Sea-Dog Telescoping Inboard Motor Flusher — 15-1/2" to 24-1/2" — Rubber & Aluminum — 521550
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Sea-Dog Telescoping Inboard Motor Flusher — 15-1/2" to 24-1/2" — 521550
Flush your inboard engine’s cooling system quickly and easily without launching the boat. The Sea-Dog Telescoping Inboard Motor Flusher fits a molded rubber cup over the hull water intake, connects to a standard garden hose, and uses an adjustable aluminum leg to seal the cup firmly against the hull — delivering a thorough freshwater flush that removes salt, sand, minerals, and other contaminants from the cooling system.
Key Features
- Telescoping aluminum leg adjusts from 15-1/2" to 24-1/2" to fit a wide range of hull configurations
- Molded rubber cup seals over the hull water intake for an effective flush
- Connects to any standard garden hose — no tools required
- Flushes salt, sand, minerals, and contaminants from the inboard cooling system
- Suitable for winterizing, tune-ups, and out-of-water maintenance
Specifications
- Telescoping range: 15-1/2" to 24-1/2"
- Construction: Molded rubber cup, aluminum leg
- Connection: Standard garden hose
- Weight: 463g
Compatibility
Designed for inboard engines with a hull-mounted water intake. The telescoping leg accommodates a range of hull depths and intake positions. Verify that your hull water intake configuration is compatible with a rubber cup flusher before ordering.
Parts Desk Insights
Best use case: The telescoping inboard flusher is the right tool for inboard engine owners who need to run freshwater through the cooling system on the trailer or in the yard — without the need for a hose at the right height or a purpose-built flush port. The adjustable leg makes it versatile across different hull depths and intake locations, which is particularly useful for service shops working on a variety of inboard vessels. Essential for saltwater boaters at the end of every outing and for winterizing before storage. Unlike outboard ear muffs, this tool is designed specifically for hull-mounted inboard water intakes — confirm your intake style before ordering.
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.