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INJECTOR Marine Engine Spare Parts is a critical core fuel atomization component for marine engine systems. Made of high-quality wear-resistant and corrosion-resistant materials, it accurately sprays and atomizes fuel to achieve sufficient combustion inside the cylinder. It features precise dimensional accuracy, stable structural performance and excellent fatigue resistance, suitable for routine servicing, shipyard overhaul and fault repair under marine harsh working conditions.
A well-matched injector stabilizes engine combustion efficiency, prevents incomplete combustion and power loss failure, reduces component failure risks and equipment downtime, and ensures efficient and reliable operation of marine engine units.
Please provide equipment model, specifications and part number before ordering to confirm compatibility.
RL(A/B)66 Injector | SULZER Main Engine Marine Diesel Vessel Parts
The RL(A/B)66 Injector is a high-precision fuel injection component exclusively designed for SULZER RL(A/B)66 series two-stroke low-speed marine diesel main engines. As the core fuel atomization unit of the engine combustion system, it sprays high-pressure fuel oil into the cylinder chamber in fine mist form at precise timing. It ensures full fuel-air mixing and stable combustion inside the cylinder, directly determining engine power output, fuel consumption and exhaust emission status. During continuous heavy-duty navigation, the injector controls fuel injection quantity, injection timing and atomization quality. If the injector suffers nozzle clogging, needle valve wear, internal leakage or poor atomization, it will cause incomplete combustion, black smoke emission, power drop, abnormal cylinder temperature and even engine misfire, bringing hidden risks to vessel navigation. Replacing with standard RL(A/B)66 injector restores original fuel atomization performance and ensures reliable main engine operation.
Working under harsh marine operating conditions including long-term full-load navigation, high cylinder temperature, high fuel pressure and salt-fog corrosion, the injector nozzle and needle assembly will gradually wear and coke after long service hours. Deteriorated injectors lead to uneven combustion, increased fuel cost and accelerated wear of cylinder liner and piston components. Regular inspection and replacement of injectors are essential items for main engine overhaul and dry dock maintenance.
This precision RL(A/B)66 injector features ultra-fine atomization structure and stable opening pressure. It can form uniform fuel mist inside the combustion chamber under rated high fuel pressure, realizing complete combustion and reducing carbon deposition on piston crown, cylinder cover and exhaust passage. It maintains consistent injection timing and fuel delivery under engine variable load conditions.
With excellent wear resistance and high-temperature performance, the internal needle valve and nozzle assembly resist high-temperature fuel erosion and carbon accumulation. Reliable injection performance stabilizes cylinder working condition, cuts fuel consumption and lowers the risk of abnormal thermal load, greatly improving operational safety and long-cycle stability of SULZER RL(A/B)66 main engines for ocean-going vessels, bulk carriers and container ships.
This RL(A/B)66 dedicated injector is manufactured from high-strength heat-resistant alloy steel, customized for the high temperature and high pressure working environment of SULZER RL series main engines. The nozzle and needle valve pair adopts ultra-precision lapping matching process to achieve micron-level fitting clearance. Multi-stage heat treatment improves hardness and thermal stability. The whole manufacturing process follows OEM technical requirements and universal marine diesel industry specifications, ensuring stable injection pressure and good anti-coking performance.
Quantified Marine-Grade Performance Parameters
Parameter | Specification | Test & Implementation Standard |
Nozzle & Needle Material | Heat-resistant high-strength alloy steel | Raw material spectrum inspection |
Surface Treatment | Hardening treatment, precision lapping | Hardness & surface roughness test |
Dimensional Tolerance | Micron-level matching tolerance for needle & nozzle | CMM full dimensional inspection |
Injection Performance | Stable opening pressure, fine atomization | Fuel injection bench test |
Working Temperature Range | High temperature resistance for cylinder combustion area | High temperature durability test |
Service Feature | Anti-coking, wear-resistant, stable injection | Marine fuel medium adaptability test |
Compliance Standard | Universal marine industrial manufacturing specifications | General marine diesel engine industry norms |
All RL(A/B)66 injectors are manufactured strictly in accordance with SULZER OEM engineering drawings and marine fuel injector standards. Each injector undergoes raw material verification, precision machining, needle-nozzle lapping and assembly adjustment. Finished products will be tested for opening pressure, atomization status, tightness and fuel leakage performance on professional injection test bench.
Every finished injector passes full pre-delivery inspection. All dimensions and injection parameters match original specifications, supporting direct drop-in replacement without secondary adjustment, improving overhaul efficiency and ensuring excellent combustion performance of the main engine cylinder.
MAIN ENGINE | MAN B&W | S26MC,L/S35MC,L/S42MC,L/S50MC,L/S60MC,L/S70MC,L/S80MC,L/S90MC,S46MC-C,S50MC-C,S60MC-C,S70MC-C,S80MC-C,S90MC-C,K90MC-C,K98MC-C,K/L45GF(CA),55GF(CA),67GF(CA),80GF(CA),90GF(CA) |
WARTSILA | 6L20,9L20,8L32,R22,R32,L20,L32 | |
PIELSTICK | PC2-2,PC2-5,PC2-5L,PC2-5V,PC2-6,PA4,PA5,PA6 | |
HANSHIN | EL30-44,ELS-35,44,LH-28G,LU24-54,LUN28AR(G),LUS24-58,LF46-58 | |
NIIGATA | 16HS,16X,18CX,19HX,20AX,25BX,25CX,26AFTE,26KGHS,28AFTE,28BX,28KGHS,31EZ,31X,32CLX,34AFTE | |
SULZER | RTA38,RTA48,RTA52,RTA58,RTA62,RTA68,RTA72,RTA76,RTA84,RL(A/B)56,RL(A/B)66,RL(A/B)76, RL(A/B)90,RND68,RND76 | |
AKASAKA | A31,A34,A38,A41,A45,AH25,AH27,AH28,AH30,AH38,AH40,K28,K31,DM28FD,DM38FD,DM40FD,DM51SS | |
MITSUBISHI | UEC33LSE,UEC37LA,UEC45LA,UEC50LS,UEC52LA,UEC52LS,UEC60LS,UET45/75C,UET45/80D, UET52/90D,UET52/105H | |
AUX.ENGINE | MITSUBISHI | S6A,S6B,S6R,S6N,S16N,S16R,S12R,SA2 |
MAN B&W | 16/24,20/27,21/31,23/30,25/33,28/32,32/40,48/60,58/64 | |
YANMAR | HAL,KL,KDL,KFL,RAL,MAL,S165,S185,M200,M220,T220,T240,T260,Z280,N165,N18,N21,N165,N260,N280, N330,NY16,EY18,EY22,EY26,4CHL,6CHL | |
DAIHATSU | DK20,DK26,DK28,DK32,DL16,DL19,DL20,DL22,DL24,DL26,DL28,DL32,DS18,DS19,DS22,DS26,DS28,DS32, DS40,PK14,PK16,PL24,PL26,PS18,PS20,PS22,PS26,PS30 |
We supply full-series matching spare parts for SULZER RL(A/B)66 main engine overhaul, including nozzle assembly, needle valve, compression spring, sealing rings, fuel pump spare parts and overhaul kits, offering one-stop procurement solutions for shipyards, shipping companies and marine service suppliers.
Each batch of RL(A/B)66 injectors undergoes full-process inspection and performance screening, including raw material spectrum analysis, metallographic inspection, dimensional verification, opening pressure calibration, atomization test and tightness leakage test. All inspection records are archived for customer review and dry-dock audit.
Manufactured in strict compliance with universal marine diesel industry norms and SULZER OEM technical specifications. This injector meets the demands of routine navigation and vessel overhaul projects, serving as reliable replacement accessories for marine main engines.
Injector is a critical fuel atomization component for SULZER RL(A/B)66 main engine combustion system. Long-time high temperature, high pressure and heavy fuel oil will cause nozzle coking, needle wear and injection pressure drift. Replace the injector during major overhaul if poor atomization, fuel leakage or unstable cylinder pressure is detected. Installing new standard RL(A/B)66 injector restores original fuel injection quality, optimizes combustion and protects cylinder components from thermal damage.
Inspect injectors regularly during routine maintenance. For vessels with long-term heavy-load operation, monitor exhaust color, cylinder temperature and fuel consumption. Timely replacement prevents incomplete combustion and secondary abrasion of piston and liner, securing stable and safe vessel operation.
Which engine does this injector fit? This injector is specially customized for SULZER RL(A/B)66 two-stroke marine diesel main engines, also compatible with multiple mainstream marine main and auxiliary engine models listed above. Please provide complete engine model or original part number for accurate matching confirmation.
What is the delivery time? Standard RL(A/B)66 models are in stock with 7–10 working days fast delivery. Non-standard customized specifications support 7–15 working days production cycle.
Can you provide customized processing services? Yes, we support OEM customization and non-standard processing according to customer drawings and samples. All customized products undergo full-dimensional inspection and injection bench testing before shipment.
What is your warranty policy? 12-month warranty for material and manufacturing defects. We provide professional after-sales technical support including installation guidance and injection pressure calibration.
What is the MOQ and export packaging? MOQ is 1 unit for in-stock products, with favorable bulk discount for fleet batch orders. Standard export packaging adopts anti-rust oil treatment, moisture-proof wrapping and solid plywood crating, adapting to long-distance ocean transportation and overseas storage.
