Prop Size 140 Suzuki

[blackfin29]

Does anyone have any thoughts on the correct prop size for a Suzuki 140 four stroke on a 20 CC. The dealer installed a 14-18....when the weather breaks we are supposed to test it, but in the mean time I was wondering if anyone had this set up.
thanks, Tom

[GC]

Is that aluminum or stainless? I have a 14x21 alum. on my 20 cc running the same engine and am pleased with it. WOT turns about 41 mph.

[JW-Tex]

http://forum.classicseacraft.com/sho...b=5&o=&fpart=1

[Mark]

I tried the 14x19 aluminum as well as the 14x21 aluminum and neither one allowed for the rpm's to get past 5200 and neither allowed for a decent hole shot. However, the stainless 14x20 that originally came with the engine works perfectly and spins right up to 6000. Initially, I wanted to find an aluminum prop that would work right as I am unfamiliar with the area and would rather hit a rock with something other than the stainless prop. Problem is, the aluminum props with my setup were just too sluggish. I suppose I could take them to a prop shop and have them tweaked to work, but I have yet to get around to that. I know other 20's that are happily spinning the aluminum props, they just haven't worked out for my setup.

[blackfin29]

S.S.