Volvo Penta Propeller help needed

[Jorma]

Hi, I have a 23 ft composite cruiser which weighs approx 2000 lbs. It is fitted with a Volvo Penta 290 DP with a B5 propellers. It is very slow and i was wondering if someone could advise me if changing the props to maybe a B6 or B7 would give me more performance / speed. Would the pitch make any difference? It is used in Saltwater in the Irish sea. Thanking you in advance. Gary.

 

[Scott Danforth]

you may want to double check your weights. are you sure you dont mean 2000kg?

my 24' boat is 3500# dry or about 4400# (2000kg) wet. my 19' SeaRay was 3000# dry

What is your actual weight (per scale)? what RPM are you spinning? what is GPS speed? what motor

My 1988 vintage 271C with vortec heads and a good cam was turning B5's on a DP290 at 5000 RPM and about 46mph. I could spin B6's to about 4600 RPM and about 48mph . The B5's gave me a better hole shot

 

[Jorma]

Many thanks for the advice Scott.