JDMSPEED High-Pressure Electric Fuel Pump PH500-M014 for Mercruiser V6/V8 EFI — Direct-Fit Non-Threaded Outlet

JDMSPEED High Pressure Electric Fuel Pump PH500-M014 is a direct-fit replacement for Mercruiser EFI/MPI V6 and V8 marine engines, restoring reliable high-pressure fuel delivery for models using part numbers 861156A1, 807949A1, 18-35433, 9-35433 and equivalents.

This electric fuel pump is engineered for fuel-injected marine applications—compatible with Mercruiser and GM V6/V8 engines such as 305, 350, 377, 454, 502 and others that use a non-threaded small outlet 'cool fuel' assembly. It supplies the pressurized fuel needed for EFI combustion systems, fits common replacement part numbers (861156A1, 807949A1, PH500-M014, E11004), and is built as a 100% new unit to help bring back steady starting and consistent engine performance on boats.

Will this pump fit my Mercruiser or GM fuel-injected engine?

This JDMSPEED pump is intended as a drop-in or near drop-in replacement for many common Mercruiser EFI and MPI installations that originally used part numbers listed above. Verify that your engine uses the 'cool fuel' style assembly with a non-threaded small outlet before ordering.

• Compatible with Mercruiser 861156A1 and 807949A1 replacements
• Fits GM V6/V8 EFI engines: 305, 350, 377, 454, 502
• Designed for assemblies with non-threaded small outlet (cool fuel)
• Check physical connector and mounting for final fitment

How does the JDMSPEED pump support fuel-injection performance?

High-pressure delivery is essential for fuel injectors to atomize gasoline properly. This pump maintains the required pressure range for EFI systems, helping ensure stable fuel flow under load and during start-up without depending on a mechanical pump.

• Provides steady high-pressure fuel flow for injectors
• Helps improve cold starts and consistent RPM response
• Replaces worn pumps that cause pressure loss or lean conditions
• Electric operation reduces mechanical wear compared to older systems

What should I check before installing this replacement pump?

Confirm electrical connectors, fuel line sizing, and the small outlet style before installation. Because this unit is for the cooler assembly with a non-threaded outlet, confirm whether your existing pump's outlet is threaded or not to avoid mismatch.

• Verify outlet type: non-threaded for cool fuel assemblies
• Match electrical connector polarity and fuse protection
• Inspect fuel lines and clamps for secure, leak-free connections
• Compare mount points for a proper physical fit before final installation

How durable and reliable is this JDMSPEED replacement pump?

Built as a new aftermarket component, this pump is manufactured to restore dependable pressurized fuel delivery. While not an OEM-labeled item, it replaces standard aftermarket part numbers and is intended for marine environments when installed with correct hoses, filters, and electrical protection.

• 100% new unit designed for marine EFI applications
• Replaces several OEM and aftermarket part numbers for compatibility
• Recommended to use with clean fuel and inline filters for longevity
• Follow marine wiring best practices and corrosion protection

Who is this for? Boaters, marine mechanics and DIY enthusiasts who own Mercruiser or GM fuel-injected V6/V8 engines and need a high-pressure electric replacement pump compatible with 'cool fuel' assemblies will find this JDMSPEED PH500-M014 suitable. Choose this unit if your engine references part numbers like 861156A1, 807949A1, 18-35433, 9-35433 or E11004 and you require a new, high-pressure electric pump to restore reliable fuel delivery. Always confirm fitment, outlet style, and electrical compatibility before purchase, and replace fuel filters and clamps as part of the service for best results.