Help With Prop Selection

[jopes]

I have a 88 2000sc Maxum with a 5.0/alpha one, it currently has a 14.5" / 19" pitch on it. I used http://www.turningpointpropellers.com/ prop selection guide, but it tells me the same thing for both the 5.0 which it has, and the 5.7 I am putting in it.

Either a 14.25/19 pitch for skiing and heavy loads
or
14.25/21 for speed

I live at 5000 feet elevation and I have no idea how the current prop works due to a cracked block on the boat, hence putting in the 5.7L. But, I do not want to over rev the new engine and damage it.

Any ideas?

 

[Bondo]

Re: Help With Prop Selection

Any ideas?

Ayuh,.... Finish puttin' the motor in it, 'n Try it....

 

[jopes]

Re: Help With Prop Selection

revisited.

engine is done, now I am off to doing the break in of it. when the time comes, what is the safest max rpm's to take it to when finding our max rpm's for the new prop?

 

[Bondo]

Re: Help With Prop Selection

what is the safest max rpm's to take it to when finding our max rpm's for the new prop?

Ayuh,... About 5 Grand...

 

[jopes]

Re: Help With Prop Selection

ok, were all broken in. I was hitting 4800 with a 19" pitch prop @ 4800 but did not try to see if it would go any higher. That was a Michigan 14.25x19, 3 blades and pushed me about 47/48mph.

I barrowed a co workers prop it is labeled 14.3 x21 pitch, 3 blades. It dropped my rpm's to 4500 and I am hitting 50mph.

full tank of fuel, coolers, fishing gear and 2 people. That is how it will be used 90% of the time.

GPS speed verified and the tach was checked with another tach.

currently both props push the boat right up on the water with out much effort. Would I see any benifit from switching to a 3 or 4 blade SS?

 

[Bondo]

Re: Help With Prop Selection

Would I see any benifit from switching to a 3 or 4 blade SS?

Ayuh,... Probably Not...