What Makes Sulzer Spares Different
Sulzer two-strokes (RTA, RND, and the later RT-flex) share architecture with their MAN B&W contemporaries but differ in fuel-injection philosophy and liner design details. Practically, this means two things for buyers: fuel equipment condition dominates the economics of a used Sulzer parts lot, and liner/piston-ring matching matters more than the price tag suggests.
Check These First
- Fuel injection pumps and injectors: RTA fuel equipment runs at extreme pressures; plunger/barrel scoring is terminal. Ask for pop-test and back-leakage figures, not just "tested OK".
- Cylinder liners: look for the characteristic upper-bore scuff bands and measure chrome-layer thickness where applicable. A liner within 0.05 mm of scrap diameter is not a saving.
- Piston rings and ring grooves: axial groove wear decides whether a used piston is re-ringable. Demand groove-clearance numbers.
- Crankshafts: same acceptance discipline as any slow-speed shaft — journal mics, run-out, MPI on fillets. Our Sulzer 8S20 crankshaft page shows the documentation standard to expect.
Stock We Hold
Rotating Sulzer inventory currently includes crankshafts and the 6S20H engine block, backed by the inspection routine in our crankshaft verification guide. Anything RTA-family outside shelf stock is sourced against your part number through our Sulzer desk — send it via the contact page with the engine type and serial prefix.
