prop for 20v

[joakin]

I need a new prop for my boat, I had recommended acmethe 653 and nettleprops the 911, what do you think will be best for my vessel is about 1500 / 1900lbs between sac and fat people.

i have now 515 with mercruiser 350mag 315hp

thanks in advance!

[Waterski-Rebel]

Where do you live? And do you know which gears you have?

You might also want to call ACME, they'll get you dialed in.

[chpthril]

Is the 515 the stock/original prop? It is a 13 x 12 with a .080 cup. The 653 and 911 are both 13" dia props, but the 653 has a 11.50" pitch and .060 cup and the 911 is a 10.50" pitch and.080 cup. Both would be an improvement, with the 911 giving the most. Even the 525 would be a possibility with it's 11.50" pitch. The only diff between the 525 and 653 is the cup. IMO, the higher cup of the 525 would give you a little better "bite" and less slip then the 653, as they are the same dia and pitch, just less cup on the 653.

I would say that the choice would be between the 525 and the 911 - both are 13" dia, both are .080" cups, so the main difference in them is the pitch. This is where the 911 stands out. The 911 is 1.5" less pitch ( more hole-shot) then the 515 and the 525 is only .5" less pitch. IMO, the small increase in performance doesnt out weigh the cost of the prop.

Call Acme and get thier Pro advice.

[joakin]

acme recommends the 653
nettleprops recommends the 911

this is what I answered the pesonal of acme


The cup is a uniform machined bend in the trailing edge of the propeller. .020 cup on a 1-1 gear ratio is 100 rpm. That will make for a increase of 250 rpm more on the 653 than the 515 propeller.