[trummis1]

Hallo
I need a new steel-prop to my Talari 211 1998 5,7 l. Alpha one ( i´t has to low RPM 4200)
What type do I have ???
Jacob
Denmark

[mikeyt]

hello Jacob

What prop do you have on the boat now? If your rpms at 'wide open throttle' are low it usually means you are over-pitched. ie....if you have a 21" pitch prop then drop to a 19" pitch prop. That will increase your WOT rpms by about 4-500 and should put you right in the acceptable range for your motor.

[trummis1]

Originally Posted by mikeyt

hello Jacob

What prop do you have on the boat now? If your rpms at 'wide open throttle' are low it usually means you are over-pitched. ie....if you have a 21" pitch prop then drop to a 19" pitch prop. That will increase your WOT rpms by about 4-500 and should put you right in the acceptable range for your motor.

Hallo Mikeyt
Do you now the type of the original prop.??
Jacob

[mikeyt]

I'm not sure what prop would have originally been supplied with your boat. Perhaps someone else here with a similar model can answer that one.

I believe the recommended WOT rpm range is 4200 - 4600 for your 5.7L. If you are running at 4200 rpm now, i'm guessing you have a 21" pitch which means you could likely drop to a 19" pitch (400 rpm increase with the change) and get a slight performance improvement.