Jabsco Impeller Kit, 3-3/4 in x 2-1/2 in x 1 in, 9-Blade, Neoprene, Spline Drive

Overview

The Jabsco 836-0001-P is a 9-blade neoprene impeller kit for flexible impeller pumps that use a 3-3/4 inch outside diameter, 2-1/2 inch depth, and a 1 inch spline-drive hub. It uses a brass insert at the hub and suits common marine pump duties such as engine cooling and water transfer.

On a boat, the fit comes down to the impeller measurements and drive style more than the pump brand on the casting. This kit is a practical match when your existing impeller has the same diameter, depth, blade count, and spline-drive hub. Neoprene is the usual material for raw-water cooling circuits and for fresh or salt water transfer where the liquid does not carry heavy oil contamination.

Key features

• 9-blade neoprene impeller for engine cooling and water transfer service
• 3-3/4 inch outside diameter and 2-1/2 inch depth for pumps built around this impeller size
• 1 inch spline-drive hub with brass insert
• Kit format includes the service parts commonly replaced during an impeller change
• Useful both for scheduled maintenance and as a spare kept on board for loss of cooling flow

Compatibility and fit

This impeller is used in flexible impeller pumps found on many marine engine cooling and general water-transfer setups. Before ordering, compare the old impeller or the pump service data for four points: 3-3/4 inch diameter, 2-1/2 inch depth, 9 blades, and a 1 inch spline-drive hub. That check matters more than a visual match alone.

This is a good fit for boat owners servicing a raw-water pump in a coastal cruiser, sportfisher, workboat, or sailboat where dependable cooling water flow matters. It also makes sense as a spare for longer runs, since an impeller failure can stop cooling water flow without much warning.

Installation and service

When replacing the impeller, grease the new vanes before installation so it slides into the pump bore more easily and has protection during the first prime. Remove the old impeller by gripping the hub with the proper puller or pliers rather than prying against the pump body, which can mark the housing and lead to leaks.

Impellers are wear items, so routine inspection and replacement are part of normal engine-room maintenance. On boats that run often or see sandy, silty, or warm water, keeping a spare kit on board can save a trip that would otherwise end at the dock.

What’s included

• Impeller
• Gasket
• Spline seal
• Lubricant

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

Learn more.

Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

Learn more.

Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

Learn more.