Skip to product information
SKU:
NLT1Z00298
Ships for free in 2–4 business days.
Onan MEP-802A MEP-803A Water Pump 186-6178 186-6714 with Gaskets
$121.99
In Stock
$121.99
Sale price
$121.99
Regular price
This engine water pump with two gaskets replaces 186-6178 and 186-6714 on compatible Onan-powered MEP-802A and MEP-803A military generator sets.
Estimated delivery between
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
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
- MEP-802A tactical quiet generator with compatible Onan engine
- MEP-803A tactical quiet generator with compatible Onan engine
Product Overview
Coolant at the pump weep hole, bearing noise, shaft play, or rising temperature under electrical load can identify a failed water pump. Replacing it before the engine overheats protects the head gasket, cylinder head, and generator readiness.
The pump circulates coolant through the engine and radiator during long stationary operation. The included gaskets support installation, but hoses, thermostat condition, belt tension, radiator flow, and the correct coolant mixture should be checked at the same time.
Key Features & Performance
- Water pump for liquid-cooled military generator engines
- Includes two installation gaskets
- Crosses to 186-6178 and 186-6714
- For MEP-802A and MEP-803A applications
- New aftermarket pump
Replaces Part Numbers
- 186-6178
- 186-6714
Common Uses
- Stopping coolant leakage at the pump body or shaft
- Replacing a noisy or loose water-pump bearing
- Restoring circulation when the engine overheats under sustained load
Technical Specifications
- Product Type: Engine Water Pump
- Primary Application: Onan-powered military generator sets
- Package Quantity: 1 water pump and 2 gaskets
- Condition: New
- Replacement Type: Aftermarket
- References: 186-6178; 186-6714
- Package: 1 pump; 2 gaskets
- System: Engine cooling
- Application: MEP-802A / MEP-803A generator
- Condition: New aftermarket
Installation & Fitment
- Let the generator cool and disconnect starting power
- Drain and contain the coolant
- Clean gasket surfaces without gouging the housing
- Refill, bleed air, set belt tension, and load-test while watching temperature and leaks
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.
Model, production date, serial number, connector, dimensions, installed options, and previous repairs can affect fitment. Compare the original component and reference information before purchase.
Frequently Asked Questions
Q: Does the package include gaskets? A: Yes. The researched package includes one pump and two gaskets.
Q: Can a clogged radiator cause the same overheating? A: Yes. Confirm airflow, radiator flow, thermostat operation, belt drive, and coolant level before blaming the pump.
Q: How do I confirm this is the correct part? A: Compare 186-6178 or 186-6714, pump casting, pulley or hub, bolt pattern, hose connection, and generator engine identification.
Q: Is this supplied by the original equipment manufacturer? A: No. This is a new aftermarket item. Brand, model, and part numbers are used only to identify compatible applications.
Part Summary
keywords: Onan 186-6178 water pump, 186-6714 generator pump, MEP-802A cooling repair, MEP-803A water pump, military generator pump gaskets
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.