvo is weird like merc and yammy etc they use like 15 ,16, 17,
for some god awful reason the use letters then number so B is alum (why not make it A) ??? and like 3,4,5,6 is all 200 rpm difference and I cant remember which way so if its a 5 a 4 isnt going to make much difference. you really have to put on boat and see what you get for hole shot and top end every boat is different.
My new package is F series?? dont ask dont know LOL we did use the one they suggested and we went down a size