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SKU:
NLT2T01335
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Fuel Lift Pump for Yanmar Marine JH Series 4JH 4JH-TH Diesel Engine
$51.69
In Stock
$51.69
Sale price
$51.69
Regular price
This is a fuel lift pump for compatible Yanmar JH-series marine diesel engines, including 4JH and 4JH-TH applications, reference 129158-52101.
Estimated delivery between
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
We do our best to list all compatible models, but equipment can vary by engine, serial number and production configuration. Use the part numbers and fitment details below to confirm your application.
| Equipment / Engine | Compatible Application |
|---|---|
| Yanmar marine engine | 4JH / 4JH-TH |
| Yanmar marine engines | Select 3JH2 / 3JH3 / 3JH4 applications |
| Yanmar marine engines | Select 3YM20 / 3YM30 applications using this pump family |
Product Overview
The feed/lift pump draws diesel from the boat’s fuel supply and delivers it toward the filtration and injection system. Air intrusion, weak pumping action or diaphragm wear can cause hard starting, loss of prime and fuel starvation at higher engine load.
Research for 129158-52101 also links the pump family with several 3JH/3YM and related Yanmar marine applications. Marine installations can differ in hose routing and engine revision, so the engine model tag and original pump number remain the best checks.
Key Features & Performance
- Designed for low-pressure fuel transfer on compatible Yanmar marine diesels
- Reference 129158-52101 for straightforward cross-checking
- Relevant to multiple JH-series configurations, not only a single boat model
- Useful replacement for pumps that leak, lose prime or no longer supply fuel consistently
Specifications
| Reference number | 129158-52101 |
| Part type | Mechanical fuel feed / lift pump |
| Application | Yanmar marine diesel |
Before You Order
Confirm the engine model and pump number on the existing unit. Check line fittings and lever/mounting configuration before installation.
Frequently Asked Questions
Why is a lift pump important on a marine diesel?
It keeps the injection system supplied with fuel and helps maintain prime; a weak pump can become especially noticeable when the engine is asked to run under sustained load.
Is this an OEM part?
This listing is for a replacement component for the applications shown above. Match the reference number, physical configuration and machine or engine details before ordering.