Product Overview

This is a premium quality replacement plunger, part number 129506-51100, engineered specifically for Yanmar M5 series diesel engines. Designed to meet or exceed original equipment specifications, this critical component is essential for restoring optimal fuel injection performance and engine efficiency. We supply this part globally to major industrial markets, supporting the maintenance and repair of machinery in construction, agriculture, marine, and power generation sectors worldwide.

Key Features & Benefits

• Precision Engineered: Manufactured to exact OEM dimensions and tolerances for a perfect fit and reliable operation within the Yanmar M5 fuel injection system.
• Superior Durability: Crafted from high-grade materials to withstand the high pressures and rigorous demands of diesel engine operation, ensuring long service life.
• Restored Engine Performance: Directly contributes to precise fuel metering and injection timing, helping to restore engine power, fuel efficiency, and smooth operation.
• Rigorous Quality Control: Each part undergoes thorough inspection and testing, supported by machinery test reports and video outgoing-inspection documentation.
• Global Compliance Ready: Packaged and documented for seamless international shipping and customs clearance.

Technical Specifications

OEM Cross-Reference

This high-quality aftermarket plunger directly replaces the following OEM part number:

• Yanmar: 129506-51100

Note: OEM service for custom branding or packaging is available upon request for bulk orders.

Compatibility

This plunger is designed for use in Yanmar M5 series diesel engines. These engines are commonly found in a wide range of heavy-duty applications, including:

• Construction Machinery: Excavators, loaders, compactors
• Industrial & Agricultural Equipment: Tractors, pumps, irrigation systems
• Power Generation (Gensets): Standby and prime power generator sets
• Marine Applications: Auxiliary engines and propulsion for smaller vessels
• Material Handling: Forklifts and other industrial vehicles

Always verify your engine’s model and existing part number before purchase to ensure correct fitment.

Global Supply & Distribution

We are a trusted supplier for B2B clients across the globe. Our streamlined logistics network ensures reliable delivery to key industrial regions:

• Major Markets Served: North America (USA, Canada), European Union (Germany, UK, Netherlands, Poland), Asia-Pacific (Australia, Japan, Singapore, South Korea), Middle East (UAE, Saudi Arabia), and South America.
• Efficient Logistics: We ship via air and sea freight to all major international ports and industrial hubs, offering competitive FOB, CIF, or DAP terms.
• Export Expertise: All documentation (commercial invoice, packing list, certificate of origin) is provided for smooth customs clearance. We have extensive experience complying with international trade regulations.

Quality Assurance

• Manufacturing Standard: Produced in ISO-certified facilities using precision machining and strict quality protocols.
• Warranty: Backed by a 6-month warranty against manufacturing defects from the date of purchase.
• Testing & Inspection: Every batch is subject to dimensional checks and functional validation. A machinery test report is available, and video outgoing-inspection can be provided for quality verification.
• After-Sales Support: Comprehensive online technical support is available post-warranty to assist with installation or application questions.

FAQ

Q: How can I confirm this plunger is the correct part for my specific Yanmar M5 engine?
A: The most reliable method is to cross-reference the part number. Please check the existing plunger or your engine’s parts manual for the number 129506-51100. You can also provide your engine’s full model and serial number to our technical team for verification.

Q: What is included with the part, and how is it packaged for international shipping?
A: The plunger is individually protected in a plastic bag, placed in a secure box, and then packed in a sturdy export carton. This multi-layer packing prevents damage during long-distance transit. All necessary customs and commercial documentation is included with the shipment.

Q: Do you provide any guidance for installation or maintenance of this fuel system component?
A> While we supply the component, installation should be performed by a qualified diesel technician familiar with Yanmar fuel injection systems. Proper cleaning of the injection pump housing, use of clean fuel, and correct torque specifications are critical. We offer online support for general technical inquiries related to the product.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .