Attwood Sahara S750 Automatic Bilge Pump 750 GPH 12V | 4507-7
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Attwood Sahara S750 Automatic Bilge Pump — 4507-7
Part Number: 4507-7 (SKU: 23-45077)
Brand: Attwood
Product Type: Automatic Bilge Pump
System: Marine Bilge / Bilge Dewatering
Flow Rating: 750 GPH (open flow)
Voltage: 12V DC
Outlet: 3/4"
Switch Type: Integrated automatic (mercury-free)
Weight: 0.9 kg
What This Pump Does
The Attwood Sahara S750 (4507-7) is a compact 12V automatic bilge pump that combines pump and automatic switch in one self-contained unit. It removes bilge water without requiring a separate float switch, making it well suited for tight bilge spaces in small to mid-size recreational boats. The snap-off strainer base allows quick cleaning without tools.
Note: The Sahara S750 has been succeeded by the Attwood Sahara MK2 series. If this unit is no longer available, see the Sahara MK2 500 GPH or Sahara MK2 800 GPH as current-generation alternatives.
Compatible Applications
- Small to mid-size 12V DC marine bilge systems
- Applications requiring approximately 750 GPH open-flow capacity
- Installations using 3/4" discharge hose
- Tight bilge spaces where a compact integrated-switch design is preferred
Confirm system voltage, existing hose diameter, mounting space, and required GPH capacity before ordering. Real-world flow will be lower than open-flow rating depending on discharge height, hose length, and routing.
Kit Contents
- Pump body with integrated automatic switch assembly
- Snap-off strainer base
- Wire leads
- Seals
Dimensions & Specifications
- Flow Rate: 750 GPH (open flow)
- Voltage: 12V DC
- Discharge Outlet: 3/4"
- Switch: Integrated automatic, mercury-free
- Weight: 0.9 kg
When to Replace
- Pump no longer runs or activates inconsistently
- Fails to switch on automatically when water is present
- Reduced flow output despite clean strainer
- Abnormal noise during operation
- Damaged or corroded wiring connections
- Cracked pump housing or strainer beyond cleaning
Installation Notes
- Mount low in the bilge sump where water collects, keeping the pump accessible for inspection
- Use marine-grade tinned wiring and proper inline fuse protection
- Match discharge hose to the 3/4" pump outlet and route to avoid kinks or high loops that trap water
- Confirm correct polarity before connecting power
- Test both automatic activation and flow rate after installation
- Clean strainer regularly to maintain flow and automatic switch reliability
Part Number Cross-Reference
- Manufacturer Part Number: 4507-7
- SKU: 23-45077
- Also referenced as: 45077, Sahara S750, S750
Parts Desk Insights
Best use case: The Sahara S750 is a solid choice for smaller bilges where a compact, self-contained automatic pump is preferred over a separate pump-and-float-switch combination. It works best in clean bilges with short, direct discharge hose runs.
Common issues: The most frequent problem is reduced automatic activation caused by debris around the integrated switch — regular strainer cleaning prevents most issues. A second common mistake is undersizing: 750 GPH open-flow drops significantly with discharge height and hose length, so boats with high discharge runs or large bilges may need a higher-capacity pump. Also confirm the 3/4" outlet matches existing hose before ordering.
Related Products
- Attwood Sahara MK2 500 GPH Automatic Bilge Pump 55057
- Attwood Sahara MK2 800 GPH Automatic Bilge Pump 55087
- Attwood Sahara MK2 800 GPH Automatic Bilge Pump 55097
- Attwood Sahara MK2 1200 GPH Automatic Bilge Pump 55127
- Attwood Heavy-Duty Bilge Pump 1700 GPH
- Attwood Heavy-Duty Bilge Pump 2000 GPH 12V
- Whale BE9003 Electronic Automatic Float Switch 12/24V
- Rule 3-Way Bilge Panel Switch 12/24/32V
- Rule 1100 GPH Bilge Pump 12V 29-27DA
- Johnson Pump Marine Cartridge Bilge Pump 32703 — 750 GPH 12V
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.