Fynspray 65mm Eight-Blade Replacement Marine Impeller for RWB79A 3/4in Pump RWB79B

Fynspray 65mm Eight-Blade Replacement Marine Impeller for RWB79A 3/4in Pump

This Fynspray replacement flexible impeller is the service component listed for the RWB79A 3/4 inch pump. It has eight blades, a 65mm overall diameter, 51mm depth and a 16mm shaft hole, with a half forward keyway drive. These dimensions and the drive arrangement are important when matching an existing pump. The 3/4 inch description identifies the associated pump size; it is not the impeller diameter or shaft-hole measurement. This listing is for the impeller rather than a complete pump.

Choosing and using this product

Before ordering, identify the pump model and compare the old impeller with the listed dimensions. Check the shaft connection carefully, because impellers with a similar diameter and depth can use different drive inserts. In particular, the catalogue distinguishes this keyed RWB79B impeller from the oval-insert RWB2675 used with a different pump. Do not substitute one solely because the general blade arrangement looks similar in a photograph.

An impeller replacement is an opportunity to inspect the pump as a complete assembly. Check the cover, internal surfaces and shaft area for wear or damage, and establish why the old impeller needs replacing. If blades have broken away, account for the missing pieces and have the connected water path checked as appropriate before returning the system to use. A new impeller alone may not correct an inlet restriction, a leaking suction connection or a damaged pump housing.

Isolate the drive and manage the connected water supply before opening the pump. Follow the current Fynspray service instructions for removal, fitting, any required assembly lubricant and sealing components. This listing does not establish which additional service items are required for a particular repair. Keep the exact product and pump codes with the maintenance records so later replacements can be matched accurately.

After reassembly, confirm the pump receives its intended liquid supply and inspect for leaks during a controlled operational check. Avoid running a flexible-impeller pump dry. Where it serves engine cooling or another important onboard function, have the repair and restored flow checked by a competent marine technician before normal operation.

Product details

• Product code: RWB79B.
• Brand: Fynspray.
• Replacement impeller for RWB79A 3/4 inch pump.
• Blade count: 8.
• Overall diameter: 65mm.
• Depth: 51mm.
• Shaft hole diameter: 16mm.
• Drive: half forward keyway.