OEM Cylinder Liner 733615-01830 for Yanmar 6RY17P-GV 1000HP Marine Engine – Premium Repair Part
The Yanmar 6RY17P-GV is a high‑output, 6‑cylinder marine diesel engine renowned for delivering 1,000 HP of reliable propulsion power for large fishing vessels, offshore supply boats, and high‑speed coastal ferries. At the core of its ability to sustain continuous full‑load operation in harsh saltwater environments lies the cylinder liner – a component that must withstand extreme combustion pressures, intense thermal cycling, and constant piston ring friction. The 733615-01830 OEM cylinder liner is a premium, factory‑specification replacement engineered specifically for this powerhouse, offering exceptional wear resistance, precise dimensional accuracy, and a direct drop‑in fit.
Whether you are performing a major overhaul or addressing scoring in a single cylinder, this liner – often supplied as a bare unit or with matching O‑ring seals – restores compression, eliminates blow‑by, and extends your engine's service life. In this comprehensive guide, we examine its robust metallurgy, compatible engine variants, common failure indicators, professional installation best practices, and why Rsolid Engine Parts is the preferred global supplier for Yanmar marine components.
1. Structural Features & Advantages of the 733615‑01830 Cylinder Liner
The 733615‑01830 is not a generic casting – it is a precision‑engineered component designed to meet Yanmar's exacting standards for high‑speed, high‑boost marine diesel applications. Its key design features include:
High‑alloy wear‑resistant cast iron – Manufactured from a specialised chromium‑molybdenum‑vanadium (Cr‑Mo‑V) alloy cast iron, this material offers exceptional resistance to adhesive wear (scuffing), abrasive wear, and thermal fatigue. The alloy chemistry is specifically optimised to maintain hardness at elevated operating temperatures (up to 300°C on the inner surface), preventing bore softening and ensuring consistent ring sealing over thousands of hours.
Induction‑hardened and plateau‑honed bore – The inner running surface is induction‑hardened to achieve a uniform surface hardness of HRC 52‑58, providing a durable wear layer that resists scoring from piston ring micro‑movement under 1,000 HP loads. The final finishing process uses a multi‑stage plateau honing technique, creating a controlled cross‑hatch pattern (30‑45° included angle) with a surface roughness (Ra) of 0.15 – 0.30 µm. This optimises oil film retention for rapid ring seating during break‑in and significantly reduces oil consumption throughout the liner's service life.
Precision wet liner design with O‑ring sealing – As a wet‑type liner, the outer surface is in direct contact with engine coolant. The 733615‑01830 features accurately machined O‑ring grooves at the lower section, designed to accommodate high‑temperature FKM (Viton®) seals. These grooves maintain a positive coolant seal, preventing coolant migration into the crankcase (oil emulsification) and combustion gases from entering the cooling system (overheating).
Corrosion‑resistant outer surface treatment – The external water‑jacket area receives a specialised anti‑cavitation coating and passivation treatment, which resists pitting and erosion caused by coolant vibration and chemical attack – a critical feature for marine engines operating with seawater‑cooled heat exchangers.
Precision‑ground top flange – The upper flange is ground to a mirror finish with micron‑level flatness (typically ±0.02 mm), ensuring a perfect seal against the cylinder head gasket. The correct liner protrusion (factory set at 0.05‑0.15 mm above the block deck) is maintained to exact specifications, guaranteeing optimal head gasket compression and combustion sealing under extreme cylinder pressures.
Operational advantages for marine engineers and vessel owners:
Reduced oil consumption – The plateau‑honed finish and optimal roundness minimise oil bypass past the rings, cutting top‑up frequency by up to 25% compared to worn liners.
Extended overhaul intervals – With proper fuel, air filtration, and coolant maintenance, this liner reliably achieves 10,000 – 15,000 hours of service life.
Consistent compression and power – A true, unworn bore ensures maximum cylinder pressure, translating to better fuel economy and reduced black smoke under heavy load.
Prevents premature ring wear – The correct bore hardness and finish extend the life of compression rings, reducing overall rebuild costs.
100% direct drop‑in fit – Identical to the original Yanmar part in all critical dimensions – no block boring or shimming required.
2. Compatible Engine Models & Typical Applications
The 733615-01830 cylinder liner is specifically engineered for the high‑power Yanmar 6RY17P-GV engine. This 6‑cylinder, inline, 4‑stroke, turbocharged diesel is a flagship model in Yanmar's 17‑litre platform.
| Engine Model | Power Output | Typical Applications |
|---|
| Yanmar 6RY17P‑GV | 1,000 HP (approx. 735 kW) | Main propulsion for large fishing trawlers, offshore supply vessels, coastal freighters, high‑speed ferries |
| Yanmar 6RY17P‑GV (Genset variant) | Prime/standby power | Auxiliary generator sets on large vessels and offshore platforms |
Critical cross‑reference: The 733615‑01830 is the genuine Yanmar service part number for standard‑size cylinder liners in the 6RY17P‑GV engine. Oversize liners may be available (+0.25mm, +0.50mm) – confirm your current bore measurement and engine serial number (e.g., 6RY‑****) before ordering. This liner is typically supplied as a bare unit; O‑ring seals, head gaskets, and piston rings are ordered separately or as part of a complete overhaul kit.
3. Common Failure Modes & Installation/Replacement Recommendations
Typical Warning Signs Your Liner Needs Replacement
High oil consumption with blue exhaust – Indicates bore glazing, excessive wear, or deep scoring that prevents the rings from properly scraping oil from the cylinder wall.
Excessive blow‑by and crankcase pressurisation – Oil mist from the dipstick tube or breather due to worn bore ovality or deep scuff marks from 1,000 HP loads.
Coolant loss without visible external leaks – Milky oil emulsion (coolant in oil) points to a failed lower O‑ring seal or a cracked liner allowing coolant into the crankcase.
Combustion gas in coolant – Bubbles in the expansion tank indicate a cracked liner or failed upper seal allowing high‑pressure gases into the cooling system.
Loss of power and rough running – Reduced compression from a worn or scored liner leads to hard starting, misfiring, and reduced load capacity.
Professional Installation Best Practices
Correct installation is critical for achieving maximum liner life. Follow these essential steps:
Clean the cylinder block bore – Remove the old liner and thoroughly clean the block's liner seat using a suitable solvent and a non‑abrasive pad. Remove all carbon deposits, old sealant, and rust. The seat must be perfectly dry and free of any foreign material.
Measure the block housing – Use a dial bore gauge to measure the block's liner housing for ovality and out‑of‑round. Ensure it is within service limits (typically less than 0.03 mm variation). If worn, oversize liners or block machining may be required.
Inspect and lubricate O‑rings – Lightly coat the new FKM O‑rings (purchased separately or as a kit) with clean engine oil or a specialised rubber lubricant. Never use silicone grease or petroleum jelly – these can prevent O‑rings from seating correctly and cause coolant leaks.
Install the liner with even pressure – Using a dedicated liner installation tool or a hydraulic press, insert the liner straight down into the block bore. Never use a hammer directly on the liner flange, as this will distort the honed bore. Apply steady, even pressure.
Measure liner protrusion – After installation, measure the liner's height above the block deck at three or four points using a dial gauge and a bridge piece. Protrusion should be consistent (typically 0.05 – 0.15 mm) and within specification – the variance should not exceed ±0.03 mm. Incorrect protrusion causes head gasket failure.
Final bore check – Re‑check the bore for roundness and taper to ensure no distortion occurred during fitting.
Assemble piston and rings – Fit the piston rings using a proper ring expander, stagger gaps at 120°, and lubricate the piston and liner bore with clean engine oil. Use a ring compressor to insert the piston assembly smoothly.
Re‑torque cylinder head – Follow Yanmar's factory torque sequence and specifications (typically stage torque + angle‑tighten). Re‑torque after the initial heat cycle and again after 50 operating hours.
Break‑in procedure – Run the engine at low idle (no load) for 15‑20 minutes, then gradually increase load over the next 8‑10 hours. Avoid sustained full‑load operation during break‑in. Change the engine oil and filter after the initial break‑in period.
4. Why Rsolid Engine Parts Is Your Preferred Global Supplier
Rsolid Engine Parts has been a trusted supplier of Yanmar, Mitsubishi, and Caterpillar diesel components for over 15 years, serving marine fleets, power plants, and workshops across six continents. Here is why the 733615‑01830 cylinder liner from Rsolid is the right choice:
OEM‑equivalent manufacturing – Produced in ISO 9001:2015 and IATF 16949 certified foundries, using the identical chromium‑molybdenum‑vanadium alloy chemistry and induction‑hardening processes as genuine Yanmar service parts.
100% precision inspected – Every liner is checked for bore roundness, straightness, surface finish (Ra), hardness (HRC), and flange dimensions using advanced CMM equipment. We guarantee a perfect fit for your 1,000 HP engine.
Matching seal kits available – We supply high‑temperature FKM (Viton®) O‑rings and seal kits, so you have everything needed for a leak‑free installation.
Global stock and rapid dispatch – Strategically warehoused in Asia, Europe, and North America – typical delivery 3‑7 working days to major international ports and airports.
Competitive wholesale pricing – Volume discounts for workshops, fleet operators, and parts distributors. Ask about our bulk order and container shipping rates.
Free expert technical support – Our in‑house marine engineers provide installation torque guides, protrusion measurement tips, and troubleshooting via WhatsApp or email.
Solid warranty – 12 months / 2,000 operating hours against casting defects, premature wear, and material failures – with a straightforward return and replacement policy.
Contact Rsolid Engine Parts Today
📧 Email: amy@rinjector.com
📱 WhatsApp: +86 15975376778
Whether you need a single 733615‑01830 liner for a running repair or a full set of six liners for a complete Yanmar 6RY17P‑GV 1000HP overhaul, Amy and her team will provide a detailed quotation, stock availability, and shipping schedule within 2 hours. We also supply complementary parts – piston assemblies, ring kits, connecting rod bearings, O‑ring seals, and complete gasket sets – for comprehensive engine rebuilds.
Choose the 733615‑01830 cylinder liner from Rsolid – engineered to deliver exceptional wear resistance, consistent compression, and reliable 1,000 HP power for your Yanmar marine engine.
