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Caterpillar 3126 Marine Engine Propulsion Info

3126 Caterpillar Engine

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Accessory Equipment

Power produced at the flywheel will be within standard tolerances up to 50°C (122°F) combustion air temperature measured at the air cleaner inlet, and fuel temperature up to 52°C (125°F) measured at the fuel filter base. Power rated in accordance with NMMA procedure as crankshaft power. Reduce crankshaft power by 3% for propeller shaft power.

This Caterpillar Marine Engine can be operated with air inlet temperatures up to 50°C (122°F) measured at the air inlet, and fuel temperatures up to 52°C (125°F) measured at the fuel filter base. Power rated in accordance with NMMA procedure as crankshaft power. Reduce crankshaft power by 3% for propeller shaft power.

Parts for 3126 Caterpillar Engines

Specifications



I-6, 4-Stroke-Cycle-Diesel

Emissions
IMO compliant
Bore— mm (in)
110 (4.33)
Stroke— mm (in)
127 (5.0)
Displacement— L (cu in)
7.2 (442)
Rotation (from flywheel end)
Counterclockwise
Compression Ratio
15.5:1
Capacity for Liquids — L (U.S. gal)
 
Cooling System
28 (7.4)
Lube Oil System (refill)
25 (6.6)
Oil Change Interval — hrs
250
Caterpillar DEO 10W30 or 15W40
 
Engine Weight, Net Dry
(approx) — kg (lb)
722 (1,592)

Standard Engine Equipment

  • Air Inlet
    • 12V air inlet heater, sea water aftercooler, air cleaner/fumes disposal, turbocharger
  • Charging System
    • 12V, 51 amp charging alternator
  • Control System
    • mechanical governor, forward facing throttle control
  • Cooling System
    • thermostats and housing, belt-driven centrifugal jacket water pump, gear-driven auxiliary sea water pump, expansion tank, marine gear oil cooler, engine mounted heat exchanger with removable copper-nickel tube bundle, auxiliary sea water lines
  • Exhaust System
    • watercooled exhaust manifold and turbocharger, fumes disposal
  • Flywheel and Flywheel Housing
    • SAE No. 3 flywheel (126 teeth) and SAE No. 3 flywheel housing, SAE standard rotation
  • Fuel System
    • RH or LH service filter, fuel transfer pump
  • Instrumentation
    • magnetic pickup tachometer drive, wiring harness includes junction box, mounting and hardware, 12V oil pressure and water temperature sender group (single station)
  • Lube System
    • crankcase breather, gear-driven engine oil pump, RH or LH service oil filter, oil filler, oil level gauge, pan drain, lubricating oil
  • Protection System
    • 12V energized-to-run solenoid shutoff, alarm contactor
  • Starting System
    • 12V rear-facing electric starting motor, 12V junction box
  • General
    • vibration damper and guard, Caterpillar yellow paint, lifting eyes

Standard Equipment



  • Air intake
    • aftercooler, air cleaner/fumes disposal (closed system), air inlet heater
  • Alternator
    • belt driven, 12 volt, 51 ampere
  • Cooling
    • transmission oil cooler, heat exchanger, auxiliary sea water pump, expansion tank, thermostat, jacket water pump
  • Exhaust
    • watercooled manifold and turbocharger
  • Flywheel and housing
    • SAE No. 3, rear-facing starter
  • Fuel
    • filter, fuel transfer pump
  • Governor
    • mechanical
  • Instrumentation
    • magnetic pickup (for tachometer drive)
  • Lubricating
    • oil filter, filler, dipstick, crankcase breather, oil pump
  • Service RH and LH
    • service per top level PAs
  • Starting
    • electric
  • Torsional vibration damper
  • Wiring harness
    • junction box, mounting and hardware

Rating Definitions and Conditions



E Rating – Planing hull vessels such as pleasure craft, harbor patrol, harbor master, and some fishing and pilot boats.

  • 224 bkW (300bhp) @ 2800 rpm
  • 261 bkW (350bhp) @ 2800 rpm
  • 287 bkW (385bhp) @ 2800 rpm

Ratings are based on SAE J1228/ISO8665 standard conditions of 100 kPa (29.61 in Hg), 25°C (77°F), and 30% relative humidity. These ratings also apply at ISO3046/1, DIN6271/3, and BS5514 conditions of 100 kPa (29.61 in Hg), 27°C (81°F), and 60% relative humidity.

Ratings are based on SAE J1228/ISO8665 standard conditions of 100 kPa (29.61 in Hg), 25°C (77°F), and 30% relative humidity. These ratings also apply at ISO3046/1, DIN6271/3, and BS5514 conditions of 100 kPa (29.61 in Hg), 27°C (81°F), and 60% relative humidity.

Fuel rates are based on fuel oil of 35° API [16°C (60°F)] gravity having an LHV of 42 780 kJ/kg (18 390 Btu/lb) when used at 29°C (85°F) and weighing 838.9 g/liter (7.001 lbs/U.S. gal). Additional ratings may be available for specific customer requirements. Consult your Caterpillar representative for additional information.

Additional ratings may be available for specific customer requirements. Consult your Caterpillar representative for additional information.

 
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