Wrong Prop choice or worse?

[the gaffer]

Hi, I have a Volvo Penta 5.0 GXI (270hp) on a Regal 1900, I bent a blade on the prop (a 14.5 x 19, 3 blade aluminum) so when I was looking for a new prop I was unable to test the RPM's etc as I did not have a working prop to test with. So I thought I would be safe to just go for something similar, I ordered and fitted a 4 blade Solas 14.25 x 19 and tested it at the weekend and have lost my hole shot completely,the stern bogs right down into the water and it takes for ever to get up on a plane, and that without towing anything or anyone?????? Any thoughts? I did have 2 more adults in the boat that last time, but still I was expecting similar performance. Once it eventually gets up on a plane 15-20 seconds, top end seems fine (50mph), but this is a 270hp 19 foot boat, it should be tearing ***** out of the hole, not sucking it!

Do you think I just chose the wrong prop, or is something more sinister going on??

 

[usskydvr]

Re: Wrong Prop choice or worse?

When going to a 4 blade normally you should drop the pitch down. Should have gone with a 17.