Stainless steel props

Blacky

I own a Sundeck sport SS 201. It is powered by a 260 horsepower 5.0 MPI Mercruiser. It came from the factory equipped with an aluminum Mecury Black Max 14.25 x 21 pitch prop that I recently damaged. I would like to replace this prop with a more efficient stainless steel unit. Can anyone recommend a compatible stainless steel prop?   

tantan34

I have the Vengance 19p, absolutely love it. My SD 2100 has the 5.7 EFI, I thought it was 260 hp. Was pulling a large tube with boat full of adults.

Capt_Steve

@Blacky...here's the feedback from Jeremy in Hurricane engineering: 

I would use the prop listed below if you want to try to keep the same characteristics.

PROP 14X19" SS MERC

48-16316A46

 

nquirk

@blacky.  Run it through Mercury's Prop Selector website.  http://www.mercurymarine.com/propellers/prop-selector/#

 

Blacky

Nquirk,

Thanks for the information. However, I had already researched Mercury's prop website, it is a good website, but it also suggested about eight different props. This means I would have to trail and error among those props to see which would best suit my needs. Not a very practical option considering the costs of stainless props. I was hoping some department in Hurricane engineering may have already gone through this process. 

Blacky

Tantan34,

It sounds like your Vengance prop deserves consideration, particularly on acceleration. However, what about top end? Given a light load, what is your top speed at what RPM? Keep in mind, I am running around 55 mph (by speedometer) at 4,400 rpm. This rpm is low for my 260 hp MPI, which should top out at around 4,600 to 5,000 rpm.This indicates to me my 21p Black Max prop may be over pitched. Also, I have to do some further testing with a GPS to verify the accuracy of my speedometer. I suspect it is reading on the generous side.    

Capt_Steve

@Blacky... what model year is your boat? 

Blacky

Steve,

It is a 2013, here are its specs:

2013 Sundeck Sport SS 201 I/O

Mercruiser Alpha one 1:62 drive ratio

5.0 MPI 260 Hp

 

 

 

tantan34

Easily 4600. My set up was supposedly special order from Hurricane. Apparently they didn't offer the 5.7 in that years model, and it came with the Vengance.

Blacky

tantan, Thanks for the info. Here are my latest results: I installed a new Black max prop (14.25 x 21 pitch) and went back out to the lake for some further testing. This time the results were quite different: Acceleration "good". Top speed (by GPS) 53 mph. Engine rpm @ top speed 5,000. Of course this was with one person on board and a light load. By the way, at the top end, my speedometer was off by about 3 mph--it read 56 mph. However, at the lower speeds it was spot on with my GPS. Capt_Steve/Hurricane engineers recommended a Mirage plus 14.34 x 21 pitch if I decide to go to stainless. Down the road, I will try that prop out and post the results.    

Blacky

tantan,

I need to make a correction on my last post. Capt_Steve recommended a "Mercury Vengeance Stainless Steel Prop 48-16316A46-19 pitch".  I incorrectly stated a "Mirage plus 14.34 x 21 pitch!"