Yamaha Outboard Manuals by Seloc 1984-2014

※ Download: Yamaha 30 hp outboard service manual

Rotate the flywheel clockwise until the timing plate is aligned to the full advance timing as specified in the Tune-up Specifications chart. Restart the motor again and finish the adjustment before 3 minutes have elapsed. Remove the cover and canister assembly. Improper routing of spark plug wires may cause powerhead performance problems.

The system is powered by the crankshaft. Spark plugs are valuable tuning tools, when interpreted correctly. First, it served as an octane booster combustion stabilizer and second, in 4-stroke engines, it served as a valve seat lubricant.

Yamaha Outboard Manuals by Seloc 1984-2014 - Perform engine Timing and Synchronization adjustments as described in this section.

Repairing My Yamaha 40hp 2 Stroke Outboard Motor
This will help keep the hub from seizing to the shaft due to corrosion which would require special tools to remove without damage to the shaft or gearcase. Connect the ohmmeter across thetwo valve leads, it should read about 2. Place a new one piece gasket on the carburetor throats and align the flame arrestor to the carburetor assemblies. Details on battery service procedures are included under Batteries in Boat Maintenance. Loosen the locknut on the throttle sensor control link and the throttle cam link joint, then disconnect the link rods from the lever ball stud. If the throttle stopper is not a specified, loosen the locking screw and adjust it to specification.