826709117 Mercury NUT, (.500-20) Stainless Steel

5-1 Starter
5-1-1 Removal and Installation
Remove the starter from the flywheel housing.5-1-2 Disassembly
For disassembly of parts with an encircled number, see following items. 1. Do not remove the bearings on both ends of the armature unless defective.2. Note the installed direction of the lever to avoid wrong reassembly.(1) Removal of Pinion Stopper Apply a tubular tool to the pinion stopper and tap it with a hammer until the pinion stopper comes off position to the clutch side.Remove the ring and the pinion stopper. If the pinion stopper cannot be removed, deburr the groove in the pinion shaft. 5-1-3 Inspection and Correction
(1) Armature (a) Coil short circuit test Place the armature on a growler tester. Hold a piece of iron in parallel with the armature and slowly turn armature by hand. If the iron piece is attracted or vibrates, it means there is a short circuit. Replace the armature. (b) Coil earth test Check for continuity across the commutator and shaft (or core). If there is a continuity, indicating that the coil is earthed, replace the armature. (c) Inspection of commutator 1) Measure the runout of commutator with a dial gauge. If the runout exceeds the limit, correct, ensuring that the O.D. limit is not exceeded.If the commutator surface is rough developing ridge wear, correct with sandpaper (No. 300 to 500). 2) Measure the commutator O.D. If the measurement exceeds the limit, replace the armature. 3) Measure the mica depth of groov between segments. If it does not reach the limit, correct. (2) Field Coil (a) Coil open circuit test Check to ensure that there is continuity between the terminal lead and brush (+).If there is no continuity, indicating an open circuit, replace the yoke assembly. (b) Coil earth test Check to ensure that there is no continuity between the yoke and brush (+).If there is continuity indicating that the coil is earthed, check for poor insulation. If repair is impossible, replace the yoke assembly.(3) Brush and Brush Holder (a) Brush wear Measure the brush length and, if the measurement is less than the limit, replace the brush.If the brush is unevenly worn or develops rough surfaces, correct with sandpaper (No. 300 to 500). Correct the brush contact surface to a curve of the commutator. (b) Brush spring tension Measure the installed load of the brush spring. Using a new brush, read the load at the moment the spring leaves the brush.If the spring tension is below the limit, replace the spring. (c) Brush holder insulation test Check to ensure that there is no continuity between the (+) brush holder and (-) holder plate.If there is continuity, replace the brush holder. (4) Overrunning Clutch Check to ensure that the pinion shaft turns smoothly when truned in the drive direction (clockwise) and locks when turned in the opposite direction (counterclockwise).If the pinion shaft does not properly rotate, replace the overrunning clutch. (5) Magnetic Switch Perform the following continuity tests and, if any faulty condition is evident, replace the magnetic switch.(a) Coil open circuit test Check to ensure that there is a continuity across S and M terminals, and S terminal and ground.(b) Fused contact check Check to ensure that there is no continuity across B and M terminals.(c) Loose contact test Check to ensure that voltage drop across contacts is small.If a large voltage drop involves, it means that the contacts are defective.5-1-4 Reassembly
1. Ensure correct installation direction for the lever assembly.2. Be sure to align mating marks on the yoke and the center bracket. (1) To install the pinion, pass the pinion shaft through front bracket. Then, with the spring, pinion, and pinion stopper mounted and the ring fixed to the pinion shaft groove, pull the pinion or pinion stopper toward ring to fix in position. (2) Adjustment of Pinion Shaft Thrust Gap Measure the thrust gap with the following procedure and, if the measurement is out of specification, adjust by using adjusting washers.(a) With pinion removed Mount the gear onto the pinion shaft and pass the shaft through the center bracket. Then, secure the pinion shaft with a washer and snap ring.Now, move the pinion shaft in the axial direction to measure the thrust gap.(b) With pinion mounted Temporarily secure the pinion shaft and gear between the front and center brackets with attaching bolts. Then, adjust the thrust gap by moving the pinion shaft in the axial direction. At the time, leave the spring set removed: the spring set, when installed, can cause the center bracket to rise resulting in incorrect measurement of the thrust gap.5-1-5 Adjustment and Test after Reassembly
(1) Adjustment of Pinion Gap When the reassembled starter is wired as shown, the pinion comes out rotating. When the M terminal is disconnected, the pinion stops rotating, being held in the out position. Then, push the sleeve lightly back and measure the backward travel (movement), which is the pinion gap. Adjust by varying the number of packings in the magnetic switch to obtain the nominal value for the gap. To reduce the pinion gap, use a greater number of packings. (2) Test Set up a circuit as shown to check for no-load characteristics. 1. Use wires as thick as possible and tighten all terminals securely.2. The reduction gear built into the starter produces high rotating sound at no load.3. If the starter is operated for a long period, the battery will run down resulting in reduced rotating speed. Do not operate the starter for more than 10 to 15 seconds at one time.5-2 Starter Relay
(1) Check for continuity between the SW and L terminals and check to ensure that the coil resistance is up to specification.(2) Check to ensure that when the battery voltage (24V or 12V) is applied across the SW and L terminals, there is continuity between the B and S terminals.5-3 Alternator
5-3-1 Removal and Installation
1 Oil Pipe <Model with vacuum pump>2 Oil return hose <Model with vacuum pump>3 Alternator5-3-2 Disassembly
For disassembly of parts with an encircled number, see following it