Fuel Pump – Fits Mercury Marine 4-6 HP & Tohatsu Nissan 4-9.8 HP (Replaces 803529T01, 803529T02, 803529T06) family-yamaha-f25lehb and Alpha One SS (1986–1989)

and Alpha One SS (1986–1989) with serial number 0A545004 & UP

Please review the "Compatible Engine Models" table to verify your specific model and year range

Verify that the belt is properly seated on all pulleys and the tensioner moves freely

Clean Surface: Thoroughly clean the manifold mounting surface to ensure a proper seal

and other 2-stroke and 4-stroke Johnson/Evinrude models

Fuel Pump – Fits Mercury Marine 4-6 HP & Tohatsu Nissan 4-9.8 HP (Replaces 803529T01, 803529T02, 803529T06) family-yamaha-f25lehb and Alpha One SS (1986–1989)Fuel Pump Fits Mercury Marine 4 6 HP & Tohatsu Nissan 4 9. 8 HP This aftermarket fuel pump is designed for a precise fit on specific Mercury Marine 4 6 HP and Tohatsu Nissan 4 9. 8 HP 4 Stroke outboard engines. It serves as a direct replacement component, restoring reliable fuel delivery for optimal engine performance. This unit directly replaces Mercury part numbers 803529T, 803529T01, 803529T02, 803529T03, and 803529T06, as well as Tohatsu Nissan