Changing to 4-bladed props (310 Sundancer)

[Grec]

I have a 2001 310 Sundancer with twin horizon 357 inboards and V-drives. I'm considering replacing my 3-bladed 16 x 15 props for 4-bladed props to get better docking control. The local prop shop suggested 16 x 14 4-bladed props, but they seem extremely difficult to find with a 1.5" bore. I'm curious if this is the right 4-bladed prop to replace the original 3-bladed ones, and whether people who made that change had difficulty finding them.

 

[Golfman25]

So going from memory (my numbers on my boat) but adding the blade requires you to drop the pitch by 1-2 to maintain RPMs. So you're in the right range. Can't the prop shop find them for you?

 

[dvx216]

Give Deep Blue Yacht supplies a call at

• 1-800-454-6960 they bore pitch and cup the prop before selling them. Also give Mindermans Marine in Port Clinton Oh. call at 419-732-2626 Minderman's was really helpful when I bought 4 blade props for my 2001 340Da with 8.1s

 

[Grec]

Thanks for the responses. The local prop shop guy asked me to give him a few days to look for a used pair. If he didn't find any, he'd quote me new ones instead. I just asked here because I went on line, just to see what they are going for, and realized that that exact combination doesn't seem to be common.

 

[dwna1a]

BlackDog Props in MD did me very well

 

[Grec]

I'm trying to understand the measurements used when defining the cup on a prop. I found a 2016 post from someone here named ArtWallach, with the same model boat (2001 310 with 350 V-Drives) who said he switched to 4-bladed 16 x 14 props with a "#3" cup and was happy with the performance.

But when I look on line, the references I see for cup options on this size/configuration prop are listed as ".000, .030, .045, .075, or .105". How would those measurments relate to the "#3" he referenced?