My Lund Rebel Sport with a 75hp Mercury 4 stroke is producing 38mph(gps) at 5700rpm to 5800rpm with the original 17" pitch aluminum prop and only two people and no extra gear in the boat,and an empty live well.There will often be a third person in the boat as well as fishing gear.I want a spare prop anyways,so I am thinking of buying a Vengeance 16" pitch stainless prop to use on the boat,and keep the aluminum as a spare.
I see adds claiming that Quicksilver and Vengeance props are the same product even though the price on the Quicksilver is much lower.Are they really the same?

From what I know is that quicksilver is mercury's "off" brand. It is available at fleet farm and other outlets. It is the exactly the same product, only in different packaging.

Quicksilver has all the same demenisons and blade shape as the mercury vengence prop , there is one big diffenerence between the two, he mecury has PVS venting system. The quicksilver is not vented. But what we do is sell the quicksilver for quite a bit less than the mercury and drill in the PVS hole so you can ajust the vent hole if you what. Any decent prop shop could put the PVS vent into your prop. For example we charge $15 plus the plugs that you what there they run around $1.50 a piece.

What does this PVS venting do for a prop??

I have read up on PVS online,and it appears that the difference in performance is small,and only the holeshot is effected.As such,I am going with the Quicksilver.

Thanks to propmann for informing me that there is a flo torq III hub for using stainless props on 4 stroke engines.After hearing about this,I did some research online and am glad that I did.I was totally unaware of the issue with the 4 stroke rattle at idle,and that there was a cure.I now have a Quicksilver prop and flo torq III on order for 1/2 the price that we pay for a vengeance prop here in Canada.