Autumn and spring plan for Mercury FourStroke 25 / 30
Here's what to do when hauling out and launching. Always follow the instruction book for your engine.
Autumn
Change the engine oil and oil filterService kit 300 h (fuel filter, oil filter, spark plugs, seals, water pump kit) 8M0172124 · every 100 hours or annuallyBuy: Marinshopen ↗
Change gear oilevery 100 hours or annually
Lubricate all grease pointsevery 100 hours or annually
Check the spark plugsReplace the first time after 100 hours or one year, then as needed. · every 100 hours or annually
Check the low-pressure fuel filterevery 100 hours or annually
Run the carburettor dry or add fuel stabiliserService kit 300 h (fuel filter, oil filter, spark plugs, seals, water pump kit) 8M0172124 · Follow the manufacturer's instructions.Buy: Marinshopen ↗
Flush the engine with fresh water
Lubricate according to the lubrication schedule
Spring
Check the thermostatPerformed by a Mercury workshop. · every 100 hours or annually
Check the timing beltevery 100 hours or annually
Replace the impellerPerformed by a Mercury workshop. · every 300 hours or every 36 months
Check the gearcase oilMilky oil means there is water in the gear housing.
Check the propeller and anodes
Check that cooling water comes out of the tell-tale hole