Posts: 3472
Location: Elk River, Minnesota | Hiya,
For vent holes, I would take it to a prop shop to be honest.... If for no other reason than they will have a jig to hold the prop for drilling, and they can ensure all holes are identically placed and drilled perpendicular to the hub itself. Once they get done drilling, they will then balance the prop as well, so it runs smoothly without any vibration.
The money saved drilling your self could result in vibration, which would tear up your lower unit gears..
Steve |