Outboard Maintenance Kit – Fits Mercury/Mariner 4-6 HP 4-Stroke (Replaces 8M0120836, 3GR-87500-0)
Outboard Maintenance Kit – Fits Mercury/Mariner 4-6 HP 4-Stroke (Replaces 8M0120836, 3GR-87500-0)

Outboard Maintenance Kit – Fits Mercury/Mariner 4-6 HP 4-Stroke (Replaces 8M0120836, 3GR-87500-0)

Vendor: JLM Marine
Availability: In Stock
Product Type: Water Pump Impeller Kit
$42.50
$51.00
$42.50
Subtotal: $42.50

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Outboard Maintenance Kit – Fits Mercury/Mariner 4-6 HP 4-Stroke (Replaces 8M0120836, 3GR-87500-0)

Outboard Maintenance Kit – Fits Mercury/Mariner 4-6 HP 4-Stroke (Replaces 8M0120836, 3GR-87500-0)

$51.00 $42.50
Outboard Maintenance Kit – Fits Mercury/Mariner 4-6 HP 4-Stroke (Replaces 8M0120836, 3GR-87500-0)

Outboard Maintenance Kit – Fits Mercury/Mariner 4-6 HP 4-Stroke (Replaces 8M0120836, 3GR-87500-0)

$51.00 $42.50
Descripción

Outboard Maintenance Kit – Fits Mercury/Mariner 4-6 HP 4-Stroke (Replaces 8M0120836, 3GR-87500-0)

This comprehensive maintenance kit is designed for Mercury and Mariner 4HP, 5HP, and 6HP 4-Stroke outboard motors. It provides all the necessary components for your routine 300-hour service interval.

This kit is a direct replacement for Mercury/Mariner part numbers 8M0120836 and 3GR-87500-0.

  • Includes engine-specific replacement components for a complete service.
  • Designed for gasoline-fueled 4-stroke engines.
  • Contains all parts needed for the recommended 300-hour service interval.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
Mercury/Mariner 8M0120836
Mercury/Mariner 3GR-87500-0

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Brand Model Rated HP Stroke OEM Part No. Notes
Mercury/Mariner 4HP 4 4-Stroke 8M0120836 Serial numbers 0R411838 and above
Mercury/Mariner 5HP 5 4-Stroke 8M0120836 Serial numbers 0R411838 and above
Mercury/Mariner 6HP 6 4-Stroke 8M0120836 Serial numbers 0R411838 and above

Technical Specifications

Specification Value
Product Type Outboard Maintenance Service Kit
Installation Engine-specific replacement components
Fuel Type Gasoline
Housing Material Multiple materials (Neoprene impeller)
Weight 0.045 kg (0.1 lb)
Other Technical Attributes 300-Hour service interval maintenance kit

Package Contents

  • 1 x Water Pump Impeller (47-16154-3)
  • 1 x Cotter Pin (8150264)
  • 1 x Pin Key (28-16155)
  • 1 x Thermostat (804540)
  • 1 x Thermostat Gasket (27-8M0214960)
  • 1 x O-Ring (25-16131)
  • 1 x Oil Seal (16130/26-16130)
  • 1 x Fuel Filter (35-8M0157133)
  • 1 x Gaskets (8035161)
  • 2 x Drain Gasket (27-95220)

Installation Guide

  1. Ensure the engine is off and the battery is disconnected for safety.
  2. Access the lower unit to service the water pump; remove the old impeller, seals, and key.
  3. Install the new water pump impeller (47-16154-3) and related seals.
  4. Locate and replace the thermostat (804540) and its gasket.
  5. Find the existing fuel filter and replace it with the new fuel filter (35-8M0157133).
  6. Replace the oil drain screw gaskets during your oil change.
  7. Reassemble all components securely.
  8. Reconnect the battery and start the engine to check for proper function and leaks.

Troubleshooting & FAQ

Q: How do I confirm this fits my engine?

A: This kit is specifically for Mercury/Mariner 4HP, 5HP, and 6HP 4-stroke outboard motors with serial numbers 0R411838 and above. Please verify your engine model and serial number before ordering.

Q: How often should I perform this service?

A: This is a 300-hour service kit, intended for routine maintenance as recommended by the manufacturer to maintain engine performance and reliability.

Q: What are the signs I need to replace these parts?

A: Common indicators include engine overheating (impeller failure), poor fuel delivery or stalling (clogged fuel filter), or inconsistent engine temperature (faulty thermostat). Regular service prevents these issues.

Q: OEM vs. Aftermarket?

A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?

A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?

A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is an aftermarket replacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.
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Podemos enviar a prácticamente cualquier dirección del mundo con envío gratuito disponible para la mayoría de las regiones.

Para nuestros clientes típicos de EE. UU. y Canadá , nuestros plazos de envío son los siguientes:

  • Amazon FBA : los pedidos se entregarán dentro de 1-5 días hábiles después de realizar el pedido (durante ciertos períodos especiales como promociones importantes, Navidad, etc., el tiempo de entrega de Amazon FBA puede verse afectado).
  • Envío al almacén de EE. UU .: los pedidos se entregarán dentro de los 7 días posteriores a la realización del pedido.
  • Envío al almacén de China : los pedidos se entregarán aproximadamente 12 días después de realizar el pedido.

Al realizar un pedido, estimaremos las fechas de envío y entrega según la disponibilidad de sus artículos y las opciones de envío que elija. Dependiendo del proveedor de envío que elija, las fechas de envío estimadas podrían aparecer en la página de presupuestos de envío.

Tenga en cuenta también que las tarifas de envío de muchos de los artículos que vendemos se basan en el peso. Puede consultar el peso de cada artículo en su página de detalles. Para reflejar las políticas de las empresas de envío que utilizamos, todos los pesos se redondearán a la libra superior.

Acerca de JLM Marine

Fundada en 2002, JLM Marine se ha consolidado como un fabricante dedicado de piezas marinas de alta calidad, con sede en China. Nuestro compromiso con la excelencia en la fabricación nos ha ganado la confianza de las principales marcas marinas a nivel mundial.

Como proveedor directo, evitamos intermediarios, lo que nos permite ofrecer precios competitivos sin comprometer la calidad. Este enfoque no solo promueve la rentabilidad, sino que también garantiza que nuestros clientes reciban el mejor valor directamente del proveedor.

Estamos entusiasmados de ampliar nuestro alcance a través de canales minoristas, llevando nuestra experiencia y compromiso con la calidad directamente a los propietarios de embarcaciones y entusiastas de todo el mundo.

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