Jabsco Flexible Impeller, 3-3/4 x 3-1/2 x 1 in, Spline Drive, 12 Blades, Neoprene, Brass Insert

Overview

The Jabsco 17936-0001-P is a neoprene replacement impeller kit for compatible bronze flexible impeller pumps used in engine cooling, bilge, transfer, and general water service on board. It uses a spline-drive hub with a brass insert and a 12-blade impeller profile measuring 3-3/4 in in diameter, 3-1/2 in in depth, and 1 in at the shaft.

For boat owners trying to confirm fit, the important details are the blade count, hub style, outside diameter, depth, and shaft size. This impeller matches Jabsco profile Q and size 270, which helps when you are checking pump service data or comparing the old impeller during a maintenance swap.

This is the kind of part that is easy to overlook until cooling water flow drops or the pump loses prime. Keeping the correct spare on board is practical maintenance, especially on older diesel installations and boats that spend long hours under power.

Key features

• 12-blade neoprene impeller with a spline-drive brass hub
• 3-3/4 in outside diameter, 3-1/2 in depth, and 1 in shaft size for Q profile and size 270 applications
• Fits compatible bronze flexible impeller pumps used for engine cooling, bilge, transfer, and general water duties
• Brass insert at the hub for the drive connection
• Useful as both a scheduled service replacement and an onboard spare for emergency pump maintenance

Compatibility and fit

Before ordering, match the old impeller or the pump service data to the full set of fit points: 12 blades, spline-drive hub, 3-3/4 in outside diameter, 3-1/2 in depth, and 1 in shaft size. That check matters on repowered boats, older engine rooms, and pumps that may have been changed from the original installation at some point.

This impeller is a good match for owners maintaining compatible mechanical water pumps where the exact impeller profile matters more than a broad engine brand reference. On workboats, cruising boats, and sportfishing setups alike, a correct impeller fit is what keeps pump output where it should be.

Installation and service

Routine impeller changes are straightforward on pumps with an accessible end cover. Greasing the new impeller before installation helps it slide into the bore and gives added protection during the first dry moments before the pump fully primes.

When removing the old impeller, grip the hub with the proper removal tool or pliers rather than prying with screwdrivers, which can mark the pump body and lead to sealing problems. Replacing impellers on a set schedule, and carrying a spare aboard, is a simple way to avoid cooling trouble that starts with one small wear item.

Shipping
We ship worldwide from the United States. Rates are calculated at checkout based on destination and package weight. Some items include free shipping, which will show automatically. Not every product is eligible for international shipping; checkout will confirm eligibility. We do not ship to PO Boxes except through USPS, and not all packages qualify.

Processing and dispatch
Most orders are verified, packed, and handed to the carrier within 1 to 2 business days. Some products may need extra handling time or ship directly from the manufacturer. For certain international orders, inventory transfers between warehouses may add time. If any delay is expected, we will let you know the dispatch date.

Delivery and tracking
Deliveries are handled by trusted carriers such as USPS, UPS, FedEx, and DHL. Estimated arrival times appear at checkout and depend on your location and the service you choose. These are estimates and can be affected by customs or carrier disruptions. A shipping confirmation with a tracking link is emailed when your order ships, and tracking may take up to 24 hours to update. You can also view tracking in your account.

Duties, taxes, and support
International customers are responsible for any customs duties, taxes, and fees charged by the destination country. If these charges are refused and a shipment returns to us, the carrier’s return cost and any re-entry customs fees will be deducted from the refund. If your order is late or you need help, contact cs@qualityboatparts.com and we will assist you.

Quality Boat Parts is a reseller. Many items include a manufacturer’s warranty, and all warranty service is handled directly by the manufacturer. We do not manage or administer warranty claims on behalf of customers.

Warranty terms, coverage, and duration are set by each manufacturer. Issues involving defects, repairs, or replacements must be addressed with the manufacturer’s support team. When available, the warranty period is listed on the product page. If it is not shown, contact us or the manufacturer for details before purchasing.

To start a claim, the customer must contact the manufacturer and follow their process. Keep your proof of purchase and original packaging, and register the product if the manufacturer requires it, as these are often needed for warranty service.

We are happy to help you find the right contact or documentation, but we cannot decide outcomes or intervene in claim resolutions. For guidance, email cs@qualityboatparts.com.