ImpelPro Standard Impeller Puller for Tight Spaces
A compact, bearing-driven impeller removal tool for the raw water pump you can see but can't get your hands around.
Fits flexible-vane impellers 1-9/16" to 2-9/16" on inboard marine engines and generators, measured tip to tip across the vanes. Works with as little as 4.2" of clearance in front of the pump.
Six teeth bite into the hub, and a patented bearing keeps the tool centered while you wind even a stuck impeller out with one hand and a 9/16" wrench. The pump stays on the engine.
Backed by a 7-year limited warranty. Orders are processed within 1 business day.
Not compatible with outboard motors. Not sure of your size? Look up your impeller part number.
Quantity
For the pump in the worst spot on the boat
Changing an impeller should be a quick job. Then you find the pump tucked behind the starter, or down in the generator box with a hose running across the front of it. You're on your side in the bilge with a headlamp on, and there's room for one hand, maybe.
That's usually when the screwdrivers and pliers come out. A stuck impeller tears apart vane by vane, the bronze housing gets scratched up, and if nothing will grip, the pump comes off the engine. A quick job turns into your whole Saturday.
The Standard was built for tight spaces like these. The body is 3.75" tall and the short rod is 4.2", so it fits where there's barely room to work. Snug the arms onto the hub with the knurled thumbscrew, by hand. Put a 9/16" wrench on the hex nut at the top of the threaded rod and turn. The rod works against the pump shaft, the teeth grip harder as the load builds, and the impeller winds out, steady and controlled.
Martin M. used it on a Yanmar 4JH2E with the engine starter blocking the space behind the pump. Joseph W. used to take the water pump off an Onan genset just to change the impeller. Joseph's review of the Standard: "It worked wonderfully. So easy."
The Volvo Penta IPS 600 has a long impeller, and a lot of people end up pulling the whole pump to get it out. Eddie Protzeller did that job with the Standard and left the pump where it was. Eddie's advice on camera: "Don't take the pump off, just the belt." Watch the full Volvo Penta IPS 600 job.
Eddie has spent 15+ years as a tugboat and yacht mechanic. He built ImpelPro because he was tired of watching good housings get destroyed by bad tools.
Who it's for
Boat owners who do their own service. Whether it's the auxiliary diesel on a sailboat or the genset on a cruiser, you don't have to wait for a yard slot to change an impeller. If it's your first time, the how-to video walks you through every step.
Captains and sportfishers. Impellers don't pick a convenient time to fail, and the temperature alarm is usually the first to tell you. With a spare impeller and the Standard in your kit, you can change it at the dock or out on the water instead of calling for a tow.
Workboat and fleet operators. A boat waiting on a pump job isn't earning. With the Standard, one crew member and a 9/16" wrench can change the impeller without taking the pump off. Eddie has used the same Standard on a 1980s Hino and on a Volvo Penta IPS 600. See ImpelPro for Marine Professionals.
Marine mechanics. Designed by one. It handles the cramped pumps without chewing up your customer's housing.
Why it works
- Six teeth on the hub. They bite into the hub itself, so the tool doesn't have to reach under the end of the impeller to catch it.
- A patented, bearing-driven design. The bearing keeps the puller centered on the shaft and gives you the leverage to wind the impeller out with one hand. No yanking, no prying.
- Small enough for the tight ones. 3.75" tall, with a 4.2" short rod.
- Billet aluminum and stainless. The arms and strong back are machined out of a solid piece of 6061-T6 aluminum, called billet. The threaded rod is 316L stainless steel. Both resist corrosion around salt water.
- Fits keyed, threaded and splined shafts.
Specs and compatibility
- Impeller size: 1-9/16" to 2-9/16", measured tip to tip across the vanes, not across the hub. If yours is exactly 2-9/16", this is your size.
- Clearance needed: 4.2" minimum
- Rods included: 4.2" short rod and 6.2" medium rod
- Teeth: 6
- Body: 3.75" tall, 3.0" strong back, 1.5" thumbscrew
- Weight: 12 oz
- Tools: 9/16" wrench or socket on the hex nut at the top of the threaded rod. The thumbscrew is hand-tighten only.
- Pumps: any flexible-vane impeller pump in this size range, including inboard engine raw water pumps, generators, and RSW, washdown and transfer pumps
- Shafts: keyed, threaded and splined
- Not compatible with outboard motors
- Materials: 6061-T6 billet aluminum, machined from solid, and 316L stainless steel
- Origin: Made in USA of US and imported parts
- Patent: U.S. Patent No. 12,467,478
- Warranty: 7-year limited warranty
- In the box: puller body, knurled thumbscrew, short rod, medium rod. Instructions and videos are on the QR code printed on the package.
Look up your impeller part number and see full specifications
How to use it, step by step
Warning California Proposition 65 This product can expose you to chemicals, including nickel, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov
Need the other size?
If you have bigger pumps on board too, the ImpelPro Large fits 2-9/16" to 4-5/8" impellers. It has nine teeth, plus 6.2" and 7.2" rods for pumps that sit deeper. Shop the ImpelPro Large.
Before your first job
- Have a new impeller ready. The teeth bite into the hub to get their grip, so the old impeller is done once it's out.
- Measure tip to tip across the vanes, not across the hub. That number picks your size.
- Tighten the thumbscrew by hand only. Pliers, vise grips or a wrench on the thumbscrew, strong back or arms can damage the tool, and it voids the warranty. Your 9/16" wrench goes on the top nut only.
- Watch the how-to video once before you start, and pay close attention to the centering step. If the tool sits off-center, it won't wind the impeller out and it can damage the tool.
Common questions
Which size do I need?
Measure your impeller tip to tip across the vanes. 1-9/16" to 2-9/16" takes the Standard. Over 2-9/16", up to 4-5/8", takes the Large. If you can't get to it yet, look up your impeller part number on our compatibility list.
Will it work on my engine?
It goes by the pump, not the engine brand. If your pump uses a flexible-vane impeller in this size range and you have at least 4.2" of clearance, the Standard will fit. Search our compatibility list by impeller part number to be sure.
Does it work on generators, washdown and RSW pumps?
Yes, as long as the pump uses a flexible-vane impeller in this size range. That includes inboard engine raw water pumps, generators, and RSW, washdown and transfer pumps. It doesn't work on centrifugal, gear or diaphragm pumps.
Can I reuse the impeller after I take it out?
No. The teeth bite into the hub to grip it, so plan on a new impeller. ImpelPro recommends a new one every 100 hours, every season, or on your manufacturer's schedule, whichever comes first.
What tools do I need?
Just a 9/16" wrench or socket for the top nut. The thumbscrew tightens by hand.
What's the warranty?
7 years, limited, against defects in materials and workmanship. See the full warranty policy.
ImpelPro Policies
About This Video
Watch the ImpelPro Large Impeller Puller wind a worn impeller out of the raw water pump on a Cummins 5.9 marine diesel. A hose runs right across the front of the pump, and the pump stays on the engine the whole time.
Video description (music only, no narration): The video opens on the raw water pump with the cover off and a hose crossing in front of it. Eddie sets the puller on the impeller hub and tightens the knurled thumbscrew by hand. A socket on the top nut winds the threaded rod against the pump shaft, and the impeller winds out of the housing. The video ends on the old impeller, still gripped in the tool, with its vanes torn up.