826708 15 Mercruiser NUT, (.437-20)

Introduction
Most of the tests for the electrical system can be done on the engine. First, check that the insulation for the wiring is in good condition. Ensure that the wire connections and cable connections are clean and tight. Check that the battery is fully charged. If the on-engine test shows that a component is not functioning properly, remove the component from the engine for more testing.177-2330 Battery Analyzer
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177-2330 Battery Analyzer
The 177-2330 Battery Analyzer will quickly test any 6 V or 12 V battery with a 50 to 4000 Cold Cranking Amp (CCA), 65 to 5000 Cranking Amp (CA), or 6 Amp to 500 Amp Hour (A-Hr) capacity.The test can be completed in just 20 seconds and determines whether the battery is good.The 177-2330 Battery Analyzer features the following:
Quickly and accurately test the condition of 6 V and 12 V batteries (even discharged to as low as 1 V). Checks for full state charge, condition of battery, and battery voltage.
Batteries can be tested in the machine or vehicle. The battery does not have to be fully charged at the time of testing.
Saves time and money by allowing dealers to test the condition of a battery while the customer is present (works great for warranty claims).
Eliminates the need to charge and discharge a battery to test the condition of the battery.
Compensates for cold temperatures when testing batteries in extreme conditions.
Power-down feature prolongs battery life in the analyzer.271-8590 Starting/Charging Analyzer Gp
Illustration 2 g01789234 271-8590 Starting/Charging Analyzer GpThe 271-8590 Starting/Charging Analyzer Gp is a portable, hand-held tool that is used to test the condition of all 6 V, 8 V, and 12 V batteries, as well as 6 V, 8 V, 12 V, and 24 V battery packs. The tester can also be used to test the starting and the charging system. The analyzer has a multifunction input for use with multimeter probes that are an optional purchase. The analyzer also has a print function that is used with a printer that is an optional purchase.225-8266 Ammeter Tool Gp
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225-8266 Ammeter Tool Gp
The 225-8266 Ammeter Tool Gp is a portable, self-contained instrument that allows electrical current measurements to be made without breaking the circuit or without disturbing the insulation of a conductor. A digital display is on the ammeter for displaying current measurements in a range from 1 A to 1200 A. A 6V-6014 Cable can be connected between the ammeter and a digital multimeter to measure a current of less than 1 A.A lever is used to open a jaw on the meter that clamps on any conductor up to 23 mm (0.90 inch) in diameter. The jaw of the meter closes around the conductor for the current measurement. A dial is used to set the appropriate range for the amperage reading. A "HOLD" button on the meter allows the latest reading to be sustained on the display. If a measurement is taken in a limited access area, the meter will retain the measurement data that is on the display until the user clears the data. Batteries are used to power the ammeter.Note: Refer to the ammeter's User's Guide for complete information that is related to the use of the ammeter. This guide is packaged with the unit.146-4080 Digital Multimeter Gp or 257-9140 Digital Multimeter
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146-4080 Digital Multimeter Gp
The 146-4080 Digital Multimeter Gp is a portable instrument that has a digital display. This multimeter is case hardened with a rubber protector cover that provides extra protection against damage in field applications. The 146-4080 Digital Multimeter Gp can be used to perform the following measurements:
Amperage
Capacitance
Frequency
Pulse Width Modulation (PWM)
Resistance
Temperature
VoltageThe multimeter has an instant ohms indicator that permits the checking of continuity for fast circuit inspection. Temperature measurements can be taken by using the adapter for type K thermocouples. An RS-232 interface adaptor can be used to interface with other electronic tools and displays.Note: Refer to multimeter's Operator's Manual for complete information that is related to the use of the multimeter. This manual is packaged with the unit.