Johnson Pump 28512, 1000/1250 GPH Spare Motor For Cartridge Pump
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Restore or upgrade your Johnson Pump cartridge bilge pump to 1000 or 1250 GPH in minutes by swapping the motor cartridge. The universal housing design supports GPH upgrades without replacing the entire pump, and the snap-out impeller makes debris cleaning fast and simple.
- Fits Johnson Pump aerators, bilge, low boy, twinport, and shower sump pumps
- Universal pump housing allows upgradeable GPH output
- 1000/1250 GPH output at 12V — highest output in the spare motor series
- Replacement motor cartridge — no full pump replacement needed
Parts Desk Insight — Best Use
The 28512 is the go-to cartridge motor for boats with larger bilge volumes or faster water ingress — think cruisers, sportfishers, and any vessel where a 500–750 GPH pump has struggled to keep up. If a customer already has a Johnson cartridge pump housing installed, this is the fastest and most cost-effective path to higher capacity: swap the motor, keep the plumbing. Also ideal as a proactive upgrade before a season of heavy use or offshore passages.
Johnson Pump Spare Motor Series
Compatible Cartridge Pump Housings
Compatible Port Fittings
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 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.