Posts: 676
Location: Twin Cities, MN | Here are the general guidelines I use per Don on BBC.
Winterize
Stabilize your fuel, run the engine under load for at least 15 minutes to get the stabilizer up through the system.
Change the gear lube
Change the fuel filter
Change water separator/filter
Inspect belt/tensioner
Grease all the pivot zerks
Check mounting/steering fastners
Check engine mounting (and jackplate) hardware torque
Check torque on mounting/steering fastners
Check steering hardware torques
Check air compressor filter (if equipped),
Determine whether water pump replacement is needed & gaskets
Inspect/test thermostats
Verify no faults with DDT or Computer Diagnostic System
Remove and inspect spark plugs (replace if needed, or perhaps based on hours/age), and if you like, add about 1 teaspoon of oil (same thing you run in the oil tank) to each spark plug opening.
Remove prop, check for fishline or hub damage, grease shaft and re-torque prop
A good, careful "visual inspection" of the entire engine.
Spin the engine "clockwise" by hand a few revolutions, reinstall the plugs- and then park the engine in the "full down position" for off-season storage.
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