Acme 13.5 x 17.5 .105 Cup, Bore:1-1/8" it is for bottom mount

it is for bottom mount installations with offset bolt pattern

Includes all necessary mounting hardware for a quick and secure installation

The internal valve system is truly "smart" in its design of controlling you boats performance

IP Protection Class - IPX9K

for up to 4 tanks

Acme 13.5 x 17.5 .105 Cup, Bore:1-1/8" it is for bottom mountExperience the ultimate in marine performance with 4 blade propellers engineered for precision and power. All Acme propellers are designed, manufactured, and inspected directly at their U. S. based facilities to ensure the highest quality standards for boaters who demand excellence. Acmes advanced CNC process represents the most accurate method for consistently producing propellers with the correct diameter, pitch, and cup. This specialized