Johnson Pump Marine Cartridge Bilge Pump 32703 – 750 GPH, 12V
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Johnson Pump Marine Cartridge Bilge Pump – 750 GPH, 12V
Part Number: 32703
Brand: Johnson Pump Marine
Product Overview
The Johnson Pump 32703 is a compact 12V cartridge-style bilge pump rated at up to 750 GPH in straight-flow conditions. Its removable motor/impeller cartridge allows the pump to be serviced or cleaned without removing the base from the bilge — ideal for boats where bilge access is limited. Water-cooled motor and ISO 8849 certified for marine use.
- Voltage: 12V DC
- Max capacity: 750 GPH at straight flow
- Discharge connection: 3/4 inch (Dura-Port)
- Includes straight and 90° Dura-Port discharge fittings
- Includes removable check valve
- Tool-free cartridge removal for maintenance
- Water-cooled motor
- Meets ISO 8849 marine requirements
Compatible Applications
- Recreational powerboats and day cruisers
- Fishing vessels and center consoles
- Sailboats and small to mid-size vessels
- Any 12V marine installation requiring a compact, serviceable 750 GPH bilge pump
Fitment Note: Confirm 12V electrical system, adequate bilge mounting space, and a compatible 3/4-inch discharge hose. A separate float switch or bilge pump controller is required for automatic operation — not included.
When to Replace or Service
- Noticeable reduction in pumping flow
- Motor runs intermittently or fails to start
- Impeller is visibly worn or damaged
- Pump no longer reliably clears bilge water
The cartridge can be removed and inspected without pulling the pump base — check the cartridge first before replacing the full unit.
Installation Notes
- Mount at the lowest practical point in the bilge
- Route the discharge hose to minimize restrictions and vertical lift
- Use appropriate fusing and marine-grade electrical connections
- Test operation and inspect all hose connections after installation
Related Products
- Johnson Pump 28572 – 750 GPH Spare Motor for Cartridge Pump
- Johnson Pump 28512 – 1000/1250 GPH Spare Motor for Cartridge Pump
- Johnson Pump 22702 Proline 750 GPH Bilge Pump, 12V
- Johnson Pump 32903 Cartridge Bilge Pump – 1000 GPH, 12V
- Johnson Pump Cartridge Combo – Auto Bilge Pump with Electronic Float Switch, 12V
- Automatic Float Switch – 12V/24V 15A Bilge Pump Control
- Seachoice Universal Automatic Marine Bilge Pump Float Switch – 6–32V
Parts Desk Insights
The 32703 is a solid mid-range bilge pump for boats where a 1000 GPH unit is more than needed. The tool-free cartridge is the key maintenance advantage — customers appreciate not having to pull the base during seasonal service. Most common issues: customers forgetting a float switch (sold separately) and occasional confusion between the 750 GPH cartridge (32703) and the Proline 750 (22702) — both are 750 GPH 12V units but with different housing designs. For service, the 28572 spare motor handles the majority of repair cases without replacing the full pump.
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.