5008181 EVINRUDE VALVE Assy, Cooling pressure relief Exhaust emissions related part

Cold Mode Operation
The 3176 system automatically idles the engine at 1000 rpm for the correct warm up time after a cold engine start [approximately less than 40°F (5°C)]. The 3176 system periodically checks the engine coolant temperature sensor and will reduce the idle speed to programmed low idle speed when the engine is warm enough to drive the truck.The time needed for the engine to reach the normal mode of operation is usually less than the time taken for a walk-around-inspection of the vehicle.
A truck equipped with a 3176 Engine should not be driven until it is out of the cold mode. If the engine speed is not controlled by the PTO governor function while in the cold mode, the engine idle will be reducedto programmed low idle automatically when the cold mode is completed.
After the engine is started and the cold mode operation is completed, the truck can be operated at low speed and low power. The engine will reach normal operating temperature faster when driven at low speed and low power demand than when idled at no load. Typically the engine should be up to operating temperature by just driving through the yard toward the open road.Engine Operation
* Begin operating the engine at low load. After normal oil pressure is reached and the temperature gauge begins to move, the engine may be operated at full load.* To get the vehicle in motion, use a gear that will result in a smooth, easy start without increasing engine speed above low idle or slipping the clutch. Engage the clutch smoothly. Abrupt or jerky starts put excessive stress on the drive train and waste fuel. It is not necessary to advance the throttle to get the 3176 equipped truck moving from a stop in most instances.* Use progressive shifting to reduce fuel consumption. Progressive shifting is using only enough engine rpm required to make an upshift into the next gear. (The amount of engine rpm required to make an upshift increases as the truck speed increases, unless upshifts are made on upgrades.) Experience with your truck will show you how much engine rpm is required to make upshifts under various conditions. Your 3176 engine may be programmed for Low and High Gears RPM Limiting (progressive shift control).* If the truck can be operated in a higher gear after the desired speed is reached, select the highest gear available that will pull the load. By following this recommendation, you will lower your fuel costs. Your engine will be operating at the lowest rpm required to pull the load. Your 3176 engine may be programmed so that vehicle speed limit cannot be achieved in less than high gear.Uphill Operation
On upgrades, begin downshifting when the engine rpm starts to approach peak torque (1100-1300 rpm) speed. Fuel economy will be best if you let the engine lug back to around this speed before you downshift. Downshift until a gear is reached in which the engine will pull the load. Allowing the engine to lug below peak torque is permissible if the truck is cresting the top of a hill without downshifting.Downhill Operation
Do NOT allow the engine rpm to exceed 2300 rpm, engine damage can result.
* When operating the vehicle downhill, do not coast or put the transmission in NEUTRAL.* Select the correct gear that does not allow the engine speed (rpm) to exceed the limits above and use the engine retarder and/or brakes to limit the speed of the truck.* A simple rule to follow is to select the same gear that would be required to go up the hill. However, DO NOT allow the engine to overspeed.For more information on economical operation of this engine, refer to form LEDT5092, Driving Techniques for Maximum Fuel Economy.Programmable Features
The 3176 has the programmable features of cruise control, PTO governing, vehicle speed limiting, high gears rpm limiting, low gears rpm limiting, TEL rpm limiting, idle shutdown timer and retarder coast/latch included in its functions.Cruise Control
Typical InstallationCruise control reduces driver fatigue and improves vehicle ride by eliminating throttle bounce. Cruise control can also reduce fuel consumption and driver to driver variations in a large fleet.* Vehicle speed MUST be ABOVE the low cruise control speed limit [typically 30 mph (48 km/h)].* Set the ON/OFF switch to the ON position.* Accelerate vehicle to desired speed.* Move the SET/RESUME switch momentarily into the SET position. The engine will maintain the speed that the truck is traveling when the SET switch is released. If the SET switch is held for more than one second, the truck speed will continue to increase until the SET switch is released. The cruise speed will then be set to the speed the truck is traveling when the SET switch is released.* Move the ON/OFF switch to the OFF position, or ...* Depress the clutch pedal, or ...* Depress the service brake pedal.* Return the ON/OFF switch to the ON position, and/or ...* Move the SET/RESUME switch momentarily into the RESUME position. The 3176 system remembers the last cruise control set speed as long as the engine is running.If the RESUME switch is held for more than one second, the 3176 will decrease the truck speed and a new set speed will be established when the RESUME switch is released.The throttle can be used to exceed the cruise control set speed, if the high cruise limit is lower than the vehicle speed limit. Releasing the throttle will return the truck to the previous cruise speed. The throttle override can be used to anticipate hills or for passing situations.To shift gears, the ON/OFF switch can be moved to the OFF position or disengage the clutch to deactivate the cruise control.After shifting gears, the cruise control can be reactivated by moving the ON/OFF switch to the ON position and/or momentarily setting the SET/RESUME switch in the RESUME position. The 3176 system may have a maximum cruise speed which has been specified by the owner of the truck. The cruise control will only function between the programmed Low