How To Change Water Pump On Johnson 25 Hp Outboard

DIY – 1985 to 2005 Johnson Evinrude Lower Unit Water Pump Service

1.Inspect the water tubes to ensure that they are clean and free of impediments. 2.Apply lubricant to the grommets on the water tube pickups. Make that the lower unit is properly aligned with the top exhaust housing, and that the drive shaft is inserted into the appropriate guide hole while simultaneously guiding the water tube into the rubber grommet on the water pump housing. When the driveshaft reaches the bottom of the power head, twist the flywheel to bring the splines on the powerhead into alignment with the splines on the driveshaft.

At this point, do not tighten any of the hardware.

6.Put the shift rod in reverse and drop the rod into the bottom nut to secure it.

Make certain that you do not strip the threads.

9.Reinstall the water pickup screens if they have been removed.

How to Replace an Evinrude Impeller 25 HP

The replacement of an impeller on an Evinrude 25 HP outboard engine may be completed in approximately an hour or two. The Evinrude impeller is housed within the water pump housing, which is located at the very top of the gear case. It is possible to gain access to the part by removing the gear case from the engine case. If you use your outboard engine on a regular basis, you should replace the impeller roughly every two years, or more frequently if necessary.

Items you will need

Using a socket wrench, remove the nuts from below the top lip of the Evinrude 25 HP gear box and set them aside. Slide the gear case apart from the motor housing by squeezing it together. Using a socket wrench, loosen the bolts holding the water pump housing to the top of the gear case, then raise the pump housing away from the motor shaft to remove it.

Step 2

Dismantle the water pump housing by turning it upside down and removing the impeller from the interior of the housing. Using a clean cloth, wipe away any dirt or residue from the interior of the pump housing.

Step 3

Apply a thin layer of marine grease to the inner edge of the pump housing and along the length of the motor shaft to keep the pump running smoothly. Place the replacement impeller into the water pump housing upside down and reposition the pump housing over the motor shaft to complete the installation.

Step 4

Slide the pump housing and new impeller down the motor shaft, then fasten it to the top of the gear case with the bolts that were previously installed. Remove and replace the gear case on the motor housing, and then tighten it down to the Evinrude 25 HP housing using the nut(s). About the AuthorCarl Pruit has been working as a freelance writer since 2005, with a focus on service journalism and travel.

His art has appeared on a number of different websites. California native Pruit attended Contra Costa Community College in San Pablo, California, where he got an associate degree in administration of justice. Pruit was born and reared in California.

Amazon.com: BDFHYK Water Pump Impeller Repair Kit with Housing for Johnson Evinrude 2-Stroke 20 25 30 35 Hp Outboard Engines Replace 393630, 393509, 391636, 0393630,Sierra 18-3382 : Automotive

3.0 stars out of 5 for this product The o-ring on the shifter rod is really tiny. On April 2, 2021, a review will be conducted in the United States. Everything functioned except for the o-ring, which was so little that it had no chance of working. I re-used my previous one, but I’m not sure what I would have done if I hadn’t had it because they are little o-rings that are the size of a really big doughnut. They are not available for purchase elsewhere. I’m hoping that one of the packers made a mistake and grabbed the wrong one.

I wouldn’t be upset if they delivered me a replacement o-ring in the correct size.

Reviews with images

On April 2, 2021, a review was published in the United States of America. Everything functioned except for the o-ring, which was so little that it had no chance of working. I re-used my previous one, but I’m not sure what I would have done if I hadn’t had it because they are little o-rings that are the size of a really big doughnut. They are not available for purchase elsewhere. I’m hoping that one of the packers made a mistake and grabbed the wrong one. After all, we’re back on the pumping machine.

1. 3.0 stars out of 5 for this product The o-ring on the shifter rod is really tiny.
2. Everything functioned except for the o-ring, which was so little that it had no chance of working.
3. They are not available for purchase elsewhere.
4. After all, we’re back on the pumping machine.
5. The photographs in this review On July 29, 2021, a review will be conducted in the United States.
6. Pumps up a storm!
7. Purchase that has been verified On July 7, 2021, a review will be conducted in the United States.
8. I would have given it 5 stars if it had included a rod keeper gasket, which I would have expected to be included because it has to be updated in addition to the rod keeper gasket.
9. On August 9, 2021, a review will be conducted in the United States.
10. On May 5, 2021, a review will be conducted in the United States.
11. I’m looking for one for a 1970.

Purchase that has been verified We were pleased with this product; it performed admirably and resolved our issue, allowing us to get back on the water. On July 3, 2021, the United States will conduct a review. Purchase that has been verified

How do you change the impeller on a 25 hp Evinrude?

1. Using a socket wrench, remove the nuts from below the top lip of the Evinrude 25 HPgear box. Inverting the water pump housing allows you to remove the impeller from the inside of the pump housing. A thin coating of marine grease should be applied to the inner edge of the pump housing as well as the length of the motor shaft.

Remove the old water pump from the area.

1. Remove the bottom unit of the Johnson engine from the boat. Remove the water pump’s mounting nuts and set them aside. Remove the O-ring from the drive shaft and set it aside. Remove the water pump casing from the vehicle. Ensure that the power head does not have any sand, dirt, or debris in it and that it is properly flushed
2. Remove the impeller by prying it out with a screwdriver.

Second, what is the best way to diagnose an outboard motor? Troubleshooting an Outboard with a Rough Running Motor

1. Fuel Connector
2. Fuel Filter/Water Separator
3. Check/Replace Secondary Fuel Filters
4. Tank Vent and Hoses
5. Check/Replace Secondary Fuel Filters Check and/or replace the air filter. Check and clean the spark plugs and ignition
6. Check and clean the carburetor.

Just to clarify, where is the impeller on the outboard? Pumps for outboard water are of a straightforward design. They’re conveniently located on top of the lower gearcase assembly, making them simple to reach and maintain. The pump is comprised of a rubber impeller that is keyed to the engine’s driveshaft for operation. Flow of water into the lower gearcase is accomplished by inlets located on the sidewalls of the gearcase, directly above the region of the propeller shaft. What year does my Johnson outboard motor belong to?

The model number of your Johnson outboard motor can generally be found on the nameplate that is attached to the motor or the mounting bracket.

The model number will indicate the year, as well as certain specifics, about that particular motor.

Evinrude Johnson outboard water pump kit

GLM Marine aftermarket lower unit water pump sets with housings for 2, 3, 4, and V6 cylinder motors are also available.

• Impeller, housing, wear plate, gaskets and seals are all included in every pump set. Compatibility with Johnson/Evinrude outboard motor models GLM Marine manufactures the product and provides a complete 2-year guarantee. Outboard engines with a V4 cross flow engine and a loopcharger, as well as their OEM part numbers

Click below for exploded viewJohnson outboard water pump kits	Price(USD)	Price(Canadian)
12108 Johnson/Evinrude impeller repair kit	P/N 12108Johnson Evinrude outboard 2 stroke impeller set with wear plate.3, 4 and 5 hp. 1952 – 19784 hp. 1960 – 19835 hp. 1965 – 19685.5 and 6 hp. 1954 – 19797.5 hp. 1954 – 19588 hp. 1984 – 1996	$18.99	$23.99
12065	P/N 12065OEM 396644 Johnson/Evinrude two stroke models 4 hp. Deluxe 1985-1988 4.5 hp years 1980-1984 5 hp years 1986-1990 5 and 6 hp. 4 stroke 1998 6 hp years 1984-1996 7.5 hp years 1980-1983 8 hp years 1984-1996	$52.99	$67.99
12050Water Pump Kit	P/N 120509.9 and 15 hp Johnson outboard modelsWater pump kit replaces 394711, Sierra 18-3327, Mallory 9-482014 stroke 8 hp. 1995 9.9-15 hp. 1995-present2 stroke 9.9-15 hp. 1974-1996	$38.95	$50.95
89770	P/N 89770Johnson and Evinrude outboard impeller replacement ForP/N 120504 stroke 8 hp. 1995 9.9-15 hp. 1995-presenttwo stroke 9.9-15 hp. 1974-1996	$15.95	$19.95
12255Evinrude/Johnson kit	P/N 12255Evinrude/Johnson 2 stroke outboard motor set without pump housing. $29.95 4 hp. Deluxe 1985 to 1988 4.5 hp. 1980 to 1984 5 hp. 1986 – 1990 5 and 6 hp. 4 stroke 1998 6 hp. 1984 to 1996 7.5 hp. 1980 – 1983 8 hp. 1984 – 1996Included in set P/N 22322 Stainless steel bolt / 324430 P/N 89594 stainless steel pin / 300611P/N 86492 grommet / 302497P/N 12818 cup / 324641P/N 89500 impeller / 389576P/N 82030 o ring / 305242 P/N 36810 gasket / 325040P/N 12555 wear plate / 326640	$30.99	$38.95
18-3383Evinrude/Johnson repair kit with housing	P/N 18-3383Replaces GLM 12060, OEM 3952702 Johnson/Evinrude outboard 2 Cylinder cross flow engines with thru-cavitation plate exhaust and 2 piece gear-case18 hp. 1997-199825 hp. 1979-200528 hp. 1986-1998	$51.95	$63.95
12060 Evinrude-Johnson water pump complete	P/N 12060OEM 3952702 Water pump repair kit forcross flow engines with thru-cavitation plate exhaust and 2 piece gear-case

• 1997-1998, 18 horsepower From 1979 to 2005, the engine was 25 horsepower
• From 1986 to 1998, the engine was 28 horsepower.

$35.99	$46.99
12070Johnson / Evinrude outboard kit	P/N 12070Johnson Evinrude outboard OEM part number 393630 2 cylinder models with through prop exhaust and one piece gear cases.

• 20 horsepower from 1985 to 1998
• 25 hp from 1985 to 2005
• 35 hp from 1980 to 1996

$42.95	$56.95
12247 Johnson/Evinrude kit	P/N 12247Johnson/Evinrude outboard with 2 cylinder cross-flow engine. OEM part number 391741$62.9540 hp. Small housing 1974 to 1976 40 hp. Commercial outboards years 1981 to 1987Included in set: 86180 seal 321466 89595 Impeller key 30892886180 oil seal 321466 86483 Grommet 304028 12474 Pump housing 390613 12816 cup 325397 89990 impeller 390286 36860 gasket 325229 12564 wear plate 325398 36850 gasket 325399	$72.99	$94.99
12235Water pump kit	P/N 12235Johnson/Evinrude 2 cylinder loopcharged outboard engines with large gear-case with the six vane impeller. $68.9540 hp. Large housing 1995 – 2005 45 hp. Commercial large housing for years 1995 to 2005 55 hp. Large housing 1995 – 2005Included: P/N 22351 bolt / 328725 P/N 22352 Screw / 337574P/N 86497 Grommet / 333758P/N 12482 pump housing / 438545P/N 12815 cup / 340619P/N 81140 o ring / 326649 P/N 89710 pump 396725P/N 89591 impeller / 331901 P/N 89592 impeller key black / 334897 P/N 86570 seal 324981 P/N 12551 wear plate / 341038 P/N 33150 gasket / 336530P/N 11053 Yellow spring / 343977P/N 13240 Thermostat cover / 343141P/N 35440 Gasket / 329830P/N 86491 Grommet / 341732	$79.99	$103.99
	P/N 12552Johnson/Evinrude 2 cylinder loopcharged outboard engines with large gear-case with the six vane water pump impeller with out housing.$54.9540 hp. Large housing 1995 – 2005 45 hp. Commercial largehousing for years 1995 to 2005 55 hp. Large housing 1995 – 2005Included P/N 86490 Grommet / 333758 P/N 12815 cup / 340619 P/N 12550 Wear plate / 319275P/N 81140 o ring / 326649 P/N 89710 pump 396725P/N 89591 impeller / 331901 P/N 89592 Impeller key black / 334897 P/N 86570 seal / 324981P/N 12550 wear plate / 341038 P/N 33150 gasket / 336530 P/N 34330 gasket /319586 P/N 86491 Grommet / 341732 P/N 12950 guide / 319276 P/N 22320 Screw / 908158	$54.95	$71.95
89750Evinrude-Johnson impeller with key	P/N 89750Johnson and Evinrude outboard impeller for kit

$17.95	$21.95 Cdn
12101	P/N 12101V4-V6 water pump kitReplaces 395073, Sierra 18-3393, Mallory 9-9-48208V4/V6 outboard lower units with mechanical-hydraulic shift. Uses a half moon key20″ transom 85, 115 hp. 1977 85, 115, 150 and 235 hp. 1978 100 hp. 1979-1980 140, 175 hp. 1977-1978 200 hp. 1976-197825″ transom 85, 115 hp. 1977	$63.95	$82.95
12102	P/N12102 for V4 – V6 – V8 water pump kitReplaces 5001594, Sierra 18-3392, Mallory 9-48203Johnson/Evinrude V4/V6/V8 with 20″ transom with plastic wedge key.85 hp. 1979-1980 90 hp. 1981-1994 90 hp. 1995-2003 100 hp. 1984-1997 100 hp. 1998-2005 115 hp. 1979-1994 115 hp. 1995-2006 120 hp. 1985-1994 130 hp. 1995-1998 135 hp. 2000-2006 140 hp. 1979-1984 140 hp. 1985-1994 150 hp. 1979-1992 150 hp. 1993-2006 175 hp. 1979-1992 175 hp. 1993-2006 185 hp. 1984-1992 185 hp. 1993-1994 200 hp. 1979-1992 200 hp. 1993-2006 225 hp. 1986-1992 225 hp. 1993-2006 235 hp. 1979-1985 250 hp. 2006 250 hp. 1991-1992 250 hp. 1993-1998 275 hp. 1985-1988 300 hp. 1985-1992 300 hp. 1993-1995	$63.99	$82.99
12000	P/N 12000Water pump for V4, V6 and V8 lower units *Note – correct impeller is shown below P/N 89570 which is included in this kit Replaces OEM part number 5001595, Sierra 18-3315, Mallory 9-48200Evinrude/Johnson outboard motor V4/V6/V8 models with 25″ transoms with plastic wedge type keys. 90 hp. 1995-2003 100 hp. 1998-2005 105 hp. 1998-2001 115 hp. 1995-2006 120 hp. 1985-1994 130 hp. 1995-1998 135 hp. 2000-2006 140 hp. 1985-1994 150 hp. 1993-2006 175 hp. 1993-2006 185 hp. 1993-199425 and 30″ transoms 200 hp. 1993-2006 225 hp. 1993-2006 250 hp. 2006 250 hp. 1993-1998 300 hp. 1993-1995	$65.99	$85.99
89570impeller V4-V6-V8 models 90 to 300 hp	P/N 89570For P/N 12000 V4/V6/V8 models with 25″ transoms with plastic wedge type keys.90 hp. 1995-2003 100 hp. 1998-2005 105 hp. 1998-2001 115 hp. 1995-2006 120 hp. 1985-1994 130 hp. 1995-1998 135 hp. 2000-2006 140 hp. 1985-1994 150 hp. 1993-2006 175 hp. 1993-2006 185 hp. 1993-199425 and 30″ transoms 200 hp. 1993-2006 225 hp. 1993-2006 250 hp. 2006 250 hp. 1993-1998 300 hp. 1993-1995	$19.95	$24.95
12210 Small gearcase 2-3 cylinder loopcharged 439077	P/N 12210OEM 439077 Johnson and Evinrude outboard 2 and 3 cylinder loopcharged with small lower unit gearcase40 hp. Small pump housing 1984-1988 48 hp. Small housing 1987-1988 50 hp. Small pump housing 1986-1988Commercial 40 hp. small housing 1993-1994 45 hp. Small pump housing 1986-1994 50 hp. 55 hp. small housing 1986-1994	$80.99	$104.99
12104 OMC Johnson/Evinrude without housing	V4/V6/V8 with20″ transom with plastic wedge key. 85 hp. 1979-1980 90 hp. 1981-1994 90 hp. 1995-2003 100 hp. 1984-1997 100 hp. 1998-2005 115 hp. 1979-1994 115 hp. 1995-2006 120 hp. 1985-1994 130 hp. 1995-1998 135 hp. 2000-2006 140 hp. 1979-1984 140 hp. 1985-1994 150 hp. 1979-1992 150 hp. 1993-2006 175 hp. 1979-1992 175 hp. 1993-2006 185 hp. 1984-1992 185 hp. 1993-1994 200 hp. 1979-1992 200 hp. 1993-2006 225 hp. 1986-1992 225 hp. 1993-2006 235 hp. 1979-1985 250 hp. 2006 250 hp. 1991-1992 250 hp. 1993-1998 275 hp. 1985-1988 300 hp. 1985-1992 300 hp. 1993-1995	$52.95	$69.95
12232 water pump	P/N 12232OEM 389133 2 or 3 Cylinder loopcharged small gearcase with half moon key 50 hp. 1971-1978	$88.99	$113.99
89660 impeller	P/N 89660For P/N 12232	$23.95	$29.95
12240	P/N 12240OEM 438602 2 Cylinder loopcharged large gear case use with plastic wedge key60 hp. 1979-20053 Cylinder loopcharged 60 hp. 1989-2001 65 hp. 1979-2001 70 hp. 1979-1994 75 hp. 1979-1988	$71.95	$94.95
12244 Johnson outboard 3 cylinder kit	P/N 1224470-75 hp water pump impeller kit with housingReplaces OEM 438579, Sierra 18-3389, Mallory 9-48203

• Lower unit with three cylinders and loopcharged
• Large gearcase Key for a half moon impeller for engines with 70 and 75 horsepower in the years 1974-1978.

$67.99	$88.99
12245	P/N 12245OEM 438592 2 Cylinder 40 to 50 hp loopcharged engine Small gearcase large water pump with the 3 vane impeller40, 48 and 50 hp. 1989-1998	$60.99	$79.99
12246water pump kit	P/N 12246OEM 432955Johnson and Evinrude outboard 3 cylinder loopcharged engines with the large lower unit gearcase with half-moon key 2 stroke60 hp. 1989-2001 65 hp. 1979-2001 70 hp. 1979-1994 75 hp. 1979-19884 stroke 6070 hp. 1998up	$55.95	$63.95
water pump kit	P/N 12233Johnson outboard water pump kit 25-30-35 hp 3 cylinder	$53.99	$69.99
12108 Johnson/Evinrude outboard 2 stroke impeller kit	P/N 12108Johnson/Evinrude outboard two stroke impeller kit $19.953,4 and 5 hp. 1952 – 19784 hp. 1960 – 19835 hp. 1965 – 19685.5 and 6 hp. 1954 – 19797.5 hp. 1954 – 19588 hp. 1984 – 1996

Brian at the order desk can assist you if you still need assistance with your water pump repair kit or bulk purchase criteria for free delivery.

25 hp water pump replacement

The bottom unit of a 1988 25 HP Merc has been 2 inches down, but I have been unable to remove it from the vehicle. The motor is in neutral, but there is something preventing it from being brought all the way down.?

Re: 25 hp water pump replacement

It is possible that the shift shaft is still attached. When removing a lower unit, it’s common practice to unplug the power supply first. In contrast to Mercedes, many of the smaller versions from back then were actually manufactured by Yamaha and had a splined shift shaft that easily slips off on its own when engaged. Don’t try to push it. Consider looking at the shift shaft to see if it goes up and down to shift gears, or if it rotates to rotate the transmission. If it rotates, it is a splined object.

Some of the older Mercedes-Benzes feature a lower section that is slung back more than is customary at the bottom.

While it would not necessarily drop straight down, it would be pulled somewhat to the rear as you lower it, resulting in the appearance of it hanging or binding on the rear stud as you lower it.

Re: 25 hp water pump replacement

Thanks! When shifting, I believe it does go up and down in the middle.

However, I tried everything you suggested and the phone is still ringing. The shift shaft, on the other hand, is not completely jammed up, and I’m not certain it is. Is it possible that anything else is holding it together after it has dropped around 2 inches?

Re: 25 hp water pump replacement

The shift shaft disconnect is located under the engine and must be undone in order for it to be removed; it is held in place by a screw and a plastic sleeve, and the rod that connects it to the shift lever is visible.

Re: 25 hp water pump replacement

I might be completely incorrect, but I’ll just throw it out there. The shift shaft may have a brass coller at the top of the drive shaft that supports a rubber seal or spacer if you are certain the shift shaft is detached on that particular model. It may become stuck, and you will need to give it the appropriate amount of wiggle as you pull it out. I’ve had something similar happen to me previously, and it was extremely puzzling, but I don’t remember which model it was.

Re: 25 hp water pump replacement

I had to replace the water pump on my 20hp this year, but it was no big deal.