946637 Volvo.Penta Lock nut

Procedure For Programming The Hourmeter
This procedure uses a new GSC with 0 hours as an example. The hourmeter in the new GSC will be set to a value of 1,234 hours. The value must be higher than the original value. Note: Service mode cannot be entered when the ECS is in the AUTO position. Note: Any active shutdown fault must be made inactive in order to access service mode. A FLASHING shutdown indicator means that a shutdown fault exists. To temporarily change a shutdown fault from an active shutdown fault to an inactive shutdown fault, turn the ECS to the OFF/RESET position. To permanently change a shutdown fault from an active shutdown fault to an inactive shutdown fault, the fault must not be occurring. Also, the ECS must be turned to the OFF/RESET position. If the jumper from terminal 6 to terminal 9 is not installed on the ECS, then the GSC will not power up in OFF/RESET and any active shutdown fault must be corrected before entering service mode.
Turn the ECS to the STOP position in order to shut down the engine. Enter service mode and enter the password. "OP 1" is showing on lower display. See Systems Operation, "Service Mode" for more information. See Systems Operation, "Password Entry OP3" for more information.
Press "SCROLL UP" key six times. "OP 7" is showing on the lower display.
Press "SELECT" key. The present value for the hourmeter is showing.
. Press "SELECT" key. "000000" is showing and the first digit is flashing.
Press "SCROLL RIGHT" key two times. "000000" is showing and the third digit is flashing.
Press "SCROLL UP" key. "001000" is showing and the third digit is flashing.
Press "SCROLL RIGHT" key. "001000" is showing and the fourth digit is flashing.
. Press "SCROLL UP" key two times. "001200" is showing and the fourth digit is flashing.
Press "SCROLL RIGHT" key. "001200" is showing and the fifth digit is flashing.
Press "SCROLL UP" key three times. "001230" is showing and the fifth digit is flashing.
Press "SCROLL RIGHT" key. "001230" is showing and the sixth digit is flashing.
Press "SCROLL UP" key four times. "001234" is showing and the sixth digit is flashing.
Press "ENTER" key. "001234" flashes on the lower display and "ArE YOU SUrE" is showing on the upper display.
For "yes", press "ENTER" key. "001234" stops flashing.
For "no", press "SELECT" key. "000000" is showing and the first digit is flashing. Repeat this procedure to program the hourmeter again.Note: In order to exit this procedure without saving any changes, press the exit key twice when the display shows "ArE YOU SUrE". The GSC returns to the normal display. The original value for the hourmeter is kept in the memory of the GSC. Note: Lower hours cannot be entered into the GSC if the GSC has a value that is stored. the upper display briefly shows "Error". The display then shows the original hours that are stored in the GSC and the first digit is flashing.
Press "EXIT" key. "OP 1" is showing on lower display.
Press "EXIT" key. The display returns to the normal mode. The programmed value for the hourmeter should show on the lower display as the engine data scrolls.