10-15MNT Maintenance4. Install a new O-ring and the reservoir cap2, and then tighten the reservoir cap 2to the specified torque.Checking the PTT operation1. Fully tilt the outboard motor up and downa few times and check that the outboardmotor tilts up and down smoothly. Checkthe PTT fluid level if the tilt operation isnot smooth.2. Check the PTT unit for fluid leakage.Checking propeller1. Check the propeller. See “Checking thepropeller” (8-3).Adjusting the shift cable1. Disconnect the shift cable, and thenadjust it. See “Installing the shift cableand throttle cable” (3-9).Cleaning and adjusting spark plug1. Check the spark plug. See “Checking thespark plug” (7-44).Checking the timing belt1. Check the timing belt. See “Checking thetiming belt” (7-39).Replacing the timing belt1. Reduce the fuel pressure. See “Reduc-ing the fuel pressure” (6-7).2. Disconnect the quick connectors, andthen remove the high-pressure fuel hoseassembly. See steps 2–5 in “Disconnect-ing the quick connector” (6-7).3. Remove the intake silencer. See steps2–4 in “Removing the intake silencer” (6-17).4. Removing the flywheel magnet and sta-tor assembly. See “Removing the fly-wheel magnet” (7-16).5. Remove the fuel rail covers.6. Remove the wiring harness guide. Seesteps 5–29 in “Removing the wiring har-ness” (7-20).7. Remove the timing belt. See steps 6–10in “Removing the timing belt” (7-38).8. Install a new timing belt. See steps 2–10in “Installing the timing belt” (7-39).9. Install the wiring harness guide. Seesteps 13–37 in “Installing the wiring har-ness” (7-23).10. Install the fuel rail covers.11. Install the stator assembly and flywheelmagnet. See “Installing the flywheelmagnet” (7-17).12. Install the intake silencer. See “Installingthe intake silencer” (6-19).13. Install the high-pressure fuel hoseassembly, and then connect the quickconnectors. See “Connecting the quickconnector” (6-8).Checking the thermostat1. Check the thermostat. See “Checking thethermostat” (7-85).Adjusting the throttle cable1. Adjust the throttle cable. See “Installingthe shift cable and throttle cable” (3-9).Checking the top cowling1. Check the fitting by pushing the top cowl-ing. Adjust if there is free play.2. Loosen the bolts 1.Reservoir cap 2:7 N·m (0.7 kgf·m, 5.2 ft·lb)