Johnson carb rebuild

I rebuild a Johnson V4 carb.
#outboard #boat #diy

[@meo-my5363]

I appreciate what you have shared in this video... the anxiety I have about boat carbs is not actually rebuilding them, but is installing them back on the engine and setting them up so that they run in sync... thanks

[@danle746]

The plastic pieces that you’re talking about is actually ethanol fuel which is the culprit for clogging carburetors and many types of engines.

[@darcy32171]

From one Canadian to another: Great vid!!!!! Just bought a 1973 Johnson 25hp. Runs great, but I`m going to clean the carb anyhow (not sure when it was done last). Carb kit will be in today! GREAT tips on removing/installing the little frost plugs!!!!!!! I`ve always wondered how the heck to remove them. Not familiar with boat carbs, but I do 100`s of snowmobile carbs a year, this should be a sinch!!!! Thanks for the video, very clear and precise....thumbs up!!!!!!!

[@ko4nrbs]

Many thanks for your time!! Bill

[@steveduffy6608]

Good video. Hopefully can get my johnson sorted!! Very informative. Thanks

[@givemeroty]

Oh love your info!

[@tysonthao]

Nice guy. Thanks bro

[@eddiebarton1611]

Im rebuilding the carb on my 86 150. This vid was a big help sure ill do just fine. Ive worked on chainsaw carbs. As well as working on diesel and gas motors mainly diesel im pretty good with mechanics. So hopefully ill have no isses

[@tdsport2]

thank you"""""""""""love johnson

[@corkybritt4276]

I have put a new fuel line , power pack , coil ,carbs cleaned , fuel pump , plugs but it still won't quit bogging down on plane ! Starts an idles great but you pull the plug an they are real dry like to much air an no fuel !!! Have tried 2 different 6 gal tanks besides my built in tank of fuel an does the same on all !!!! Thank you for your time !! Love you videos

[@anon7039]

reed valves? have you done a compression check?

[@australianskateboardkits7017]

Any luck fixing this Corky? I have the same problem.

[@filleterluke]

i finally got my johnson 25seahorse running after she sat under water for to tides. sprayed wd40 everywhere but shop said be cheaoer to buy another cheap engine. then she seized but i unseized her, cleaned the salt outta carb. obviously there was more to it than that but i learned alot from it.i narrowed it down to carb cos she started on easy start spray(i know, i'm a turd, dont use that for these)but she fired up. anyway, useful vid, if only i watched it first.

[@TheMarineDoctor]

The older ones did not have the spring/clip. Its used to keep the needle from sticking.

[@shawnkuntz]

Should note, when you put replace those frost caps, you put them in like you are putting a contact lens on an eye. They should not concave into the chamber but should be like putting a dome on the chambers. When you tap them down they will then expand. If you do it opposite, they won't stay in place.

[@RoadKingTurk]

Carburetors, runs good but lowers has a stubble and I have to use electric choke to keep it running

[@kevinhill3549]

I adjusted the choke plate started right away thanks. why after running it is it hard to start. going to take it out today and see how it runs with new adjustment

[@TheMarineDoctor]

1.5 for the first one, .5 for the second one. This includes taking them off and putting them back on. A test is then run on the dyno for $105. So typically $300-$400 by the time its done

[@TheMarineDoctor]

It can yes...but it should also effect it on the muffs too.

[@edincharleston]

You da man!

[@TheMarineDoctor]

I have found the rubber tip ones were having issues with the alcohol. Metal is the way to go. They were sticking shut.

[@TheMarineDoctor]

Remove one or more of the primer lines and verify the flow of fuel. Activate the primer while squeezing the bulb.

[@literbikedoc]

Hey dude - can you post a vid re fitment of a water pressure gauge to the the V4 / V6 Johnson / Evinrude ? I have an early 90's V4 VRO . Need to know the best spot on the powerhead for the sender / capillery depending on type of gauge used . Great vids keep up the good work :)

[@manny097]

the spring is something new, Im cleaning 1968 9.5 seahorse, and once I open the carbs there was no spring, i order a new needle from sierra and it came with the spring, I guess the spring is for when you lay the outboard on its side or down, so the needle doesn't get stuck

[@tarpon22]

Great video, thanks for posting it. Do Yamaha carbs need the float adjusted? I'm rebuilding a Teikei carb from a 1996 c25elru 2 stroke. It has a round black float.

[@xboxdude360]

Woot first comment! I am a fan of your site too :)

[@TheMarineDoctor]

You will need to verify that the primer is indeed allowing fuel through. It should click. Take the outlet hose off and activate it. Then squeeze the primer bulb. Fuel should squirt out.

[@mercmack]

I have a later model V-4 johnrude...that has primer system no choke butterflys..has good compresson/spark..cleaned carbs as per your video but still real hard to start..less you spry into carbs with WD40/eather..(i know a no no) made sure the primer is working and all million small hoses are clean or not split..any ideas..

[@TheMarineDoctor]

Yes, that is correct.

[@TheMarineDoctor]

1.5 for the first one, .5 for the second one. This includes taking them off and putting them back on. A test is then run on the dyno for $105. So typically $300-$400 by the time its done TMD

[@TheMarineDoctor]

Sorry, no vids on those carbs. But they are very straight forward. When working on them...replace the gaskets, floats and needle/seats. That way you will not have to go back into them.

[@TheMarineDoctor]

1.5 turns is the norm. Then adjust from there. Does it actually have adjustable jets?

[@byrams360]

Great video. I have a 82 johnson 150hp j150tlcnm. when I start it she idles at about 1200 rpm. well above what the specs say. Any suggestions? Thanks.

[@TheMarineDoctor]

The engine is running lean or too slow. Cleaning the carbs my alleviate the problem...or adjusting them richer.

[@thedragonfarm]

I have a 1998 fast strike I'm sure it's a little different right? I'm pretty handy but this definitely scares me. the engine is running good I just would like to get in there and see what shape I'm in and just rebuild them to make sure I won't have issues later on. is it hard to do on the 175 because they want $700 to rebuild mine.

[@christersandberg8611]

My carb just stopped working while running. Nice and clean, gas pumping in. Switched to an older, dirty carb, and the engine runs well again. What may be the problem? Cant find anything that looks wrong, and it´s nice and clean :(

[@ackpelon]

i have a problem with my 1998 johnson 2 stroke 3 cylinders i toke it to the water for the first time sense last year and i did the winterize.but start at slow speed normal but when i go to 3/4 of the throttle to full speed start to struggle it doesn't die it just keep fighting to keep going and like after 5 mnts it goes back to normal but only for 1 mnt. i empty the fuel thank and lines new fuel filter and spark plugs and toke the carbs out to take the old fuel. but nothing could be jet needle?

[@rockandrollwithrage]

I have a 1978 evinrude 115, have the carbs apart, rebuilding them tomorrow, looks like the exact same carb, I don't recall seeing any springs on the needle or float, do some not have them or did somebody rebuild the thing wrong in the past?

[@mazatraza]

can you hint me in the correct adjustment turn all the way in and 3 1/2 turns out or something >?????

[@caseyfleming4353]

I have a 1989 48 hp Johnson outboard. Have had it for awhile, never ran just right since I've had it. Used to start and run then it got to where I had to start it and immeditatly give it full throttle to keep it running. And now it won't start. Replaced fuel pump, spark plugs. Still no luck. Should I clean the carb or rebuild it?

[@TheMarineDoctor]

Yes

[@mazatraza]

mate ive got a 235 early 80's re built it my self coz a dodgy mechanic blew my 2k on all new parts buy not changeing thebottom baring..... ive got it going great but i want to tune the carbs jets what am i ment to have them screwed in and out to ???? how do i adjust the richnes and leanness on them prperly as i can see that there all running a bit diferent as there is diferences on the pistons some are more oily than outhers

[@JasonLefevers]

I have a 1983 50hp Johnson (J50BELCTA) that runs fine on the muffs on land but doesn't idle and stalls in the water. After taking the carb air covers off I noticed that one of the screw plugs to the idle jet on the top portion of the carb was completely missing. Would this be the culprit causing my idling issues?

[@TheMarineDoctor]

It might be a bad connector or a simple broken hose. I don't see it being very expensive. UNLESS...its a part directly on the carb.

[@ct1762]

love the video , but nothing like using a camera that was outdated even back in 08' for a small carb job

[@myballasjuk]

i have a 115 mariner motor and the carbs differ from normal carbs . the float seems to be in a tube and the needle apears to be working on two thin plates for a setting . any help on those

[@flwhitesnake]

Would love to have seen you take the carb of the engine...I'm a noob.

[@SavageHmr]

Once you take out the plugs you have to replace with new ones right??

[@potatoman25]

Hey thanks for the video! I have the exact carbs on my evinrude 115 v4 and I just have a question. When I got this boat it had not run for years and when I pulled off the carbs and took the bowls off they did not have any jets inside of the bowls. Does the engine need these jets in order to run properly? The boat will run fine with a garden hose on the trailer, but it won't run when the leg is submerged in the lake thank you

[@TheMarineDoctor]

You 100% need the jetting.

[@TheMarineDoctor]

Early 80s, but the carbs are similar

[@daynelindquist4696]

Hey. I dont know of you remember me but i had the 100hp johnson javilin and it doesnt run good at slow speed but it runs really good at fast speeds. I already rebuilt the carb and it runs the same. If i sit there and squezze the fuel ball at low speed it runs better. It seems to me that it is not getting enough fuel at low speeds. How can I fix that. Do i need bigger jets?

[@Lars576]

I have a friend who told me that outboard motors are a lot more expensive to work on than inboard/outboards ... Is this true?

[@lorenzonreyes1]

Hey, I got a problem with my 1991 2 stroke 4 HP Johnson. I don't know the model but when I go to pump the gas in it sprays from the end of the tube entering the engine and won't flow through. What should I do. How much will it cost to fix it myself?

[@TheMarineDoctor]

I could be the accel pump in the carb.

[@kevinhill3549]

turned out it was the choke that needed adjustment

[@tysonthao]

I have done a crab rebuild on my 115 rude n still be leaking gas like hell. I follow your step. I'm lost n needed help.

[@TheMarineDoctor]

Sao Thao The needle and seats or the floats are worn or not set properly.

[@mattcorfield7360]

Hey, great video! I have a 1970 85093d. When disassembling, what is the proper way to remove the needle levers so the silencer base can be removed? This 1970 motor is in awesome shape and I don't want to snap a plastic part for lack of instruction. Also, the manual choke spring was not attached and the exploded parts diagram is no help as to where the spring hooks. Any help would be appreciated. Thanks, Matt C.

[@TheMarineDoctor]

+Matt Corfield I just pry them off....then actually leave them off. That way you can set the carbs each the way they need to be. Move the choke assembly and you should see where the spring will attach.

[@charlestucker233]

i have a 2.5 omc it bogging down on me when i try to open it up could it be card on it

[@shawnkuntz]

what year was this? Would this be comparable to a 1970 115 evinrude?

[@1984KCHEVY]

greetings from caracas, Venezuela ,, excellent video friend, I have a problem with the engine johnson 100 hp 1987, how I turn on the engine and give use to stop for a while (1 hour) does not turn back and I have to prime bulb you turn again, and notice that the carbs ,, I have to do is empty? thanks

[@TheMarineDoctor]

+1984KCHEVY So the carbs appear to empty out as it sits? There is a leak no the engine side somewhere. This allows for air to enter the system....the fuel then drains back. You may also have a stuck check valve on the gas outlet at the tank.

[@dive2663225]

I have the same carbs, except my float bowl cover only has one screw cap on each side, not two as shown in your video. Question if i may...What about lateral play in throttle shaft? is there any seals or bushings to replace in there? cant find any info on that...as well as any parts...shaft..butterflys etc? shed any light on that? thanks

[@ct1762]

i know this is old, but the answer is no... don't sweat a little play. those butterfly units are NOT serviceable, which would explain why you can't find info. no seals in there as well. they don't have anything to do with air flow, only the jets do (some have air jets as well, but not this one).

[@02pimpxxx]

my carbs are from a 78 115 evinrude do you use the orings on the main jet covers which is on the carb body and gaskets on the idle jet covers which are on the bowl somebody I think has rebuilt the carbs and used gaskets on the main jet covers and idle covers aswell.

[@TheMarineDoctor]

I think those older ones used the orings, while newer models used the flat gasket that comes in the kit.

[@coryriley69]

I have a 1983 evinrude 60 hp was wondering if that brass tube u found the piece of plastic in is able to be removed for a better cleaning?

[@TheMarineDoctor]

In normal circumstances, its best to leave the tube where it belongs. Its not often that much debris gets into it.

[@WeeWoo93]

so i have a 1980 johnson 115. basically it idols kinda rough and usually after a minute or so will stall(sometimes even quicker). it also can kinda get up to speed(right around 30 mph) but today had a lot of trouble starting it. took the motor cover off and it started. then later in the day i couldnt get over 10 mph until i took the motor cover off again and it had much more power and i was able to get it up to 30 mph again. it also has random spurts of more power but they're only instantaneous and infrequent. seems like it has more power but just can't get there. any suggestions?

[@TheMarineDoctor]

Check to see that all the wires are in place on the back of the engine and are not shorting through to the cowling clasps. You might also want to check for an exhaust leaking into the cowling.

[@kevinhill3549]

having trouble with my 1978 115hp johnson. Have use starting fluid to get it going then after running won't start back even with fluid.

[@TheMarineDoctor]

Starting fluid will wash the oil away from the cyl walls and the bearing, its not recommended. A mix of 2 stroke oil and gas is a better option, but not entirely safe. Its not a recommended practice. Look for spark and compression. Also verify that the choke plates are closing.

[@thomasflynn642]

I have the same problem with my 1979 115 hp j Johnson v 4 , i completely rebuilt both carbs and new fuel pump! Still no gas to carbs??? what's the problem? RESPOND ASAP

[@tysonthao]

Do they have the silver plugs at the auto place, u know?

[@TheMarineDoctor]

Sorry I do not know. Welsh plugs are the correct name.

[@Jeff-gr2qw]

Evinrude 150 hp wanting to run hot water coming out foot or exhaust and pee tube but wanting to run hot

[@TheMarineDoctor]

Normally if you rebuild the carbs and its done correctly....and it still does not work. The problem lies elsewhere. Compression and Spark are always the place to start. There is no need wasting your time if you are looking in the wrong direction.

[@comet4242]

i have 1984 evinrude 115 i guess i need to do carb rebuild as my engine i rebuilt from scratch with bored cyclinders isnt running right... i was told i have to buy bigger jets if i bored it bigger the .020 but i look on the marineengine site they dont show bigger jets does it matter? and my engine doesnt wanna idle fast i just hope i didnt damged it trying to get it to idle etc

[@TheMarineDoctor]

Good comment...but I have not had a problem yet. Soft jaws would be better.

[@corkybritt4276]

I have a early 80's Johnson 90 hp that takes off great then boggs down on plane at full throttle an just a little less at half throttle! I have paid a boat mechanic at a boat place thru the nose an replaced everything an still not fixed !! Had to just go pick it up cause they said they can't fix !! Please help

[@scwildcat113217]

any luck on this?

[@RoadKingTurk]

How much to rebuild my carbs on a 1984 115 hp Johnson ?

[@MrTbollom]

Spun Prop maybe

[@mikeyo1990]

Hey just took my carbs off my gt150. It's been stalling at idle. Also my primer ball doesn't get hard. I've replaced it and still doesn't get hard, that is why I'm doing the carbs. Am I heading in right direction?

[@TheMarineDoctor]

+Michael O'Connell If the carbs were to blame, fuel would be leaking out of them...Primer Bulb. Stalling could be a number of reasons...does it slow down and die or Pop and die?

[@briancole2876]

I have a 1977 115 hp Johnson that when I start it it goes straight to full throttle. Would that be a stuck jet?

[@TheMarineDoctor]

+Brian Cole Throttle plates are likely stuck open or the timing is advanced for some reason.

[@daynelindquist4696]

I have a 1979 100hp johnson javelin. It runs pretty bad at low speeds on a load but really good at fast speeds on a load. How can i make it run better at low speeds?

[@TheMarineDoctor]

Start off with a compression test to verify the integrity of the engine. If the numbers are 115 or higher, remove and rebuild the carbs. Follow this with a sync and link.

[@daynelindquist4696]

@@TheMarineDoctor I just rebuilt the carbs. I hope that fixes it. It runs good at slow speed out of the water but in the water it runs poorly. Im hopeing to get it in the water in the next cuple of weeks to see of the carb rebuild fixed it.

[@RoadKingTurk]

Would you be interested rebuilding my late 80's

[@davidbyrd8902]

I have a 89 Johnson 40, it will only run if I keep pushing the choke. Any suggestion ?

[@TheMarineDoctor]

Carbs my be full of oil or they are just dirty.

[@wayneblackburn2337]

Good video, but slightly out of focus.

[@TheMarineDoctor]

Noted!

[@RoadKingTurk]

V4 115 hp Johnson

[@AndresTretoiiii]

I have a 1986 evinrude 90 hp v4, and when I start it up and I lower the idle it turns off, could this fix my problem?

[@kelbybullard8115]

Andres Treto1i228iii I have an 84 90hp Evinrude and mine does the same thing. did you fix yours? and if so what was the issue?

[@TheMarineDoctor]

You will want to check the compression and spark first. Then dig into the carbs. The idle speed may be too low, carb plates are misaligned or engine damage.

[@TheMarineDoctor]

Canada TMD

[@mnunez8862]

Can i send you my carbs to get worked on

[@TheMarineDoctor]

+miguel nunez Sure I suppose so.

[@ChaseMadden]

Hi TheMarineDoctor, thanks for your video! I'm wondering if you could offer me some advice diagnosing an issue? I've got a 1988 Johnson 88 SPL and I'm about to do the carb rebuild. I'm curious if a rebuild will fix my issue. I've videoed the engine running with the air silencer off. You can see it here: kzbin.info/www/bejne/oYHLZ31rfc-Uhac Fuel is dumping out of the lower center hole above the lower carb. Is there some other valve that I need to check/replace/clean? Thanks!

[@bobbyletterman4029]

I have a 1982 90hp Evinrude an at an idle it runs rough but when I hammer it runs perfectly, than I idle back down it runs ok for about a minute than it runs rough again. I am thinking that I am flooding my carburetors some how. What would cause my carburetors to flood out? And I know it is not the choke.

[@kelbybullard8115]

Bobby Letterman I have same engine and problem. please share if you've found the issue.