My Duoprop props are wearing oddly, what causes that?
There are 2 known Duoprop propeller problems. (1) Boats that reside in a slip suffer from propeller corrosion problems. Many sources recommend aluminum props only in these situations. Some boaters have reported success at using stainless props by being meticulous with grounding of all metal hull components and by changing the drive and hull zincs frequently. (2) Duoprop boats suffer from blade erosion caused by cavitation bubbles traveling along the rear prop. The damage will appear as pitting near the base of the blades. This is more prevalent on boats that run at high speeds The erosion problem may be lessened by avoiding excessive trimming of the drive. Inspecting the propellers and yearly lubrication of the prop shaft is a good practice. As mentioned earlier, attention to zincs and other maintenance is well worth the investment.
