G Series Marine Engine

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Description
The G series marine engine is a fourth-generation product which features a modular design on the basis of 3128 Xinlong marine engine designed by SDEC together with AVL. Most parts are shared with the previous generation product. The stroke of the high power SC15G engine is extended to 165mm, providing high reliability, high torque and good efficiency.

This series marine diesel engine has earned good reputation among users due to its high reliability, high torque at low speed, long maintenance interval and low use cost, etc. And it is praised as the perfect combination of power and efficiency. It is widely applicable to various inland transport ships, fishing boats, towboats, working ships and other boats, as well as marine generator sets of 120-300KW.

Outline dimensional drawing

G128 L: 1458mm W: 823mm H: 1028mm
SC15G L: 1680mm W: 884mm H: 1550mm

Technical parameters

Model	Aspiration method	Continuous power/speed kW/r/min	Overload power/speed kW/r/min	Unlimited Navigation Areas rated power/speed kW/r/min	Unlimited Navigation Areas overload power/speed kW/r/min	Min.fuel consumption g/kW.h	Oil consumption g/kW.h	Weight kg	Notes
G128ZCa	T	162/1500	178.2/1545	155.5/1500	171.5/1545	215	≤0.4	1315	Main engine
G128ZCa1	T	162/1800	178.2/1854	155.5/1800	171.5/1854	215	≤0.4	1315	Main engine
G128ZLCa	TA	187/1500	206/1545	180/1500	198/1545	195	≤0.4	1350	Main engine
G128ZLCa1	TA	200.5/1500	220.5/1545	193/1500	212.3/1545	195	≤0.4	1350	Main engine
G128ZLCa2	TA	236/1500	260/1545	227/1500	250/1545	195	≤0.4	1350	Main engine
G128ZLCa5	TA	267/1500	284/1545	254.9/1500	280.3/1545	195	≤0.4	1350	Main engine
G128ZLCa3	TA	187/1800	206/1854	180/1800	198/1854	195	≤0.4	1350	Main engine
G128ZLCa12	TA	236/1800	260/1854	227/1800	250/1854	195	≤0.4	1350	Main engine
G128ZLCa15	TA	267/1800	294/1854	254.9/1800	280.3/1854	195	≤0.4	1350	Main engine
SC15G400CA2	TA	267/1500	294/1545	254.9/1500	280.3/1545	195	≤0.4	1350	Main engine
SC15G420CA2	TA	280/1500	308/1545	272/1500	300/1545	195	≤0.4	1350	Main engine
SC15G460CA2	TA	308/1500	338/1545	300/1500	330/1545	195	≤0.4	1350	Main engine
SC15G500CA2	TA	330/1500	363/1545	320/1500	352/1545	195	≤0.4	1350	Main engine
SC15G420.1CA2	TA	280/1800	308/1854	272/1800	300/1854	195	≤0.4	1350	Main engine
SC15G500.1CA2	TA	330/1800	363/1854	320/1800	352/1854	195	≤0.4	1350	Main engine

Bore × stroke (mm)	Displacement (L)	Type	Aspiration	Steady speed governing rate (%)	Idling (r/min)	Exhaust temperature (℃)	Compression ratio	Oil capacity (L)
G128 135x150 SC15G 135x165	12.8 14.2	In-line, 6-valve	T-Turbocharged TA-Turbocharged and intercooler	0%-5%	680	≤550	15.75:1 15.55:1	32.5

Note

Flywheel house and flywheel are SAE1# and SAE14#.
There are single-layer and two-layer high pressure oil pipes optional.

Features

Through FEA modal analysis and coupling strength calculation, we improved designs like body strengthening and the installation of an integral cylinder head.
15G adopts integral non-quenched and tempered steel crankshaft to make the fatigue resistance and service life of the engine improved by 30%.
The combustion system is optimized. After CFD analysis, the large flow cooling pump and oil pump and new type high-efficiency pressurizer are adopted to have a minimum fuel consumption of 198g/kW.h and a maximum torque of 2300N.m. This realizes the requirements for marine engine of low oil consumption and good acceleration property.
After improved designs like flange fuel injection pump drive, added new type oil-gas separation device, optimized thermostat and fuel pipeline, integral heat exchanger and expansion bank and new type sealing gasket, the product quality of this G series product is improved and the visual layout is also more reasonable.
This G series engine adopts cracking connecting rod and core-pulling water-air intercooler. The spare parts universality with previous generation product is high, reducing operation cost with convenient maintenance.

Related Products
diesel engine, SDEC engine, commercial engine, industrial engine