Mercury - Z-Series Stainless Steel Propeller - 4-Blade Forward - 3-Blade Rear - Up to 550 HP - 48-8M8021640 Original equipment for Zeus pod drives up to 550 HP. A large diameter 4-blade forward propeller and a smaller diameter 3 blade aft propeller provides outstanding acceleration and boat control. These props come in a tough matte finish. The Mercury Z-Series stainless steel propeller fits Mercury outboard models up to 550 HP.