Fuel Pump Diaphragm Kit 21-857005A1
- Guaranteed fitment for 432 different models
- This is an OEM part manufactured by Mercury Marine
- Flat rate shipping starting at $4.95
- 30 day return policy
Product Description
43 Product Questions
c merriman
Answer:
Yes, that will work.
Doug
Answer:
Yes, it will.
Bob S
Answer:
Yes, it will.
Marion Judy McKenzie
Answer:
Yes, this will work with your motor.
Travis Mitchell
Answer:
Yes, this will work with your application.
Rob
Answer:
Yes, this kit will have everything you need to rebuild your fuel pump.
Rober
Answer:
Yes, this part will work with your motor.
Jim
Answer:
Yes, this kit will work with your motor. It is the correct one needed.
Scott Newling
Answer:
Yes, this kit will work with your motor.
Chris
Answer:
Yes, this part will fit your motor.
ANTHONY
Answer:
Yes, part number 857005A1 https://www.crowleymarine.com/parts/276.cfm will fit your provided engine model.
Daryl
Answer:
Yes, this will be the correct kit for your motor.
Jim
Answer:
Yes, this kit will fit your outboard.
Nathan
Answer:
Yes, this fuel pump kit will fit your engine.
Howard
Answer:
Yes, this fuel pump kit will fit your engine.
BRIAN WEBB
Answer:
Yes, this part will fit your 0G925524
Ed
Answer:
Yes, this part will fit your engine.
Mark Shaw
Answer:
Hello, Mark. I am not showing your serial number at our system. Do you have the model number on hand? Let us know, please. Thank you
Phil
Answer:
Yes, this kit will fit your engine.
homer
Answer:
Yes, this kit will fit your engine.
Roberto
Answer:
Yes, this part will fit your engine.
Evan
Answer:
Hello, Yes, this will be the correct diaphragm kit for your engine. Thank you
Glen Rasmussen
Answer:
Hello Glen, With the serial number, I pulled up the following diagrams FUEL PUMP(SERIAL NUMBER 0T408999 & BELOW) https://www.crowleymarine.com/mercury-outboard/parts/4858_100.cfm?mdl=TXIOCO Am not pulling up a rebuild kit for the fuel pump. Maybe you can buy each piece separately, to rebuild the pump. Thank you.
Jessie
Answer:
Hello, Yes, this part will fit your engine. Thank you
Thomas Rhodes
Answer:
Greetings, This rebuild kit will not fit your model. Unfortunately your specific model doesn't come with a fuel pump diaphragm kit and you would have to look on the fuel pump section of your model's diagrams and piece out everything you need from the kit individually. The link to that section is listed below. Thank you https://www.crowleymarine.com/mercury-outboard/parts/2950_90.cfm?mdl=EOSQKI --
Tracy
Answer:
Hello, Yes, this fuel pump kit will fit your engine. Thank you -- Andrés Nasser Crowley Marine 1-800-580-0720
corey
Answer:
Hello, yes, this part will fit your engine. Thank you -- Andrés Nasser Crowley Marine 1-800-580-0720
Steve
Answer:
Hello, yes, this part will fit your engine.
JIM MCWILLIAMS
Answer:
Hello, Jim. Yes, this part will fit your engine.
Harald Debor
Answer:
Hello, yes, this fuel pump Diaphragm Kit will fit your engine.
Mark D McCabe
Answer:
Hello, Mark. Yes, this part will fit your engine.
Steve
Answer:
Hello, Steve. Yes, this part will fit your engine and it shows you will need two of them.
Ron Wilcox
Answer:
Hello, yes, this diaphragm kit will work with your engine.
Wayne Searcy
Answer:
Good morning,
Jeremy Arnold
Answer:
Yes, that will be the correct kit needed for your application.
Edgar Lopez
Answer:
Yes that will work for your application.
Jesse Meyer
Answer:
Hello, That should be the correct one, but are you able to supply your serial number. We would need that to determine. Thank you
Erick
Answer:
Yes, that would be the correct repair kit for your fuel pump.
Andy Hinton
Answer:
Unfortunately this kit would not work for your application. The diagram kit they were offering has been discontinued and they are saying to order the complete fuel pump for that now.
matt
Answer:
Yes, that would be the correct fuel pump kit for your application.
Patrick
Answer:
Yes, I am showing that part number 857005A1 would be the correct one for your application.
Antonio Altamirano
Answer:
I am not showing that to fit the 25hp models. If you are able to supply your serial number we can look further into this for you.
Johnson
Answer:
This is a Mercury part. If you have a Yamaha VMAX, you will want to look up your parts using the Yamaha parts catalog.
97 Product Reviews
Various makes and models
- Repair Difficulty
- lProfessional
- Repair Time
- Less than 30 mins
Problem fixed: multiple problems with multiple engines
Good information on the site, clear schematics
Mercury 50hp
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Problem fixed: Poor Idle speed
Take notice of the internals in the fuel pump so as to replace all parts. You may have to drill out the plastic discs at to insert the rods. Take care not to lose the small parts.
Mercury 40
Mercury
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Problem fixed: Engine bogging down and primer pump not getting hard (easy….😳)
After several trips and many long starts of countless pulls of the rope on my 40HP Mercury Tiller steer 2 stroke , it would take forever to crank my outboard as it I was flooding it. So naturally I would try to start with throttle wide open. As this gradually worsened, I decided that I needed to get to the bottom of the issue. After combing through many YouTube videos and online forums, I kept circling back to the primer bulb would not stay pressured up and the engine would be flooded. I finally bit the bullet and ordered the fuel pump diaphragm kit. (QUICKSILVER MARINE PARTS & ACCESSORIES 21-857005A 1 DIAPHRAGM KIT) I found an obvious issue once I pulled my pump apart. This kit was exactly was I had been needing for a long time. I’ll probably changes this kit preventatively on a 5 year schedule now.
1999 Mercury Bluewater 150XL
- Repair Difficulty
- Medium
- Repair Time
- 1 to 2 hours
Problem fixed: Carburetor Rebuild - Fuel pump rebuild
Boat was in storage for 15+ years and had the OEM gaskets, float, needles, etc. We ordered three rebuild kits for after cleaning to bring them back to health. Irony is when we checked the idle/mixture screw positions. they were all really off from Mercury specs which explained some of the rough idle, bogging, etc when we first tried to start and run it. The carburetors were actually pretty clean when we tore them down. Fuel pump was the same but the diaphram and components were pretty worn and definitely needed help. Again, this is not a terrible hard project but everything came with diagrams and instructions to ensure they went back together as intended.
Mercury 90HP 2 Stroke
200 Mercury XR6
- Repair Difficulty
- Medium
- Repair Time
- 1 to 2 hours
Problem fixed: poor water flow thru discharge port, (pee hole)
dropping the lower unit is fairly easy, 6 bolts/nuts. Note; two forward nuts cannot be removed completly until separation of about 3/8" . Installing new water water pump kit was fairly easy, taking care to use only the gaskets that are the same as those you remove. I used patroleum jelly to lube the shaft seal and pump impeller. Take care to twist the impeller into metal housing same rotation as that of the motor, mine is clockwise looking down. When reassembling lower unit go slow until shifter and water tube are aligned. This was a challenge for me, had to have help holding while aligning and engaging slowly. I now have good water flow.
Mercury 75ELPTO
Mercury 150
- Repair Difficulty
- Medium
- Repair Time
- Less than 30 mins
Problem fixed: Full service tune-up (used boat)
I checked all the boxes on this used boat with unknown service history. I replaced everything from spark plugs, thermostats, fuel pump, both fuel filters, fuel line, and some miscellaneous missing/broken items from the cowling. Crowley had it all!
Mercury 100
mercury 6ohp
- Repair Difficulty
- Easy
- Repair Time
- 30 to 60 mins
Mariner 115
- Repair Difficulty
- Medium
- Repair Time
- 1 to 2 hours
Problem fixed: Rough idle.
Cleaned carbs and fuel pump. All is good now
2003 Mercury 150
- Repair Difficulty
- Medium
- Repair Time
- 1 to 2 hours
Problem fixed: Engine overheat at high rpms
Motor was overheating. Installed new poppet and thermostats. Poppet was a little difficult but taking my time was able to get it done in about half an hour . all good now!
force 75 hp
Mercury 175
2000 Mercury 225 EFI
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Problem fixed: Running rich, smells like gas badly
My engine smell liked gas terribly and was running rough, sometimes even had low poor. Found vacuum fuel pump to be leaking and letting fuel run down the line out of engine compartment. I beleive this to have also caused a vacuum leak, which induced a rich running condition at idle. The pump was rebuilt this winter with an aftermarket kit, so I rebulit it again with an OEM kit from Crowley. Same price! Engine is back to running excellent!
1984 Mercury 70 hp 3 cyl
- Repair Difficulty
- Medium
- Repair Time
- 2 to 4 hours
Problem fixed: 3 carb cleaning, gaskets, water pump
Haven't finished. But close!
1998 90 hp Outboard Moror
- Repair Difficulty
- Medium
- Repair Time
- 30 to 60 mins
Problem fixed: Low Water Pressure
I rebuilt my water pump with parts purchased from Crowley Marine. It was fairly easy, with help from YouTube.
Mercury 250
MERCURY 200 EFI
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Problem fixed: FUEL PUMP
REPLACED GASKETS
150 hp
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Mercury 40hp
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Force 40hp
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
135 Mariner
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Problem fixed: Fuel pump
Removed fuel pump and followed directions was quick and easy to repair and back on the water in no time.
Mercury tracker force
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Problem fixed: lost prime even at low throttle
rebuilt fuel pump. Gasket material broken and stuck in the diaphragm.
Mercury 50hp
- Repair Difficulty
- Medium
- Repair Time
- 30 to 60 mins
Problem fixed: Not enough fuel
Disassemble. Clean parts well. Reassemble according to the service manual procedures
mercury 90 hp
- Repair Difficulty
- Easy
- Repair Time
- 1 to 2 hours
Problem fixed: rebuilt fuel pump
had a problem with smoking a lot at idle. Rebuilt carbs 1st, Tried to google ? Could fuel pump leak internal, Could not seem to get an answer!!! Decided to unbolt fuel pump from block & squeez bulb. Yes, fuel came out of hole going to block. Pulled fuel pump apart & Yes, The Diaphrams were cracked!! ORdered & installed fuel pump kit. Now I can do a better adjustment on carbs * motor dosen;t smoke like it was. Thank you , Hoyet
1994 60 hp. Mercury engine
- Repair Difficulty
- Medium
- Repair Time
- 30 to 60 mins
Problem fixed: intermittent fuel supplied to engine
rebuilt the fuel pump. watched a you tube video and did the repair. Kind of easy that way.
Mercury 90hp
- Repair Difficulty
- Easy
- Repair Time
- 30 to 60 mins
Problem fixed: Bogging
Rebuilt fuel pump and replaced throttle rod keepers
'87 115 inline 6 mercury
- Repair Difficulty
- Medium
- Repair Time
- 1 to 2 hours
Problem fixed: just old, like me. waterpump impellors deteriorate as do I.
Straight forward, using a repair manual.
1988 Mercury 115 (2 stroke)
- Repair Difficulty
- Medium
- Repair Time
- 2 to 4 hours
Problem fixed: loss of power, difficult to start, poor idle
Serviced the 3 carbs and fuel pump. Replaced all fuel hoses Drained stale fuel. Replaced fuel filters.
1998 75 FORCE
- Repair Difficulty
- Hard
- Repair Time
- More than 4 hours
Problem fixed: POWRER HEAD EXAHSAT LEAK AND COULD SEE WATER LEAKING FROM MAIFOLD.
DROPPED LOWER UNIT. PULLED POWER HEAD AND EXHAUST TUBE OUT. IT IS A BIG JOB, NOT FOR NONE MECHANICAL PEOPLE. HAVE NOT GOT IT ALL BACK TOGETHER YET. WAITING FOR A PART I BROKE TO GET FIXED, NOT MADE ANY MORE. GOT PICTURES IF ANY BODY INTERESTED?
40 hp
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Problem fixed: Leakey fuel pump
Remove rebuild replace
Mercury Classic 50 45 hp
- Repair Difficulty
- Medium
- Repair Time
- More than 4 hours
Problem fixed: Leaky lower unit
Went to pull lower unit and found that the drive shaft was stuck in the fly wheel. Had to remove OB from the boat and turn it upside down, suspending it from the lower unit. Using a grease dissolver and some wooden wedges I was able break the drive shaft loose. After that it was just putting everything back together. Just a side note, I never have worked on an OB before, but I sure learned from the experience.
Mercury 35 hp
- Repair Difficulty
- Easy
- Repair Time
- 2 to 4 hours
Problem fixed: Water leaking at upper spark plug. Engine floods with fuel and wont run.
Replaced gasket on cylinder water jacket. Replaced diaphragms and gaskets in fuel pump. Disassembled, cleaned, and replaced gaskets in carburetor and new crush washer under fuel inlet needle. Runs nicely and idles perfectly now with no water shooting out around the spark plug haha.
1998 mercury tracker
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Problem fixed: fuel pump seal leaking
rebuilt fuel leaking fuel pump. replaced internal parts and seal
Mercury 40
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Problem fixed: Speed going up and down
Rebuilt fuel pump
mercury 50 hp
- Repair Difficulty
- Medium
- Repair Time
- Less than 30 mins
Problem fixed: fuel pump was kind of failing
i just put all the new fuel pump diaphram gaskets back where the old ones were and the fuel is working perfect.
Mariner 30hp
- Repair Difficulty
- Medium
- Repair Time
- 2 to 4 hours
Problem fixed: Water pump
Broke the shift linkage taking the lower unit off I thought I had it but apparently I didn’t. And broke the linkage under the power head. But it’s fixed now
1997 Mercy Elpto 115
- Repair Difficulty
- Easy
- Repair Time
- 30 to 60 mins
90 HP mariner 1990
- Repair Difficulty
- Medium
- Repair Time
- 1 to 2 hours
Problem fixed: ball wont pump up gas running from carbs
float for carb had hole in it was a week till fishing tournament looked all over no one had it in stock then found Crowley shipped quick got me back in water try these people first i originally ordered from ebay just to get email a week later saying parts were out of stock ball wouldnt pump up gas running from carbs bad float and pump a little hard to carbs off but after leaving bottom mounting bolts through carbs come right off nit that bad no special tools needed
Mercury
- Repair Difficulty
- Hard
- Repair Time
- 2 to 4 hours
Problem fixed: No fuel
Rebuilt fuel pump and carburetor
Mercury 90hp
- Repair Difficulty
- Easy
- Repair Time
- 2 to 4 hours
Problem fixed: Engine sat up for 10+ years
Rebuilt carburetors and fuel pump, changed water pump and fuel filter, cleaned out fuel tank and changed the 2-cycle oil.
Mercury 200hp efi
- Repair Difficulty
- Easy
- Repair Time
- 30 to 60 mins
Problem fixed: Hard to crank after running and then sitting for at least 15 minutes.
Repair did not fix my problem.
50 hp mercury
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Problem fixed: its a mercury been setting up for a long time
not done yet
Mercury 150
- Repair Difficulty
- Easy
- Repair Time
- 1 to 2 hours
Problem fixed: maintenance
rebuilt the fuel pump. exchanged the fuel filter and replaced the impeller.
2000 Mercury 225 PROMAX
- Repair Difficulty
- Medium
- Repair Time
- 1 to 2 hours
Problem fixed: Water pressure issues
Switched adapter plates, had different water path, plus has a sport master lower which added to problem.
Force 120
- Repair Difficulty
- Medium
- Repair Time
- 2 to 4 hours
225 Optimax
- Repair Difficulty
- Medium
- Repair Time
- 1 to 2 hours
Mariner 150 dfi
- Repair Difficulty
- Medium
- Repair Time
- 1 to 2 hours
1995 Merc 90HP 2 - Stroke
- Repair Difficulty
- Medium
- Repair Time
- More than 4 hours
Problem fixed: Low compression number 1 cylinder
I had low compression in the number one cylinder of my 1995 Merc 90hp two stroke outboard. After being on the fence on how to repair or replace it I decided on buying a long block for it. After a month or so of searching prices ,costs and so on I settled on buying one from Crowley Marine. The reason is simple, bottom line was customer service and satisfaction from their customers. I could have bought cheaper including install but decided it against it for that reason also. Believe me I researched the heck out of Crowley through the internet before I made my choice. I did the complete power head change out in about 10 hours or so. Take pictures as you go so you know how to put everything back together too. Also buy a OEM repair manual and nothing else !! Believe me big help! Ok got the new long block installed , lower unit back on and was all proud of myself. Set up the basic timing, this is where you NEED the OEM manual for sure. I filled the barrel full of water with the lower unit in it and was all ready to start it. The motor turned over, compression, wants too fire but wont run. Ok when this happens everybody knows that feeling. I double check fuel supply , filter, lines and so on. all is fine. Well you know what , if you read the owners manual and FOLLOW their directions on how to start your motor it just may run ! I pushed the key in to prime carbs , counted to ten while thinking in the back of my mind I messed up some where and surprise, I just tapped the key and she fired right up ! I have never had a outboard start so easily ever all the time. End of story is do your home work and buy a long block. Really not hard to do.
175 sportjet
- Repair Difficulty
- Medium
- Repair Time
- Less than 30 mins
Problem fixed: Wouldn't rev high enough to plane the boat.
Rebuilt the fuel pump.
mercury 40 hpeee
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Problem fixed: not getting fuel
cleaned and replaced diaphram
Mercury 90
- Repair Difficulty
- Medium
- Repair Time
- 2 to 4 hours
Problem fixed: Install carb kits and fuel pump kit
Remove old carburetors, Disassembled each carb ( 3 of them) Cleaned old carburetors with carb cleaner Installed carb kits and set float level Re-installed carbs Set carb/timing synchronizing Removed fuel pump Cleaned old fuel pump body Installed fuel pump kit Started engine and adjusted carb idle jets
Mercury 40hp
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Problem fixed: Bogs out on WOT
Removed fuel pump, disasimbled. Installed fuel pump rebuild kit.
99 Force 40 HP
- Repair Difficulty
- Hard
- Repair Time
- More than 4 hours
Problem fixed: Failed Cylinder Sleever - COMPLETE rebuild
After discovering a failed cylinder sleeve on my 99 Force 40HP (by Merc.), I decided to do a COMPLETE overhaul including new forged pistons, rings, all gaskets, fuel hoses, paint (cowl & leg), decals, and otherwise. Crowley has been key to sourcing specific parts that aren't readily available anymore, or finding part numbers and part specs for parts that aren't available anymore (e.g. the 2.5" partially threaded exhaust manifold bolts). At this point, I just need to reconnect the electricals and will be seeing if she fires. wish me luck!
Mercury Blaxk Max 135 V6 1986
- Repair Difficulty
- Medium
- Repair Time
- 1 to 2 hours
Problem fixed: Possible Diaphram issue.
Follow instructions that come with kit. Easy to understand once you dismantle the pump. Make sure you take photos as you take the pump apart as you need to make sure all the parts go back in the correct order.
Mercury 50 HP
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Problem fixed: bought a battery charger. Worked great!
Hooked it up as per instructions (easy) and let it work!
50 hp classic mercury
- Repair Difficulty
- Easy
- Repair Time
- Less than 30 mins
Problem fixed: fuel pump
I purchased a fuel pump kit from another supplier (ebay) and they had out of date kit without instructions. Crowleys cost was a little more, but the kit was correct and there were instructions for the repair included. I should have went with Crowley in the first place. Live and learn. Joe
Customers Also purchased
Supersession Chain
| Name | SKU | Superceding SKU |
|---|---|---|
| Fuel Pump Diaphragm Kit VIEWING THIS PRODUCT | 857005A1 | CURRENT |
| DIAPHRAGM KIT | 42990A10 | 857005A1 |
| DIAPHRAGM KIT | 42990A11 | 857005A1 |
| CHECK VALVE KIT | 42990A7 | 42990A10 |
| DIAPHRAGM KIT | 42990A9 | 42990A10 |
| DIAPHRAGM KIT | 42990A6 | 42990A9 |
| DIAPHRAGM KIT | 42990A8 | 42990A9 |
| DIAPHRAGM KIT | 42990A4 | 42990A7 |
| DIAPHRAGM KIT | 42990A5 | 42990A8 |
| DIAPHRAGM KIT | 42990A1 | 42990A4 |
| DIAPHRAGM KIT | 42990A3 | 42990A6 |
| DIAPHRAGM KIT | 42990A2 | 42990A5 |
Aftermarket Product Interchange
| Name | SKU | Price | Brand |
|---|---|---|---|
| Fuel Pump Kit | 18-7817 | - | Sierra Marine |
| Force/Mercury 3,4,6CYL Fuel Pump Kit | FM-803 | - | Red Rhino |