3R3-83910-0 Tohatsu THROTTLE LEVER, REMOTE CONTROL

Table 1
Tools Needed Quantity
9U-6958 Magneto Test Module 1 The following components of the instrument panel can affect the output of the magneto: magnetic switch, stop switch, engine oil pressure gauge and water temperature gauge. Determine if the components are working properly. There may be a problem with an overspeed contactor or an activated overspeed contactor rather than the magneto. Also, make sure that the gas shutoff valve is OK.Use the 9U-6958 Magneto Test Module for measuring the voltage that is supplied to the spark plug by the magneto. The Operating Manual, NEHS0588 is provided with the tool.Bench testing of the magneto is performed by the manufacturer.Ignition Timing
Determine the correct ignition timing for the fuel.
Obtain a fuel analysis.
Enter the data from the fuel analysis into the Caterpillar Software Program, LEKQ6378, "Methane Number Program".
Refer to Engine Performance, LEBH9529, "G3300 Industrial", "Fuel Usage Guide" or Engine Performance, LEBX9532, "G3300 Generator Set", "Fuel Usage Guide" or consult with your Caterpillar dealer in order to determine the desired ignition timing. Timing of Magneto to Engine (Solid State Altronic)
Table 2
Tools Needed Quantity
9U-5358 Timing Light Gp 1
Turn the crankshaft in the direction of engine rotation until the No. 1 piston is coming up on the compression stroke. Refer to Testing and Adjusting, "Finding Top Center Position for No. 1 Piston". Also observe the direction that the pointer on the magneto moves. Note: The magneto has two marks that indicate the rotation of the magneto ("CW" and "CCW"). The magneto also has a pointer that moves clockwise or counterclockwise when the crankshaft is rotated. When you time the magneto to the engine, the pointer must indicate the correct timing mark.
Illustration 1 g00743172
Marks for the direction of rotation and pointer on the magneto
Illustration 2 g00735090
Flywheel timing marks
Observe the timing marks on the flywheel. Turn the crankshaft until the desired timing mark on the flywheel is directly under the pointer for the timing marks on the flywheel.
Observe the pointer on the magneto. When the desired timing mark on the flywheel is obtained, the pointer on the magneto must be aligned with the appropriate mark.If the pointer on the magneto is not aligned with the appropriate mark, remove the magneto from the engine.
Align the pointer on the magneto with the appropriate mark for the direction of rotation.
Illustration 3 g00743728
Lugs on the magneto drive tang
Pull the magneto drive away from the magneto drive housing. Align the slots of the magneto drive with the lugs on the magneto drive tang. Push the magneto drive back into the housing.
Keep the pointer on the magneto aligned with the appropriate mark and install the magneto.
Start the engine. Operate the engine at high idle speed. Note: Do not adjust the timing at low idle because of the timing advance in the magneto.
Attach a timing light to the secondary lead for the spark plug of the number 1 cylinder. Use the timing light to observe the timing marks on the flywheel. If necessary, loosen the bolts for the magneto and rotate the magneto in order to gain the desired timing. When the timing is correct, tighten the bolts for the magneto.
Install the covers for the flywheel housing. Solid State Altronic Canadial Standards Association (CSA) and ATEX Applications
The ignition harnesses for engines in potentially explosive atmospheres are protected by thick braided covers. The ignition pulses in the harnesses might not be detected by many timing lights because of the braided covers.A fabricated jumper cable will enable the timing light to detect ignition pulses. The fabricated cable is installed between the ignition harness connector and the ignition transformer of the number 1 cylinder.
Table 3
Tools Needed Quantity
Fabricated jumper cable 1
Description Part No.
Amphenol three-pin connector MS3101A-10SL-3P 1
Amphenol three-socket connector MS3101A-10SL-3S 1
16 AWG Red wire Approximately 30 cm (12 inch) 1
16 AWG Black wire Approximately 30 cm (12 inch) 1
16 AWG Green wire Approximately 30 cm (12 inch) 1
Illustration 4 g02725233
(1) Three-pin connector
(2) Three-socket connector
Assemble the materials listed in Table 2 according to the Illustration 4 schematic.
Do not disconnect equipment unless power has been disconnected or the area is known to be non-hazardous
Disconnect the ignition harness from the number 1 cylinder. Connect the fabricated jumper harness between the ignition number 1 cylinder connector and the number 1 cylinder ignition transformer.
Follow the procedure that is described above in "Timing of Magneto to Engine (Solid State Altronic)". When you perform the procedure, attach the timing light to the wiring for the fabricated jumper cable.
After the procedure is completed, stop the engine. Remove the fabricated jumper cable. Reconnect the ignition harness to the ignition transformer for the numbe