It's for hole shot and has very little or no effect on top RPM. It ventilates the blades at slow speeds on thru-hub exhaust props. What exactly are you trying to acomplish? Contact direct if you like - dhadley50@aol.com. What boat, motor, top RPM, ect? Good luck!
Actually I was just curious. But for sake of further understanding I have a 77 Merc 1150<br />on a CV 16. Would this then improve the ability to pull a skier? ( I really have no problems, again just for more understanding).<br /><br />Thanks!!
Most likely it will help, but to what degree can only be determined by trying. Make careful notes before and start with 1/4" holes and work up to 1/2". At some point you will notice no improvement and that's where to stop.<br />Glastron Carleson CV16? Very cool boat!<br />Good luck!
Hey Guy's, I've heard about that drilling holes in the prop trick before also . But where do you start drilling at the heel or the toe of the blades.I have a 30 Hp Mariner on a 15' aluminun D/W. Looking for a better hole shot, already tried the prop pitching sequence and also have a hydro-foil.. Please no remarks on the brand of my outboard {HA,HA}<br /> Joseph in Northern Ontario
The hole is drilled in the hub of the prop near the gearcase (not the blades!) to vent some exhaust gasses at slow speeds. Might be the answer to your holeshot dilemma.
Hey Guys,<br /><br />If you look you will see that I posted that way back in April. LOL hell I don't even have the same boat anymore... But I did drill holes and was very impressed with the results. I now run a Merc Chopper that does great all by itself.<br /><br />Thanks for the follow up!! Man are you guys slow
Ok i wanna try this, since i have an extra prop i can waist. The hole in the picture looks a whole lot bigger than a 8th inch or so. Seems a bigger hole would be better, but i guess i'll start with that. Should i try angling the hole a bit in the direction the exhaust will travel?
