Works better with a right handed thread on the set bolt. Just a guess. Shouldn’t matter with the drive pin restricting rotation.
Rotation direction is kinda arbitrary. Props are made in both left and right as can be seen on dual drive boats.
I think the reason we mainly see right props is because most are made for the outboard market which went for a right hand drive. This might be because of the mechanical architecture of an outboard engine.
Maybe, a prop spinning prop will always put a torque on a boat. Pulling the nose one way and the tail the other way. Maybe FR/Lift figured out the most people naturally apply a torque on a board. They choose the rotation to balance the torque.
You will notice on a small boat they always put the driver on the right side of the boat. If you put the driver on the left side with no passengers the boat tilts to the left on acceleration.
IMHO, a prop turning left creates a self tightening moment on its bolt tightening clockwise.
That’s what I meant. “Works better”.
I like my theory. Maybe FR will chime in and set us straight.
Hello,
Yes, you have all right…
Automatic tighting screw
Beter fea0ling when you riding becuse its more naturl in your feet of you have force in left speening
Oups i am goofy…
Turn around the other way! 
Hey @Flying_Rodeo, Were you going to do another run of props for flipsky motor? I’m down for one!
Same! Also keen for one
I’d take 5! Pretty please!
Missed two or three batches up to now. 
He told me through facebook that he will not make them in the “near future“. 
Not sure how far out that puts them.
That’s what he told me too… 
Maybe try to make a good prop your self? For the flipsky motor this is a good basis:
#Aliexpress € 8,01 23%OFF | 2HP 7 1/4X5 EEN Motor Onderdelen Boot Propeller Vervanging Buitenboordmotor Gemakkelijk Installeren Schip Praktische Marine Aluminium Legering Voor yamaha
https://a.aliexpress.com/_d8oCtHr
I make it with a grinder, filing and drill out the hole with my lathe. I use some tape to see if the blades are the same shap. I have no problems with vibrations so all blades have (almost) same shape and mass.
What was your goal ?
My goal was to make a cheap efficient prop with enough force to give me some good speed. And I am happy with the performance.
Nice job on the modification! Have You compared the rpm / speed on the original vs modified prop? A wild guess would be that the modified needs less torque from the engine to spin a given rpm as the blade surface is less?
Yes, it is a huge difference. I don’t have the exact numbers but at 14s unmodified it was some where around 2800rpm and modified 4900rpm so yes a huge difference.
