Prop question /for a friend

[Cool It]

Hey guys <br /><br />need to ask a question for a friend of mine. his rpm are running to low at wot so the first thing we want to think about is the prop. the question is he has dual props -- does that make a difference in the selection of the pitch. when I look at the charts etc for proper prop selection it does not talk about dual props.<br /><br />Thanks<br />COOL IT

 

[Don S]

Re: Prop question /for a friend

What are we talking about here, Mercruiser or Volvo?<br />Dual props come in matched sets for either.<br />Did this low rpm probem just happen, or is it a new boat that has never been right. <br />What rpm is he now getting, and what engine setup does he have?

 

[Cool It]

Re: Prop question /for a friend

Thanks for the quick reply<br /><br />he has a 2001 searay bow rider 24 ' with a mercruiser 5.0 I think a bravo not sure. he bought it this season seemed to run fine, but he did not relize that he was not in the rpm range of what should be 44-4800. he is only about 35-3600 at wot. I am not sure what pitch props he has now I still need to get that info from him

 

[Bondo]

Re: Prop question /for a friend

Does this boat sit at a Dock, or on a Mooring ???<br /><br />Before I dropped that much coin for a set of Props,......<br />I'd Make Sure the bottom of the boat isn't what's holding it back.........<br />How much sea life is hitch hiking a Free Ride ???<br /><br />If that's Not the problem,..... <br />A Full Tune Up, along with a Compression,+ Leak-down Test will give a pretty good indication of the over-all condition of the Power Plant..............

 

[SeattleMatt]

Re: Prop question /for a friend

Yeah, Bondo is right, the first thing you should do is figure out where your power went.

 

[QC]

Re: Prop question /for a friend

I would verify that tach too . . . Especially if it is on a trailer most of the time. From what I can tell he doesn't know what the RPM was when new, so there is no confirmed loss of power.