MERCURY HP500 EFI ENGINE
Arizona Speed and Marine has developed the “Monoblade” throttle valve that flows 1,300 CFM to match Mercury’s 525HP EFI engine. The “Monoblade” has self lubricating bronze bushings for the shaft to rotate on, stainless steel blade, and painted to match the OEM factory blue paint. Stock OEM sensors and throttle cable mounts in the original location. 25 HP gain is available with AS&M’s recalibration of the ecu and the throttle valve.
Note: Port matching to the plenum chamber is required