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Jim, although the Stiletto Advantage is a great prop, I can tell you from direct, personal experience that it is a VERY poor match for the F70. I ran an Advantage for several years on my Supersport 15 and put up with lackluster acceleration and general blah performance, primarily due to procrastination. I finally got off my duff and switched to a Power Tech SCD3 last summer and the difference is astonishing - much better acceleration and improved top speed too, and no loss of mileage.

I am not sure what pitch would be best, but if you go to the Power Tech website. find their contact info, and explain your situation, they will make a recommendation. They returned my request in less than 24 hours, in the middle of the busy summer season.

Power Tech also will replace your prop with a different pitch for a nominal fee. After getting a recommendation from Power Tech, I did buy mine through Dan's Discount Props - they do not show the SCD3 on their website, but can order any of the Power Tech line.

I am sure that the above sounds like I'm just promoting Power Tech, but I am not. I'm convinced that any prop with a lot of blade area is a bad idea for the F70, and possibly other 4-strokes that make their power at high RPMs. With the additional power needed to drive a V-hull, I would think the Advantage would be even worse on your Dauntless than it was on my classic 15.

If you want to stay with props made by PPI, the manufacturer of the now-defunct Stiletto line, you might want to try the Turbo Quest - they advertise it specifically as being good for the F70, and it seems to have the same characteristics as the SCD3 - lower blade area, low rake. The Quest is available on Amazon - isn't everything?

By the way, great choice! The F70 is an awesome motor, especially with the right prop! Good luck!

Tim