The Sulzer ZA40S engine was developed as a long-stroke successor of the earlier ZA40 engines in 1986. Much like it’s predecessors, the ZA40S engines were designed primarily for propulsion use on medium-sized vessels such as ferries, icebreakers and cargo vessels and for industrial use as well. These engines became especially popular in the cruise ship sector. The biggest change in ZA40S from it’s predecessors was it’s longer stroke of 560 mm. This allowed the ZA40S engines to produce more power, with about 720 kW per cylinder, at operating speeds of 500 to 515 rpm. The ZA40S engines were of course HFO compatible. The ZA40S engine shared similar features as the ZA40 engines: drilled cooling spaces in cylinder heads, cylinder liners and piston crowns for high mechanical stiffness and low thermal stress; nimonic exhaust valves with water cooled seat inserts for a longer TBO; cylinder heads without valve cages to improve maintainability. There were some improvements: exhaust valves with a 45 degree seat angle for cooling without reduction of mechanical and thermal safety at the higher engine load; the top ring of the ZA40S piston featured a Sulzer plasma-coated running face while the running faces of the other two rings were chromium plated. And as with all Sulzer Z type engines, the ZA40S also had rotating pistons. 

Though now considered legacy engines, support for ZA40S still remains readily available through Sulzer licensees and specialists, and independent engine parts suppliers. With access to major engine components sourced from decommissioned vessels and reliable sourcing through trusted local traders, Alang Maritime is a dependable option for Sulzer ZA40S engine spare parts.

Engine Configurations: 6ZA40S, 8ZA40S, 9ZA40S, 12ZAV40S, 14ZAV40S, 16ZAV40S, 18ZAV40S

Supply scope of Alang Maritime for ZA40S engines:

Crankshafts, cylinder heads, cylinder liners, pistons, connecting rods, engine blocks, exhaust valves, valve seats, bearings, lube oil pumps, air starters, fuel injectors, plungers and other consumables.

Alang Maritime is one of Southeast Asia’s premier suppliers of high quality second hand spare parts for two-stroke and four-stroke marine diesel engines. We can supply new (unused surplus) parts that are obtained from scrap vessels or shipowners’ surplus from cancelled projects. We can also supply reconditioned parts, as well as used parts that are offered with technical reports.

The brands that we supply parts for are:

Yanmar | Daihatsu | MaK | Wärtsilä | MAN B&W | Bergen | Sulzer | Pielstick | Caterpillar | Niigata | Hyundai-HiMSEN

Alang Maritime stocks new, reconditioned, as well as quality controlled used parts for marine diesel engines. Our strengths are our 30+ years of experience in the maritime industry, a huge stocking space of more than 3,500 sq. mt., an extensive stock of more than 25,000+ engine parts, our technical knowledge of marine diesel engines and our close proximity to the Indian ship recycling yard of Alang. That is why Alang Maritime is your premier solution for high quality marine diesel engine parts at an economical cost.