Best prop for my 1992 Sea Ray 240 Sundancer

[lutzinmn]

I bought my boat with a bad motor. I had a new 5.7 330hp put in. The outdrive is Alpha One Gen II. WOT for engine is 5000 rpms. The prop that came with boat is a Ballistic 345131 which is 15 inch pitch. I am only getting 4100 rpms out of this setup. It seems strange to me that I would need to drop to 11 inch pitch. Does this seem normal or is there something else I should be doing?

 

[Watermann]

I think you should have matched up 330HP with a bravo drive. What's the drives gear ratio?

 

[lakegeorge]

I would go to the Sea Ray forum and ask there. You will find many owners there with the same boat that you have and find out what they are using.

 

[Starcraft5834]

330 ponys and 4100 with a 15p...i would think youd spin that beyond rec range... not 900 short...your throttle control to engine way out of adjustment?

 

[lutzinmn]

Yes, a Bravo would be better but too expensive for now. Sea Ray forum had nothing. I will take a look at the throttle control adjustment. Thanks for the suggestions.

 

[lutzinmn]

I talked with company I bought engine from. They recommend that I change the carb. Could my carb be the problem? The engine seems to run fine and all.

 

[steelespike]

Don't assume because it's a new install that everything is right.A plug wire could be off or crossed.
As suggested throttle setting wrong,If itsc a 4 barrel do the secondaries open correctly?
what was the year and hp of the old motor? What is the gps speed at 4100?