Mercury or Mariner fuel pump rebuild

[@Ocalaman]

This is a very clear video that shows just how to remove, disassemble and reassemble the fuel pump. Thanks for making this video.

[@HRIservicesllcSturgeonBay]

Your welcome glad you enjoyed it.

[@MRBRAINCANDYMUSIC]

Thank you much for this video. Followed it step by step to rebuild the pump on my 1994 Mercury XR6 150. Fired up on first crank and idled great on the hose. Hoping it solved my idle issues and lack of power at full throttle. Final test at the lake this weekend. Thank you much.

[@HRIservicesllcSturgeonBay]

Glad to be of assistance, thanks for watching!

[@yerfdog79]

Thanks for the video. I'm goin to give the rebuild a shot. I have a 90 Merc, early 90's that'll run perfect in the driveway, and perfectly on the water, under load, for like 30 seconds. New tanks, bulbs, hoses, carbs cleaned.... assuming fuel pump.

[@HRIservicesllcSturgeonBay]

Good luck Jeff, I also have a video on rebuilding/cleaning those carbs. Let me know if you run into any snags.

[@yerfdog79]

@@HRIservicesllcSturgeonBay appreciate it.

[@davidn1945]

This is the only video that shows how to press the pins in on the round valves

[@HRIservicesllcSturgeonBay]

Thanks David, glad it all worked well, thanks for watching. I try to add all the details.

[@captlarry-3525]

perfectly clear and straightforward.. good to know about the plastic jam pin

[@HRIservicesllcSturgeonBay]

Glad my video was of assistance to you, glad to help. Thanks for watching.

[@jameshernandez4338]

Pressing the pin was the best part thank you from the bottom of my heart now I can go to the lake👍

[@mkruse1058]

Simple but very informative. Thank you so much for sharing your expertise. It motivates me in repairing my 1997 Mercury 125 HP. Great job sir!

[@joeloaks]

Amazing attention to detail in this video. You are truly a professional, not only at the assembly level but at the editing and filming level as well. I am about to start this project and feel very confident of getting it done properly with none of the unknown. Thank You!

[@CeRiJL]

Hi, congratulations for your videos, it helped me with the fuel pump, but the problems are still there, now it starts better in engine hot but in engine cold it doesnt suck well, only when I'm accelerating a lot. Even worse than before. I changed the fuel tank, the fuel line, hand pump and rebuilt the fuel pump with a new gasket, membranes ... everything. my engine works perfect for everything else .... thanks

[@HRIservicesllcSturgeonBay]

Glad the video was helpful. If you are still having issues, verify your vacuum line from the base of the engine is in good condition.

[@CeRiJL]

@@HRIservicesllcSturgeonBay ok I check it early, I thought about it before but I didnt check it, of course! is the last thing you think may fail .... ops! thanks, lets see...

[@ronaldwalker6790]

Hi Ricky, i am only diy guy but i would say the white hose is the impulse connection to drive the fuel pump,the oil mixture pump and resevoir are seperate.I have 40 hp mariner that uses same fuel pump and some owner has removed the oil mixture resevoir,so the oil mixture pump has been disabled. Great videos thanks.

[@HRIservicesllcSturgeonBay]

Thank you.

[@danmeierdiercks4452]

Hi Ricky, I am planning on rebuilding the fuel pump on my 1988 115hp power trim inline 6 two stroke engine.The serial number is OB381388. It has the square fuel pump. I was wondering which rebuild kit I would need. I am not using the auto-blend fuel/oil mixer and instead mixing it myself. Thanks for making this video. I'm sure it come in handy once I start the rebuild!

[@HRIservicesllcSturgeonBay]

Please send me an email to [e-mail] and I will send you some information I found.

[@squirrellyadventures2809]

I have a 1986 60 hp mercury outboard that bogs with acceleration under load. Won't get on plane. Idles great. Starts right up and revs up in neutral but in gear only get about 3000 rpm. Rebuilt carbs and I have a donor motor that had a thrown rod in cyl. 2 for parts. Any ideas of where to start? New fuel lines,tank and primer bulb were just installed and carbs rebuilt. Love your videos! The detail and writing on the video is very helpful especially for the hearing impaired!

[@HRIservicesllcSturgeonBay]

Kyle there are both two cylinder 60 hp, and three cylinder 60 hp engines. Assuming yours is the two cylinder, it looks like your carb is a round float bowl style carb. Send me an email and I can send you some info. [e-mail]

[@michaelbarbieri2728]

I have this exact issue with my 86 90hp. Did you get it figured out?

[@squirrellyadventures2809]

@@michaelbarbieri2728 unfortunately I never got it figured out... my best guess is the guy before me put a new stator in and he may have messed the timing up. Timing is kinda over my head so might have to take it to a mechanic.. keep me posted if you figure anything out!

[@ahmednabee6061]

I have the exact same issue with my 90hp...after about 15minutes of running at idle speed it gets up on plane...cleaned my carbs and will try to sort the fuel pump...will try again this weekend hopefully

[@unappropriate1]

Question. It looks like you pulled off clear and black discs from your disassembly but only put on the clear on reinstall. My Sierra kit came with both. How do I know which to install?

[@nateanderson5665]

I'm having issues with my 2004 mercury 50hp running. I'm loosing my prime and fuel bulb gets soft and engine dies out. If you reach back and manually pump it, it picks back up for a few minutes and does it again. I was thinking either the filter or bulb/fuel line. I replaced those and it didnt fix anything. It mainly does it while idling or going slow. When I'm at full throttle it seems to run great. Do you think a fuel pump could be the culprit? That's my next best guess.

[@sosikcodriftingakagaffa_ma2711]

Easy to understand good vid very helpful nice one 👌 ✌️

[@jennyg4827]

My existing pump comes with little round rubber diaphragm under plastic check valves which are in most kits but the cheaper kits are not including and your mercury diagrams don't show they are necessary....what should I do? One of mine is torn so hoping yThat is my fuel issue...thoughts.?

[@Buckdog37]

Know where I could get this kit for a 93 mercury 200 efi? And not have to wait 2 to 3 weeks? Great video.

[@joeslont7510]

Are u not suppose to use the rubber disc for the check valve just replace it with the clear one cause I have to rebuild the same pump?

[@Eric-fq5wx]

Do you know why my new pump did not come with the fitting for the hose to the crankcase? Mine also has a hose for the oil inlet on the pump

[@marksimonetti9244]

Great video, just rebuilt mine and running fine. I'm a little bit puzzled found what seems like yellowish plastic in pump and didn't come from any of the parts in the pump. Any ideas, thanks for the video it was a great help.

[@HRIservicesllcSturgeonBay]

No clue, maybe something from the fuel tank or dropped in the fuel tank, if the filter is after the pump? Enjoy your boat!

[@johnayers8990]

@Mark Simonetti- pieces of plastic may have come from old fuel lines? Just a thought. Hope you figured it out

[@stuartlaw3575]

hi Great video it really helps ,my new gaskets one is different from my original gasket ,on pump the large solid gasket 2 off ,on my original has brass mess incorporated in it on one only of them but new gasket is just rubber ,Is this a mod my engine Mariner 75 hp 2004 made in Belguim

[@mkruse1058]

Will this part/kit number applicable to my 1997 Mercury 125 HP ELPTO?

[@harryjelffs7570]

Great video, I’ve got an issue on my 90hp merc 2 stroke 1997 where fuel has leaked back into the oil reservoir tank! How do I go about checking the one way valve on the pump to make sure it working? Should I change the diaphragm as well?

[@HRIservicesllcSturgeonBay]

Please give me a serial number Harry, so I know I am looking at the correct information.

[@harryjelffs7570]

Hi Ricky! Thanks for the reply, I will go check my boat serial number now, I’m completely lost as to what would be causing it to push fuel back into the oil reservoir. I’ll get back to you in 30 mins once I have it! Thanks

[@harryjelffs7570]

I didn’t managed to do it today but the engine is a ME- 90 ELPTO. It’s around 1997 2 stroke 3 cylinder! I personally think it’s the fuel pump causing fuel to push back through the oil pump into the oil tank, cheers rick

[@HRIservicesllcSturgeonBay]

@@harryjelffs7570 I need a number like 0A996142, could start with 0B, 0C, 0D, 0E, 0F or 0G.

[@ruben41881]

Are all the fuel pumps supposed to make a noise when switched to on? I have a Mercury 2.0 BackMax that doesn’t make noise and was wondering if that meant pump is going bad.

[@ruben41881]

It’s a 135 Mercury 2.0L BackMax

[@nickdes1977]

Hi, I really enjoy the video, just wondering if you think our 1995 115 hp mercury needs a new fuel pump, we only can get up to 10 mph. Maybe rebuild it as you did? It will not go past 2500 rpm

[@HRIservicesllcSturgeonBay]

That is very hard to say, did it sit with gas in for a while? Have the carburetors ever been rebuilt? Find your engine serial number and answer the questions I just asked and I will look a little deeper.

[@nickdes1977]

@@HRIservicesllcSturgeonBay Here is the Engine code OG212975 We never had anything go wrong with the boat, 1995, my son took it out boating and he called and said the boat would only go about 10 mph at 2500 rpm, He got home and I inspected and found the line from the oil pump to the gas line was cracked and leaking bad. I replaced it and the boat still does not go past 10 mph. Any help would be appreciated. Thanks

[@HRIservicesllcSturgeonBay]

@@nickdes1977 I would start out by removing the spark plugs and see what they look like. They should be a coca brown, if they are wet, or black, try to determine by smell and touch if it is too much fuel or oil? I have concerns with the oil line being broken, that the engine may have been oil starved. Next run a compression check on all four cylinders should be 120 to 140 PSI. All cylinders within 10% of each other is best. My email address is [e-mail] send me pictures of the plugs tips before you touch them.

[@nickdes1977]

@@HRIservicesllcSturgeonBay Good Afternoon, Thank you for your very kind response. I sent the picture to your Email. The plugs actually looked good. Here is what we did so far. 1. Ran a compression check , 1,2,3 had 140 psi, # 4 had 130. Top to bottom is how I listed the numbers .2. My son ran an ohms test on coils, #3 was out, #4 was low, we replaced 3 and 4 3. The plugs and wires were changed last year 20194. 4 Change out fuel filter 5. replaced cracked oil line to the y. 6. We replaced the rectifier needlessly. 7. 7. Change prop as it was obviously bent I think the engine runs on 2 cylinders until you put it in drive . That is what the marina guy told me when we bought it. Thanks so much for any help you can provide. The Engine starts very easy, runs smooth, but just will not come up to speed/RPMS Nick

[@HRIservicesllcSturgeonBay]

@@nickdes1977 we can work through email from here on.

[@chrissmiles4983]

Great Video, thanks for sharing your knowledge

[@HRIservicesllcSturgeonBay]

Glad to help, thanks for watching Chris!

[@chrissmiles4983]

ha! I just reused your knowledge to work on my boat again! haha, THANKS again!

[@riverrivers250]

Where can i order parts... that ships to canada... i think either the fuel pump or carburetor is fucked up on my motor... it starts to hesitate when i get at lesss then half tank of fuel.. like going full throttle and it will just stop/slow down suddenly for a second and go fast again

[@cascivic]

I have a 98 115 Opti that runs and starts pretty good , but will only do 3500 4k under a load. Do you think this could be my problem?

[@HRIservicesllcSturgeonBay]

Does it miss, stumble, or the RPM's just will not increase? I assume you have already changed plugs?

[@cascivic]

@@HRIservicesllcSturgeonBay no miss or stumble. I got new plugs and am changing this week. So frustrating . Unplugged both the low oil and heat sensor and no change .

[@HRIservicesllcSturgeonBay]

@@cascivic AssumIng all the plugs looked the same when you pulled them. Then I would go into the carbs make sure you verify that the main jets are free of all fuel gunk/gum. Replace needle and seats, sometimes the needle tips react to ethanol and other additives, if the needle tip is crooked you float setting will be incorrect, rich or lean. You might as well rebuild the fuel pump while your in there. I have a manual I can send you info, email me [e-mail], let me know the serial number and how many cylinders.

[@cascivic]

@@HRIservicesllcSturgeonBay thanks for your help. I took front airbox off to get to the carbs to get numbers for the rebuild kits... Tried draining the bowls while I was there and the bottom carb no gas spilled out and it looks full of 2 stroke oil (bluish thick gunk). Def have to get in there this weekend

[@HRIservicesllcSturgeonBay]

@@cascivic I believe you found the problem, not sure how it would be full of injection oil, and no fuel. Let me know what you find? Curious!

[@detuneCH]

Great video - although at 8'45 it looks to me like when you cleaned off the old gasket that you let the debris fall into the body of the pump... Ouch ;-)

[@HRIservicesllcSturgeonBay]

Colum Horgan, not all footage makes it into the video or the videos would be much longer. I am sure I blew it out before I assembled it. Been running great, on it's third year now. Thanks for watching and the comment.

[@santiagoalcalde9973]

ye, I noted too. It is better to change the old gasket before mounting thye pump.

[@bonners4719]

Hiya. Thanks for the video. Can I ask for a favour? We have the exact same engine as you (at least it looks like it from video), a 90 elpto mariner. We have no model number on the serial number sticker, and the sticker is damaged so we don't know the serial number haha can't make it up. Please can you tell us what model yours is so we can get a manual for ours. Sorry about this, you are the best lead we have atm. Cheers in advance!

[@dinoyochi6947]

when i crank the engine with the fuel line from fuel pump to carb disconnected , no fuel is coming out the pump, is it the reason why my engine is not starting ?

[@brolli123]

Great video, Tried to rebuild mine from a 1995 Force 70 with a kit but all the plastic pins broke when trying to press them in. Can those be bought seperate somewhere?

[@bbreede1]

I had the exact same problem. They wouldn't move down at all. Did you have to buy a new kit?

[@seankinal858]

Part instructions say to break off nylon pins from retainer, THEN pound the broken off pin into retainer flush. However, I like your way better.

[@mahdikolsi620]

Hello i have a 1995 mercury 115 and i have problem on it so the engine make speed only if i press the key 1 .2 or 3 times i fix the carburetor and its the same problem btw i removed oil tank and it become the oil mixed with gasoline by myself i need help please 😩

[@jdunn0520]

My instructions say when changing to nylon retainers I must have enlarge the holes with a drill bit. I didn’t notice that but they seemed to seat good. Now it will not start the engine and the spark plugs keep getting fouled with fuel. Any ideas???

[@sulimandc3467]

I like to know the amount of the oil line which is going to T-valve??

[@devinnunley1157]

Lock tight when putting bolts back torque spec?

[@bigwaves2824]

trying to add my oil injection back up on mine where did the hose go to other side of motor thats on first fuel line hose before the oil hose i ant figure it out

[@SG-vb3fy]

What kit would work on my 2.0L 150 HP blackmax 18-7817?

[@HRIservicesllcSturgeonBay]

Please give the year made, and the serial number, and I will look it up.

[@HRIservicesllcSturgeonBay]

There are many different 150 HP models from inline to V-6, without the serial number I cannot give you the exact number, kit but the number you gave me does reference back to a 150HP Black max. Did you find a resolution?

[@x--LeethaL--x]

Was fuel leaking out around the lower?.

[@iveneverdonethisbefore8390]

Thanks for posting

[@HRIservicesllcSturgeonBay]

You bet Graham glad to help.

[@ghostrider9303]

Great video, thanks!

[@HRIservicesllcSturgeonBay]

Johnny, thank you, and thanks for the comment.

[@willard147258369]

Well done ......

[@HRIservicesllcSturgeonBay]

Thank you glad you enjoyed it!

[@bradbenson3375]

Good video! Thanks.

[@HRIservicesllcSturgeonBay]

Anytime, thanks for watching.

[@25682allen]

Hey I noticed the new check valve is plastic but old one is rubber...only the plastic one comes in the kit

[@darksidedemi]

More durable.

[@matthewkeel7756]

The molded “Y” hose you removed that the oil mixes in. What is it called? I need one. Thank you.

[@boostedturbotom]

Great video !!

[@bigmike1453]

Awesome !

[@edwardminshew8018]

Where is the electric chock on a 125 Mercury out board it’s a 1999 model

[@HRIservicesllcSturgeonBay]

To find that I need more info, 2 stroke or 4 stroke, how many cylinders, and the serial number.

[@davesmith2733]

The check valves are now plastic .withstands ethanol better

[@HRIservicesllcSturgeonBay]

Thanks Dave! Appreciate the input.

[@garya1625]

Apparently it was too difficult for them to have audio...

[@wlc1980]

Another silent how to video, WTF? Man up and speak up next time, it would make for a better how to video.

[@HRIservicesllcSturgeonBay]

I prefer the talking videos myself also, but sometimes I write them out. Thanks for the comment Tracy.