3 blade prop to 4 blade

[myke]

i have a 97 javelin 373 fs, 18 foot,mostly used for fishing,i also use it for water skiing and tubeing, ive got a 3 blade raker ss prop 14.5x24 and a 4 blade alum 13.6x20, i would like to know wich blade is the best to use,and is the 4 blade the proper size i need?if not what size 4 blade should i use, also the 3 blade raker prop is the original prop. thank you.

 

[steelespike]

Re: 3 blade prop to 4 blade

We need to know what motor and your max rpm and speed with both props if possible.Also wouldn't hurt to know yourv typical load. A 13.6 X 20 is an odd size.Usually as pitch goes down diameter goes up.
I wonder if the 13.6 is intended for a smaller gearcase?