it's best to inspect the air filter every 100-200 hours of operation and replace it at least annually or more frequently if operating in particularly dusty or salt-laden environments
GLM 13420)
Replacement intervals depend heavily on your engine's operating conditions
Center the hydrofoil on the top side of the cavitation plate
Insert the mounting bolt through the bracket and bow stop
Water Pump Impeller Kit – Fits Mercury/Mariner 200-250 HP (Replaces 817275A5) 185-225HP it's best to inspect theProduct Details This is a complete Water Pump Impeller Kit Fits Mercury Mariner 200 250 HP (Replaces 817275A5), designed for various EFI, DFI, Carb, Pro XS, and 4 Stroke outboard engines. It provides a reliable solution for maintaining your engine's cooling system for optimal performance. It serves as a direct replacement for Mercury part numbers 817275A5, 817275Q05, 817275A6, 847275A5 and aftermarket parts from Sierra (18 3147), GLM (12098), and EMP