Yanmar Marine Parts & Spares

Yanmar Parts: a full catalogue of over 4,300 references

At Repuestos Marinos we specialise in Yanmar Marine parts for marine diesel engines. We cover the entire range with more than 4,300 references in stock: the 1GM, 2GM, 3GM and 3HM units of the GM family; the 2YM, 3YM and 4JH of the modern range; and the larger 4LH, 4LHA, 6LP and 6LY engines.

Yanmar is one of the most reliable marine diesel manufacturers on the market, with engines that comfortably pass 10,000 hours when servicing is kept up. The trade-off is that they demand the right parts and discipline with service intervals: impeller, anodes, filters and heat exchanger gaskets are the consumables that make the difference between a healthy engine and an expensive breakdown.

Yanmar parts categories

More than 4,300 Yanmar references organised into 57 sub-families. Find the part you need fast:

Cooling and raw water circuit

• YANMAR Impellers Yanmar (30)
• Water Pump Kits Yanmar (5)
• Water Intake Pumps Yanmar (10)
• Fresh Water Pumps Yanmar (8)
• Water Pump Seals Yanmar (21)
• YANMAR Engine Thermostats Yanmar (24)
• Thermostat Gaskets Yanmar (10)
• Yanmar Coolers & Heat Exchangers (108)
• Cooler Seal Kits Yanmar (4)
• YANMAR Hose Fittings Yanmar (234)

Fuel, injection and filters

• YANMAR Fuel Filters Yanmar (34)
• Fuel Pumps Yanmar (14)
• Yanmar Injection Components (79)
• YANMAR Oil Filters Yanmar (23)
• YANMAR Air Filters Yanmar (13)

Exhaust and turbo

• Exhaust Elbows Yanmar (53)
• Exhaust Gaskets Yanmar (12)
• Turbochargers Yanmar (35)
• Turbo Gaskets Yanmar (10)

Electrical system and sensors

• Starter Motors Yanmar (12)
• Alternators Yanmar (38)
• YANMAR Sensors Yanmar (51)
• Panels Yanmar (31)
• Ignition Switches Yanmar (3)
• Yanmar Wiring (131)

Engine block, gaskets and timing

• YANMAR Motor Gasket Kits Yanmar (20)
• YANMAR Cylinder Head Gaskets Yanmar (37)
• Other Yanmar Gaskets (374)
• Rubber O-rings Yanmar (112)
• Pistons Yanmar (79)
• Piston Rings Yanmar (24)
• Intake & Exhaust Valves Yanmar (55)
• Yanmar Valve Components (90)
• Crankshaft Bearing Bushes Yanmar (24)
• Water Pump Belts Yanmar (24)

Saildrive, propeller and anodes

• YANMAR Propellers Yanmar (33)
• YANMAR Anodes Yanmar (46)
• Yanmar Gears (107)
• Motor Mounts Yanmar (6)

Fasteners, hoses and general components

• Yanmar Tubes & Pipes (534)
• Yanmar Bolts & Screws (287)
• Yanmar Brackets (304)
• Yanmar Covers (190)
• Yanmar Springs (126)
• Yanmar Plugs (98)
• Yanmar Nuts (76)

Parts by Yanmar engine model

If you know your model and prefer to search the official parts diagrams, we have the Repuestos y Despieces de Motores Yanmar with 438 references organised by figure and callout number.

Models covered: 1GM, 1GM10, 2GM, 2GM20, 3GM, 3GM30, 3HM35 (classic GM series); 2YM15, 3YM20, 3YM30 (YM series); 3JH2, 3JH3, 4JH2, 4JH3, 4JH4, 4JH5 (JH series); and 4LH, 4LHA, 6LP, 6LPA, 6LY, 6LYA at the higher-output end of the range. The full model number is on the engine plate, next to the serial number: write it down before ordering, because many parts change between sub-versions of the same model.

Yanmar servicing: intervals and consumables

Yanmar sets a first service at 50 hours and then inspections every 250 hours or annually, whichever comes first. The key maintenance points are:

Raw water pump impeller: inspect annually and replace every 2 years or 500 hours. It is the part that prevents the most serious failures: a broken impeller leaves the engine without cooling within minutes, and the rubber fragments end up blocking the heat exchanger.

Zinc anodes: check every season. Replace them once they have lost more than 50% of their volume. In warm water, or where there are galvanic currents on the pontoon, check every 3 months.

Oil, fuel and air filters: at every service. The fuel water-separating filter is critical on a Yanmar: water in the circuit damages the injection pump, the most expensive repair on the engine.

Alternator belt and thermostat: inspect annually, replace every 500 hours or after 3 years. A seized thermostat causes overheating or, conversely, permanent cold running that carbons up the engine.

Genuine and aftermarket: warranty and 24-48 h shipping

We stock genuine Yanmar parts with manufacturer warranty as well as aftermarket alternatives that meet OEM specification and are tested for marine use. Every product page states clearly whether the reference is genuine or aftermarket, along with the engine models it fits.

Shipping in 24-48 h to mainland Spain and the Balearics, 3-5 days to the Canary Islands and the rest of the EU. Orders placed before 14:00 leave the same day. Returns within 14 calendar days, plus technical support by phone and WhatsApp for questions about fitment or parts diagrams.

Frequently asked questions about Yanmar Marine parts

Which Yanmar engine models do you cover?

The whole marine range: GM series (1GM, 1GM10, 2GM, 2GM20, 3GM, 3GM30, 3HM35), YM series (2YM15, 3YM20, 3YM30), JH series (3JH2, 3JH3, 4JH2, 4JH3, 4JH4, 4JH5) and the higher-output 4LH, 4LHA, 6LP, 6LPA, 6LY and 6LYA engines. More than 4,300 references in stock in total.

How do I identify the right reference for my Yanmar?

The most reliable route is the OEM parts number, in the format NNNNNN-NNNNN (for example 128397-42500). If you do not have it, find the engine plate with the full model and serial number: many parts change between sub-versions of the same model. You can also browse our parts catalogue by figure or message us on WhatsApp with the serial number.

How often should the impeller on a Yanmar be replaced?

Inspect annually and replace every 2 years or 500 running hours, whichever comes first. It is the engine's most important consumable: a broken impeller leaves the circuit without cooling within a few minutes and the rubber fragments block the heat exchanger.

What are the service intervals for a Yanmar Marine engine?

First service at 50 hours and then every 250 hours or once a year, whichever comes first. At every service: oil, fuel and air filters. Annually: anodes, alternator belt, thermostat and impeller inspection. Every 500 hours or 2 years: impeller and belt.

Are the parts genuine Yanmar or aftermarket?

We supply both. Genuine parts carry the manufacturer's official warranty. Aftermarket parts meet OEM specification and are tested for marine use. Every product page states clearly which is which, along with the compatible engine models.

How often should the anodes on a Yanmar be changed?

Check them at least once a season and replace them once they have lost more than 50% of their volume. In warm water, in marinas with galvanic currents, or if the boat spends long periods on its berth, it is worth checking them every three months.