Crusader Electric Fuel Pump Assembly | OEM 47039 | 5.7L / 7.4L / 8.1L MPI
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Crusader Electric Fuel Pump Assembly — OEM 47039
Part Number: 47039 (Crusader OEM) | Brand: Crusader Marine
Crusader 47039 is a genuine OEM electric high-pressure fuel pump assembly for selected fuel-injected Crusader marine engines. Crusader factory parts manuals identify 47039 as the Electric Fuel Pump Assembly used in both return-style and early returnless fuel systems on applicable 5.7L, 7.4L, and 8.1L engine installations.
Important — system identification required: 47039 is a Pierburg-style pump used in the external pump location. It is not the internally mounted pump used in later Crusader FCC (Fuel Control Cell) systems. Confirm the engine model, serial number, and fuel-system layout before ordering — the pump mounting location differs between return-type and early returnless configurations.
Specifications
- Part Number: 47039
- Brand: Crusader Marine
- Product Type: Electric High-Pressure Marine Fuel Pump Assembly
- Pump Style: Pierburg-style electric fuel pump
- System: Engine fuel delivery — return-type and early returnless configurations
- Approx. Application Period: 1995–2001
- Weight: approx. 1.4 kg / 3 lb
Compatible Applications
Fitment must be confirmed by engine model, serial number, and fuel-system configuration. Documented Crusader applications include:
- Crusader 5.7L fuel-injected MPI engines (return-type fuel system)
- Crusader 7.4L / MP7.4L engines (return-type fuel system) — per MP7.4L factory parts manual
- Crusader 8.1L engines using the early returnless fuel system through serial number 630206 — per MP8.1L factory parts manual
- Related 8.2L applications referenced in the same pump family
Not for use with: Later Crusader MPI engines equipped with FCC (Fuel Control Cell) systems, which use a different internally mounted pump.
Fuel System Configuration Guide
Crusader used 47039 in two distinct mounting locations depending on fuel system type:
- Return-type system: Pump is mounted horizontally behind the engine mount on the engine’s right bank
- Early returnless system: Pump is mounted vertically inside the fuel-cooler assembly on the engine’s left bank
Confirm which layout your engine uses before removal. The pump number is the same for both configurations, but the mounting orientation and surrounding hardware differ.
When to Replace the Fuel Pump
Test fuel pressure and electrical supply before condemning the pump — similar symptoms can result from a clogged fuel filter, failed relay, or wiring fault. Replace the pump when:
- Hard starting or extended cranking with no fuel pressure fault elsewhere
- Engine starts but will not hold fuel pressure at idle or under load
- Loss of power that correlates with low fuel pressure readings
- Intermittent engine shutdown traced to fuel delivery
- Pump does not operate when electrically energized and relay / fuse are confirmed good
- Excessive pump noise during operation
- Confirmed low or unstable fuel pressure after filters and electrical supply have been verified
Installation Notes
- Depressurize the fuel system fully and disconnect battery power before beginning any fuel system work
- Follow Crusader’s fuel-system service procedure for the applicable engine and system type
- Inspect all fuel fittings, sealing O-rings, mounting hardware, and fuel lines during replacement — Crusader parts documentation identifies separate sealing O-rings and fittings surrounding the 47039 pump installation
- After installation, cycle the ignition several times to prime the system before cranking
- Inspect all connections and fittings carefully for fuel leaks before operating the vessel
- Verify fuel pressure meets the applicable Crusader service specification under cranking and running conditions before returning the vessel to service
- Professional marine engine service is recommended for fuel system work
Cross-Reference Part Numbers
- Crusader OEM: 47039 / CRU47039 / CRU-47039
- Note: Pierburg manufacturer numbers associated with historical 47039 applications vary between pump versions. The Crusader 47039 reference and the physical fuel-system configuration are the primary fitment identifiers.
Related Products
- Crusader Damper Plate 302/351 | SAE #0 / BorgWarner | OEM Part R140001 — OEM Crusader drivetrain component
Parts Desk Insights
Best use case: 47039 is the correct high-pressure pump for Crusader MP7.4L and early MP8.1L engines (through serial 630206) that are showing fuel delivery symptoms and have the external Pierburg-style pump — not an FCC-equipped later engine. At this price point it’s a genuine OEM assembly, which matters on fuel-injected marine engines where aftermarket pump quality can vary significantly and a pump failure underway is a serious situation.
Common issues: The most frequent ordering mistake is not identifying the fuel system type first. Later Crusader MPI engines with the FCC (Fuel Control Cell) use a completely different internally mounted pump — ordering 47039 for an FCC engine will result in a part that does not fit. Always confirm the engine serial number against the appropriate Crusader parts manual before ordering. The second issue is skipping fuel pressure testing and replacing the pump based on symptoms alone — a failed relay, blown fuse, corroded connector, or clogged pre-filter can produce identical symptoms at a fraction of the cost, so a pressure and electrical check first is always worth the time.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.