Recommended Maintenance Schedule

Recommended Scheduled Maintenance

Following the factory recommended maintenance schedule is a great way to ensure longevity for your boat. Here, we'll outline the ideal schedule for sterndrives, outboards, and inboards.

Sterndrives

While the routine and scheduled maintenance can vary from engine to engine, we've used the suggested maintenance schedule for the 4.5L Mercury Mercruiser as a good guide to follow. Much of the season to season maintenance is included with your winterization at Old Mill. If you have questions regarding your specific engine or would like to schedule maintenace, email info@oldmillmarina.ca .

Task IntervalMaintenance to be Performed
Each day start
  • Check the engine oil level
  • Check the sterndrive gear lube level
  • Check the trim pump oil level
  • Check the power-assisted steering pump or the compact hydraulic steering fluid level (depending on steering system of your model.
Every two months or 50 hours of operation
  • Check the battery connections and fluid level
  • Ensure that the gauges and the wiring connections are secure. Clean the gauges.
  • Check the fuel pump oil reservoir
  • Lubricate the engine coupler.
Every 100 hours or annually
  • Change the engine oil and filter.
  • Change the sterndrive gear lube.
  • If the condition of the spark plugs and spark plug wires was satisfactory at the initial inspection, inspect the condition of these components and replace as necessary
  • On models with closed cooling, check the coolant level and antifreeze concentration for adequate freeze protection. Correct if necessary.
  • Tighten the connection of the gimbal ring to the steering shaft to specifications.
  • Inspect the water-separating fuel filter and replace if there is debris visible.
  • Check the steering system and the remote control for loose, missing, or damaged parts. Lubricate the cables and the linkages.
  • Inspect the condition and the tension of the belt.
  • Inspect the PCV valve and replace if necessary.

    Outboards

    While the routine and scheduled maintenance can vary from engine to engine, we've used the suggested maintenance schedule for the 115HP Yamaha as a good guide to follow. Much of the season to season maintenance is included with your winterization at Old Mill. If you have questions regarding your specific engine or would like to schedule maintenace, email info@oldmillmarina.ca .


    Task IntervalMaintenance to be Performed
    Each day start
    • Ensure the telltale (pee stream) is flowing with consistent pressure
    • Use only fuel free of octane
    Every two months or 50 hours of operation
    • Inspect/replace anodes
    • Flush cooling water passage (salt water)
    • Inspect/replace fuel filter
    • Inspect fuel system
    • Inspect prop and cotter pin
    Every 100 hours or annually
    • Change gear oil
    • Change engine oil
    • Change oil filter
    • Inspect greasing points
    • Inspect/replace spark plugs
    • Inspect cowling clamp
    • Inspect idling speed
    • Inspect PCV (Pressure Control Valve)
    • Inspect power trim and tilt unit
    • Inspect shift link/shift cable
    • Inspect throttle link/throttle cable
    • Inspect/test cooling system