Mercury Outboards MerCarbs Rebuild/Reassembly 80hp 85hp 75hp carbs

[@FullThrottleGarage69]

damn I just did these same carbs last night and was looking for a video on it this is the only one I found! I should have known you would have one!

[@REDRIVER-xt2ie]

That kid knows good content 🫡

[@Hansahola]

Hey Son, can’t tell you how much we appreciate these merc vids! Wouldn’t have much of a clue without them. Curious if you have any insight on a weird goose chase we’ve been on with our 1982 90hp tower of power. It’s been nothing but a headache since getting it.. was really hard getting it to start originally but after we got it going it would start somewhat easily. It currently just about dies every-time it’s in gear. Come to find out it was only running on 3 cylinders. We had spark on cyclinders 1,3, and 5. So we replaced the even cylinders switch box with an oem merc one. Weird thing is once we installed it and tested it on the water the boat was doing pretty much the same thing. Dying under load with anything above 2mph roughly. Checked spark again and we only have spark on cylinders 2,4, and 6 now 😑 extremely confused at this point. It also starts surprisingly easy on 3 cylinders now.. Everything is hooked up correctly to my knowledge. Our triggers and stator tested good per your videos and now I’m completely stumped 🫠. Would greatly appreciate any ideas you might have! Thanks Hans

[@MerCSonL6]

Switchboxes should be both replaced when one goes bad. Also, be sure the bias wires are connected. Also, you should be able see fuel in brass venturis when you prime the bulb for easier starting and idling (tangs need adjusted if you do not see fuel in the venturis). Son

[@giloquendo]

Do you have a video on how to remove those carbs from engine

[@MerCSonL6]

There's just 4 bolts and fuel lines to remove. Son

[@stevejackson4136]

When I did my 78 80 hp L4, the book was so unclear on where to measure the float height. One had to be redone a couple of times because it poured gas out. Too much bounce on the tang. Finally got it.

[@stephanswatlowski5334]

I am having the exact same issue same motor

[@stephanswatlowski5334]

Do you have a measurement for the correct float height on that carb?

[@stevejackson4136]

11/16” from the base of carb to bottom edge of float. Hold the carb up to eye level and you will note it is horizontal.

[@BillRied1]

I'm trying to revive a 1977 850 4-cyl that has been stored in a barn for 30 years. Your videos have been a huge help; have replaced stator, trigger, rebuilt fuel pump, impeller, replaced crusty engine wiring, cleaned carbs, replaced needle and seat. Engine runs well at medium to high speed, but idles rough, stalls when going into gear, and chugs/surges at ~ 5 mph. Have tried adjusting mixture screws but it hasn't helped (but I can make it worse). Will probably remove carbs again and check if floats are set correctly (per your "bounce" video). And then will try to get ahold of a timing light to check timing (and Link/Sync)...but was wondering if you thought the reeds might be the problem. What are the symptoms of bad reeds and is there a way to tell if it's the problem without disassembling the engine and removing the crank?

[@MerCSonL6]

Pump the primer bulb and hit the front venturi (brass n in the middle) with compressed air. Fuel should splash into the carb throat from the main. I like to be able to visually see fuel in the venturi just enough not to leak. But it is difficult with these carbs. As far as reeds, put a piece of paper in front of the carb while it's running. It should be pulling air in, not out, and equally on both. Hope this helps. Son

[@FLA-MNHockeyGuy]

I have these carbs on my 1978/82 Merc 70hp L3. I have a few questions maybe you could help me with: 1) The main jet is .072", does performance improve if I replace with .086" main jets? 2) The surface of the main jet itself is not smooth and shiny, but rough. Do you feel this jet surface not being smooth makes a difference in top speed RPM? 3) The surface of the plastic venturi in both carb throats is rough, like bumpy. How critical do you feel it is to have the venturi smooth, versus rough?

[@farisalyarubi7045]

Hey sir First of all, I am one of your fans, and I also have a Marcury engine 2 stroke (80hp), I think it was Manufactured in the 1980’s, It has not been working for more than 25 years due to electrical faults, and I fixed it by my self at home I would have had a problem with the carburettor It sprays the gasoline instead of sucking it in. When I searched for this problem, it became clear to me that there is a part it's called reed vale My question is, is this spare part available for this model of thesis engines ????

[@MerCSonL6]

Have you rebuilt the fuel system??

[@Matthew-oo2nk]

I really appreciate this video, I got an old boat from my grandpa and I have been working through the problems one by one. They just seem to keep on coming at me though. Do you have a video on how to properly adjust the throttle and shifting lines for one of these 1978 beats?

[@MerCSonL6]

kzbin.info/www/bejne/iYa2eH5od82Zq9k

[@giloquendo]

Great video. What's the part number for the rebuild kit I need to rebuild my carbs 1986 mercury 75hp

[@MerCSonL6]

Carb kit link is in the description my friend. Son

[@jamajose]

Hi, where can I buy the all carburator kit for my 75hp mercury outboard

[@lealamb]

How do you sync these carbs? When I have the black plastic shaft linking the two carbs the butterfly valves don't open at exactly the same time. I linked them together and laid them flat on the bench top and the "top" butterfly valve starts opening before the lower does. I don't see anywhere to adjust this. 🤷‍♂️

[@MerCSonL6]

It's on the bottom carb to. The black linkage pivots when you loosen the 8mm bolt.

[@erickinapodaca5626]

Hola saludos esperando que estés muy bien disculpa se consiguen carburadores nuevos de este mismo estilo ? Tengo un mariner 60hp con estos carburadores

[@koolaid1611]

Hey Son. Do you have any idea where I could get new linkage for syncing the carbs? I have this same project going on and at some point broke the plastic pieces that hold the linkage together.

[@MerCSonL6]

Marineengine.com

[@FullThrottleGarage69]

love your videos bro!

[@vandos11]

hey man really enjoy your videos I love the old mercy too I recently got a 1968 mercury 35hp and I was hoping you could help how do I remove the reverse gear because I damaged my bearing carrier when I was using a seal puller to remove prop shaft seals now I gotta order new bearing carrier but how do I get reverse gear and bearings into new carrier ?

[@MerCSonL6]

kzbin.info/www/bejne/fmqwoIapbcaNq8k

[@MerCSonL6]

Same principles. Just a larger gearcase. Son

[@chaisawrob8259]

Hey there. This is a little off topic. But I'm in the hunt for a few pistons for a 69 1250hp . Is there any other year piston that would work in it? Any help would be greatly appreciated. Thanks again for your time.

[@MerCSonL6]

Pistons before 1972-1973 will work. They with to high dome Pistons during that time frame. Son

[@Loompius]

I saw the comment where you told the guy you would do this video for him. Dude you're amazing, love the channel. Son, what do you think of metal needle and metal seat?? Last two carb rebuilds I've done (1981 johnson 60, and 1982 Merc 80) both had metal needle/seats in the kit. Johnson had no leaks or anything, runs awesome, the Merc is currently being built. Just curious about your thoughts on it!

[@MerCSonL6]

Thanks for the support. I typically try to stick with oem patterns buuuut if the shoe fits wear it! Son

[@danafavinger6139]

Could you tell me where I find the numbers on these carbs so I can get a rebuild kit. Or maybe where to look, I have a 850 merc with two of these carbs. Thanks much appreciated

[@MerCSonL6]

Marineengine.com is a great place to start. Son

[@FullThrottleGarage69]

do you have a fuel pump rebuild video on this motor bro?

[@MerCSonL6]

I do not. However it's extremely easy to do. You just have to place the gaskets correctly. Son

[@nathannewcomb6556]

do you know where i could find a carb drain plug/main jet for one of these carbs? I have found out that one of mine has broke. thank you

[@MerCSonL6]

I had the same issue. I had to purchase a used carb to get that piece. Marineengine.com might have them in stock. Worth a shot. Son

[@nathannewcomb6556]

@@MerCSonL6 do you happen to know if the plug and the main jet are all one piece or does the plug screw in after the main jet? Thanks

[@MerCSonL6]

@@nathannewcomb6556 the main jet screws into the plug. Son

[@stevestewart3816]

Great video i had my carb link break on me. I gotta order a new one soon. I want to clean my carbs and adjust them but i dont know how to fine tune the carbs(jet wise) also since id be reokacing the old choke rod with new hiw do you make sure they are in sync

[@koolaid1611]

Hi Steve I’m having the same problem did you find new carb link? If so do you have a link?

[@stevestewart3816]

@@koolaid1611 I ended up taking mine to a marine mechanic

[@WhiskeyWood_Studio]

Question here man. my carbs are very similar to my 1984 60hp Merc that I'm rebuilding. my problem is the main jet plug (OEM # 6199) is broke on one (I over tightened and broke the bolt head off). Ebay, Amazon, and all suppliers I've looked into have no longer have that part. what you think I should do as a work around??

[@MerCSonL6]

I've has that happen. It's a hard lesson learned my friend. I had to but a used carb just for that 1 part. You can try marineengine.com. Son

[@WhiskeyWood_Studio]

@@MerCSonL6 unfortunately, there's no one out there that I've found yet with the exact carb. Think I could get away with just taking the broken part off and plugging the hole with the right size hex nut?

[@MerCSonL6]

@@WhiskeyWood_Studio that will not work. Son

[@MerCSonL6]

@@WhiskeyWood_Studio www.ebay.com/itm/175353607291?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=xXJv1hAYQ6G&sssrc=2349624&ssuid=c7HxGSEnQjG&var=&widget_ver=artemis&media=COPY

[@MerCSonL6]

www.ebay.com/itm/334495866754?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=uij2MpJsSKy&sssrc=2349624&ssuid=c7HxGSEnQjG&var=&widget_ver=artemis&media=COPY

[@Depsay5566]

I’ve got an old 80hp 800 on a 67 MFG trying to rebuild the carbs but unsure on how to pull the carbs without removing the coil. I have zero knowledge on how to remove these from a out board and have only worked on carbs from atvs

[@Depsay5566]

Where do you buy parts from to rebuild these? And where could I find a manual?

[@MerCSonL6]

Amazon and ebay are good sources. A 67 unfortunately you'll have to take a lot of parts off to get to the carbs. Son

[@stephanswatlowski5334]

I just had my carbs rebuilt. The primer bulb will not get hard and pours gas out of the air intake on the carbs. Float level is set to 11/16 as described in the video. Any help? It is on an 80hp mercury. Carb is identical to the one you are working on here. Love your videos man

[@MerCSonL6]

Set the floats lower (when upside down). Just a little so it doesn't suffocate the engine. Also, check your fuel pump. Bulb should stay hard due to the positive and negative pressure from the crankcase. Son

[@jakeweaver6860]

i just got a 1979 80hp thunderbolt 2stroke mercury, are you available for a chat?

[@MerCSonL6]

Yes.

[@farisalyarubi7045]

I hope you will respond to my comment the 1983 mercury engine If it has a reed valve?? Or not

[@MerCSonL6]

Yea. Several.

[@farisalyarubi7045]

Thanks for your respond can you make a video that shows how to repair

[@MerCSonL6]

@Faris Alyarubi they can not be repaired. They have to be replaced of cracked are warped. The intake manifold needs removed. The bearings wrap around the crank shaft. I have a video.....

[@farisalyarubi7045]

Thanks bro for your information can you do for me a favour share me the video or send me a name of that video Thank you again

[@josuevaldes31]

Where are you located?

[@MerCSonL6]

25405

[@josuevaldes31]

I wish we had someone with that much experience here in town other then the marinas you are pretty good at what you do I've learned quite of bit in the last cuple of days watching your videos thanks for taking the time and share your knowledge!!!

[@robertscott5458]

need a different camera person , as the sure with the words while talking is bad

[@caryhendrickson481]

Great video until the woman started talking over you! Why would you let her yap like that? Seemed more about her than the rebuild! Could not get through video. Sad it was some good info.

[@MerCSonL6]

Trying to get my kids involved. It's rough and I agree.

[@leonardthomas318]

Really need to get the kid out of the video Really

[@MerCSonL6]

No. Son

[@mitchwinterton6984]

Do you ya e a contact number I’m at a loss on my 73 850 merc need help!

[@MerCSonL6]

Email?