Kubota D1105-E4 User Manual (English)

Questions and Answers:

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Christopher RobertsonAug 9, 2025
How to troubleshoot a Kubota D1105-E4 Engine that is difficult to start?
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  rachelwillisAug 9, 2025
  If you're having difficulty starting your Kubota Engine, consider these possible causes and solutions: * **Thick fuel:** Check the fuel tank and fuel filter. Remove any water, dirt, or impurities. Clean the filter with kerosene if it contains water or foreign matter. * **Air or water in the fuel system:** Carefully check for loosened fuel line couplings or loose cap nuts. Loosen the joint bolt stop fuel filter and air vent screws of the fuel injection pump to eliminate air from the fuel system. * **Thick engine oil:** Change the grade of oil according to the weather (temperature). * **Discharged battery:** Charge the battery. In winter, remove the battery from the machine, fully charge it, and store it indoors until use.
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Zachary FaulknerAug 20, 2025
What to do if my Kubota D1105-E4 suddenly stops?
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  Kelly ToddAug 20, 2025
  If your Kubota Engine suddenly stops, there could be several reasons: * **Lack of fuel:** Check the fuel tank and refill if needed. Also, inspect the fuel system for air or leaks. * **Bad nozzle:** Replace the nozzle if necessary. * **Overheated moving parts:** Check the engine oil level using the oil level gauge and inspect the lubricating oil system. Replace the oil filter cartridge every two oil changes.
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Emily RileyAug 28, 2025
Why is the output of my Kubota D1105-E4 Engine insufficient?
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  derrick31Aug 29, 2025
  If you're experiencing insufficient output from your Kubota Engine, here's what you should check: * **Fuel insufficiency:** Check the fuel system. * **Overheating moving parts:** Inspect the lubricating oil system and ensure the lubricating oil filter is working correctly. Replace the filter element if it's clogged with impurities. * **Dirty air cleaner:** Clean the element every 100 hours of operation. * **Injection pump wear:** Avoid using poor-quality fuel, as it can cause pump wear. Use only No. 2-D diesel fuel.

Kubota D1105-E4 Specifications

General

Engine Model	D1105-E4
Number of Cylinders	3
Displacement	1.123 L
Fuel System	Direct Injection
Cooling System	Water-cooled
Fuel	Diesel
Aspiration	Natural
Starting System	Electric starter
Bore and Stroke	78 mm x 78.4 mm
Rated Output	24.8 HP
Lubrication System	Forced lubrication
Type	4-cycle, vertical, water-cooled, diesel