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Cummins 3.9 Parts +
Cummins 3.9 parts, in stock and ready to be shipped to you. We have a full selection – and get them to you fast - with all orders being shipped within one business day. We also offer you a variety of shipping options so you can choose an option that works the best with your budget and needs. We want to be your partner, and help you with any questions. Our helpful staff will be happy to answer any of your questions.
Popular in marine applications, this popular engine is known for reliability and longevity. With the proper maintenance, and parts, you can keep this engine running smoothly for a long time.
To identify your engine, check the dataplate on the engine for the model.
To start shopping, click above, or continue reading for more information.
Cummins 3.9 Specifications and Info
What type of engine is the Cummins 3.9?
This engine is an inline, four cycle engine with four cylinders. This engine has a bore of 102mm by 119mm or 4.02 inches by 4.72 inches.
What is the C.G. distance from the front flywheel housing mounting face and distance above crankshaft centerline in a Cummins 3.9?
The C.G. distance from front flywheel housing mounting face is 269mm or 10.6 inches. The C.G. distance above crankshaft centerline (engine only) is 168mm or 6.6 inches.
What is the maximum allowable bending moment at the rear face of the block on a Cummins 3.9?
1356 N•m or 1000 lb-ft.
What is the minimum (and maximum) static installation angle for Cummins 3.9?
For in-line drives the minimum is 0 and the maximum is 12 degrees. For V-drives, the minimum is 3 and the maximum is 12 degrees. The is front-up, which refers to the front of engines. In V-Drives it will face the back of the boat.
What is the maximum allowable restriction to the fuel pump and maximum allowable return line pressure in a Cummins 3.9?
With a clean filter 63.5 mm Hg or 2.5 in. Hg. With a dirty filter it is 100 mm Hg or 4 in. Hg. For the return line, the maximum allowable return line pressure is 259 mm Hg or 10.2 in. Hg – except for the 4BTA which is 517 mm Hg or 20.4 in. Hg.
What is the maximum allowable intake restriction on a Cummins 3.9?
With a dirty element, it is 254 mm H2O (clean element) or 508 mm H2O (dirty element) or 10 / 20 in. H2O for non-turbo engines. For turbo and turbo-aftercooled engine, it is 380 / 635 mm H2O (dirty/clean) or 15 / 25 in. H2O.
Oil Information
What is normal oil pressure for a Cummins 3.9?
At Idle Speed (the minimum) it is 69 kPa or 10 PSI. The normal operating range is 207 - 448 kPa or 30 - 65 PSI.
What is the maximum allowable oil temperature for the Cummins 3.9?
120 °C or 250 °F.
What is the Cummins 3.9 engine oil capacity?
Between 9 and 10 quarts (oil pan.) The total system capacity is 11 quarts.
Cooling System Information
How much coolant is used in a Cummins 3.9 engine?
8.8 quarts for the engine only. 14 quarts for engines with a heat exchanger (4B, 4BT) or 18.4 quarts for 4BTA engines.
What is the maximum external pressure loss in the cooling system?
5 PSI.
What is the maximum static pressure of the coolant?
15 PSI (exclusive of Pressure Cap)
What is the standard thermostat range on a Cummins 3.9 engine?
181 – 203 °F
What is the maximum coolant temperature in a Cummins 3.9?
205 °F
Raw Water Pump Information
What is the maximum sea water pressure?
103 PSI
Battery Information
What is the minimum recommended battery capacity for the Cummins 3.9?
4B/4BT Cold Soak at -18°C (0°F), Cold Cranking Amperes (CCA). 800 400
Cold Soak at 0°C (32°F), Marine Cranking Amperes (MCA) 1000 500
4BTA Cold Soak at -18°C (0°F), Cold Cranking Amperes (CCA) 1100 500
Cold Soak at 0°C (32°F), Marine Cranking Amperes (MCA) 1375 625
All data is used for general reference only, subject to change.
Popular in marine applications, this popular engine is known for reliability and longevity. With the proper maintenance, and parts, you can keep this engine running smoothly for a long time.
To identify your engine, check the dataplate on the engine for the model.
To start shopping, click above, or continue reading for more information.
Cummins 3.9 Specifications and Info
What type of engine is the Cummins 3.9?
This engine is an inline, four cycle engine with four cylinders. This engine has a bore of 102mm by 119mm or 4.02 inches by 4.72 inches.
What is the C.G. distance from the front flywheel housing mounting face and distance above crankshaft centerline in a Cummins 3.9?
The C.G. distance from front flywheel housing mounting face is 269mm or 10.6 inches. The C.G. distance above crankshaft centerline (engine only) is 168mm or 6.6 inches.
What is the maximum allowable bending moment at the rear face of the block on a Cummins 3.9?
1356 N•m or 1000 lb-ft.
What is the minimum (and maximum) static installation angle for Cummins 3.9?
For in-line drives the minimum is 0 and the maximum is 12 degrees. For V-drives, the minimum is 3 and the maximum is 12 degrees. The is front-up, which refers to the front of engines. In V-Drives it will face the back of the boat.
What is the maximum allowable restriction to the fuel pump and maximum allowable return line pressure in a Cummins 3.9?
With a clean filter 63.5 mm Hg or 2.5 in. Hg. With a dirty filter it is 100 mm Hg or 4 in. Hg. For the return line, the maximum allowable return line pressure is 259 mm Hg or 10.2 in. Hg – except for the 4BTA which is 517 mm Hg or 20.4 in. Hg.
What is the maximum allowable intake restriction on a Cummins 3.9?
With a dirty element, it is 254 mm H2O (clean element) or 508 mm H2O (dirty element) or 10 / 20 in. H2O for non-turbo engines. For turbo and turbo-aftercooled engine, it is 380 / 635 mm H2O (dirty/clean) or 15 / 25 in. H2O.
Oil Information
What is normal oil pressure for a Cummins 3.9?
At Idle Speed (the minimum) it is 69 kPa or 10 PSI. The normal operating range is 207 - 448 kPa or 30 - 65 PSI.
What is the maximum allowable oil temperature for the Cummins 3.9?
120 °C or 250 °F.
What is the Cummins 3.9 engine oil capacity?
Between 9 and 10 quarts (oil pan.) The total system capacity is 11 quarts.
Cooling System Information
How much coolant is used in a Cummins 3.9 engine?
8.8 quarts for the engine only. 14 quarts for engines with a heat exchanger (4B, 4BT) or 18.4 quarts for 4BTA engines.
What is the maximum external pressure loss in the cooling system?
5 PSI.
What is the maximum static pressure of the coolant?
15 PSI (exclusive of Pressure Cap)
What is the standard thermostat range on a Cummins 3.9 engine?
181 – 203 °F
What is the maximum coolant temperature in a Cummins 3.9?
205 °F
Raw Water Pump Information
What is the maximum sea water pressure?
103 PSI
Battery Information
What is the minimum recommended battery capacity for the Cummins 3.9?
4B/4BT Cold Soak at -18°C (0°F), Cold Cranking Amperes (CCA). 800 400
Cold Soak at 0°C (32°F), Marine Cranking Amperes (MCA) 1000 500
4BTA Cold Soak at -18°C (0°F), Cold Cranking Amperes (CCA) 1100 500
Cold Soak at 0°C (32°F), Marine Cranking Amperes (MCA) 1375 625
All data is used for general reference only, subject to change.
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