Jabsco 9990-41 Bronze Engine Cooling Pump
If you're keeping an older Perkins-powered boat running smoothly, the Jabsco 9990-41 is the kind of part that quietly does its job for years without asking for attention. This bronze, flange-mounted cooling pump is built to move raw water through your engine efficiently, and its self-priming design means it gets to work fast without any fuss during startup. The bronze housing resists corrosion in both fresh and saltwater environments, so it holds up well even in demanding marine conditions where lesser materials would wear down quickly.
Inside, a flexible neoprene impeller does the heavy lifting, pushing water through the system while a stainless steel shaft keeps everything running true and resists the kind of pitting and wear that can shorten a pump's life. The 3/4" NPT threaded ports make plumbing straightforward, and the flange mount configuration is a direct match for engines that already use this bolt pattern, which takes a lot of the guesswork out of installation or replacement.
This pump is a well-known fit for Perkins 6.354, M200, M240, and M275 engines, and it also serves as a direct replacement for the earlier Jabsco 9990-21 model, so upgrading from that older unit is generally a straightforward swap. Owners doing this kind of maintenance often pick up a spare neoprene impeller kit at the same time, since impellers are wear items and having one on hand can save a trip mid-season.
Key Features
- Self-priming operation for fast, reliable startup
- Bronze pump body resists corrosion in fresh and saltwater
- Flexible neoprene impeller for efficient water circulation
- Stainless steel shaft for long-term durability
- Direct replacement for the Jabsco 9990-21 pump
- Barrel-style housing designed for secure flange mounting
Applications
- Marine engine raw water cooling systems
- Perkins 6.354, M200, M240, and M275 diesel engines
- Fresh water and saltwater circulation systems
- Commercial and recreational vessel engine cooling
Specifications
- Pump Body Material: Bronze
- Impeller Material: Neoprene
- Shaft Material: Stainless steel
- Mount Type: Flange (barrel-style housing)
- Pump Size: 40
- Port Size: 3/4" NPT (19 mm)
- Port Type: NPT threaded, female
- Priming: Self-priming
FAQs
Q: Is the Jabsco 9990-41 a direct replacement for the 9990-21 pump?
A: Yes, the 9990-41 is designed as a direct replacement for the earlier Jabsco 9990-21 cooling pump.
Q: Which engines commonly use the Jabsco 9990-41?
A: It's standard equipment on the Perkins 6.354 and is also used on the M200, M240, and M275 engine models.
Q: Can this pump handle both fresh water and saltwater?
A: Yes, the bronze construction is anti-corrosive and suited for both fresh water and saltwater circulation.
Q: Should I buy a spare impeller with this pump?
A: It's a good idea, since the neoprene impeller is a wear item and keeping a spare on hand helps avoid downtime.
Q: What size ports does the 9990-41 use?
A: It has 3/4" NPT threaded female ports on a flange-mounted, size 40 pump body.
CLRMarine
