3B7-72326-0 Tohatsu TOUCH-UP PAINT (SILVER GRAY)

An improperly calibrated control could cause an engine overspeed or other damage to the engine. To prevent possible serious injury from an overspeeding engine, read this entire procedure before starting the engine.
Start-up Adjustments
1. Complete the installation checkout procedure in Chapter 3 and the prestart menu settings in Chapter 4.2. Close the Minimum Fuel (Run/Stop) contact. Open the Failed Speed Signal Override contact. Be sure the Idle/Rated contact is in idle (open). Apply power to the control. Do NOT proceed unless the green POWER AND CPU OK indicator on the front of the control is on.3. Check the speed sensor. Minimum voltage required from the speed sensor to operate the control is 1.0 Vrms, measured at cranking speed or the lowest controlling speed. For this test, measure the voltage while cranking, with the speed sensor connected to the control. Before cranking, be sure to prevent the engine from starting. At 5% of rated speed and 1.0 Vrms, the failed speed sensing circuit function is cleared. If the red Alarm #1 indicator remains on, shut down the engine.
TO PROTECT AGAINST POSSIBLE PERSONAL INJURY, LOSS OF LIFE, and/or PROPERTY DAMAGE WHEN STARTING THE ENGINE, BE PREPARED TO MAKE AN EMERGENCY SHUTDOWN to protect against runaway or overspeed should the mechanical-hydraulic governor(s), or electric control(s), the actuator(s), fuel control(s), the driving mechanism(s), the linkage(s), or the controlled device(s) fail.
4. Start the engine. If there is insufficient fuel to start the engine, increase the Idle Fuel Limit (Menu 6). (The control will reduce fuel as required when the speed setting is reached. It requires extra fuel to accelerate the engine to idle speed.) It may take a few starts to determine the final setting of the Idle Fuel Limit. If the start time is excessive, increase the Idle Fuel Limit. If the start time is too fast or flooding is occurring, decrease the Idle Fuel Limit. We recommend trying both hot and cold starts to determine a final setting.5. Adjust for stable operation. If the engine is hunting at a rapid rate, slowly decrease the Gain (Menu 1) until performance is stable. If the engine is hunting at a slow rate, increase the Stability time. If increasing the Stability time does not stabilize the engine, it also may be necessary to slowly decrease the Gain OR to slowly decrease the Gain and increase the Compensation.This completes the start-up adjustments. We recommend saving the settings at this time by pressing the "SAVE" key on the Hand Held Programmer.Dynamic Adjustments
The objective of the dynamic adjustments is to obtain the optimum, stable engine speed response from minimum speed/load to full speed and load. All adjustments apply to both standard dynamics (Circuit Breaker Aux contact open) and auxiliary dynamics (Circuit Breaker Aux contact closed).Do the following adjustments first for standard dynamics (Circuit Breaker Aux contact open). Use Menu 1 to set the standard dynamics, if changes are needed.Then repeat the adjustments for auxiliary dynamics (Circuit Breaker Aux contact closed). Use Menu 2 to set the auxiliary dynamics, if changes are needed.1. No-Load Adjustments Do this adjustment without load applied.Slowly increase the Gain set point until the engine becomes slightly unstable, then reduce the Gain as necessary to stabilize the engine.After acceptable performance at no load, record the Actuator Output as read on Menu 7. Set the Gain Slope Breakpoint (Menu 1) to this reading.2. Minimum Load AdjustmentDo this adjustment at the minimum speed and load conditions at which the engine is operated. Be sure to select Rated Speed to switch to the Maximum Fuel Limit. Speed may be set either with the Raise and Lower commands in local control or with the 4 to 20 mA Remote Speed/Load Setting input in remote mode.Observe the movement of the actuator. If the activity of the actuator is excessive, reduce the Gain set point slightly to get the actuator movement to an acceptable level.If there is a slow periodic cycling of the engine speed above and below the speed setting, there are two possible causes:* Gain is too high and Stability is too low. Reduce the Gain by 50% (i.e., if the Gain was 0.02, reduce it to 0.01) and increase Stability slightly. Observe the movement of the actuator. Continue to increase Stability until the movement is acceptable but not excessive. A final value of Stability should be between 1.0 and 2.0 for most large engines. If the Stability value exceeds 2.0, but this procedure continues to improve performance, increase the Compensation set point 50% and repeat the procedure.* Gain is too low. If the preceding procedure does not improve the slow periodic cycling of the engine speed, the control may be limiting cycling through the low gain control region set by the Window Width set point. Increase the Gain set point to minimize the cycling. If actuator movement becomes excessive, reduce the Compensation set point until movement is acceptable. In some cases, Compensation may be reduced to zero and only the Gain and Stability adjustments used. This should be done only if necessary to eliminate excessive actuator response to misfiring or other periodic disturbances. Reduce the Window Width set point until the limit cycle amplitude is acceptable without excessive rapid actuator movement.3. Full Load AdjustmentDo these adjustments at the speed and load at which the engine is most often operated.If operation in this range is satisfactory, no further dynamic adjustments are necessary. If during changes in speed or load, excessive speed errors occur, increase the Gain Slope adjustment until engine performance is satisfactory. If excessive actuator movement again occurs, do procedure 4, then repeat procedure 3. If the settling time after a speed or load change is too long, reduce the Stability set point slightly and increase the Gain slightly. If slow-speed hunting occurs after a load or speed change but decreases or stops in time, increase the Stability set point slightly and reduce the Gain set point. See Figure 4-4.
The use of negative Gain Slope should be considered carefully. Low gain at high fuel levels will result in