Mercury 115, 135, 150, 175 Optimax Service Manual

Mercury 115, 135, 150, 175 Optimax Service Manual
Mercury Optimax Outboard Motor

115/135/150/175 OptiMax Direct Fuel Injection Starting Model Year 2000 Starting Serial Number OG960500
Inspection and Maintenance Schedule

  1. Before Each Use
  2. Check that lanyard stop switch stops the engine.
  3. Visually inspect the fuel system for deterioration or leaks.
  4. Check outboard for tightness on transom.
  5. Check steering system for binding or loose components.
  6. Visually check steering link rod fasteners for proper tightness.
  7. Check propeller blades for damage.

After Each Use

  1. Flush out the outboard cooling system if operating in salt or polluted water.
  2. Wash off all salt deposits and flush out the exhaust outlet of the propeller and gearcase with fresh water if operating in salt water.

Every 100 Hours of Use or Once yearly, Whichever occurs first

  1. Lubricate all lubrication points. Lubricate more frequently when used in salt water.
  2. Inspect and clean spark plugs.
  3. Replace water separating fuel filter
  4. Replace compressor air intake filter.
  5. Check corrosion control anodes. Check more frequently when used in salt water.
  6. Drain and replace gear case lubricant.
  7. Lubricate splines on the drive shaft.∗
  8. Check power trim fluid.
  9. Inspect battery.
  10. Check control cable adjustments.∗
  11. Remove engine deposits with Quicksilver Power Tune Engine Cleaner.
  12. Check tightness of bolts, nuts, and other fasteners.
  13. Replace water pump impeller (more often if overheating occurs or reduced waterpressure is noted).∗
  14. These items should be serviced by an authorized dealer.

Flushing Cooling System – Using Cowl Flush Plug
Flush the internal water passages of the outboard with fresh water after each use in salt,polluted or muddy water. This will help prevent a buildup of deposits from clogging theinternal water passages.

Gear Case Lubrication
When adding or changing gear case lubricant, visually check for the presence of waterin the lubricant. If water is present, it may have settled to the bottom and will drain out priorto the lubricant, or it may be mixed with the lubricant, giving it a milky colored appearance.If water is noticed, have the gear case checked by your dealer.Water in the lubricant mayresult in premature bearing failure or, in freezing temperatures, will turn to ice and damagethe gear case. Whenever you remove the fill/drain plug, examine the magnetic end for metal particles.A small amount of metal filings or fine metal particles indicates normal gear wear. An ex-cessive amount of metal filings or larger particles (chips) may indicate abnormal gearwear and should be checked by an authorized dealer.