What are the pros and cons to stainless props versus the aluminum version?
The stainless prop, if it is exactly the same dimensions as the aluminum, will usually perform a little better because they are a little thinner and are more efficient as they don’t flex as much under load. A lot of the stainless props are designed for better top end than the aluminum props by having a higher rake angle and better cupping. Of course, the cost is higher, but the durability is a lot better. A concern with a lot of boaters is whether or not a stainless prop will cause drive damage if a strike occurs. If the prop hits a large rock or immovable object, then drive damage might occur. Usually the blades will bend or the hub will slip before this happens, but once in a while a shaft gets bent or gear tooth breaks. Most boat insurance will cover any of this damage above the deductible.
