Prop size for 1995 SeaRay Sundance 290

[BSlice]

Hi all, apologies for not having full info requested but my boat isn’t available to collect it all at the moment. Hopefully this is enough to go on:

boat: 29’ searay sundancer 290 (8,500lbs based on google search)
enginges: twin 95 mercruiser 4.3
Outdrives: think alpha1 (def not bravo 3s)
Current props: 14.5x19 (port and starboard are pitched in the opposite direction)
RPMS @wot: 3,500-3,700

issue: low power/ trouble getting on plane

Based on my research I think a 14.5x16 should bring me to the 4400 rpm range, but looking for confirmation/suggestion.

also can I get the current props repitched?

let me know if this is enough to go on or if more info is needed

thanks!

 

[WesNewell]

AFAIK Alpha 1's have a 1.62 GR. If that's the case you should probably be using 16P props. And you should see rpm's in the 4600 range. Th GR should be stated on the outdrives somewhere.

 

[QBhoy]

You’ve something wrong with something somewhere. Have a look round everything from water in fuel, trim, weight distribution...to engine health.