Re: has anybody drilled out?
If you're referring to the exhaust relief holes on the back of most motor legs, then no, no improvement will be noted. Those only spit out exhaust at idle when the gearfoot is submerged and backpressure prevents exhaust from going out the prop. Once underway, the exhaust will exit underwater out the propeller and very little, if any will come out the reliefs...
- Scott
