Johnson 15 HP Rebuild; Part 6, Carburetor

[@jato1243]

Hi Brandon, you are by far my favorite KZbinr repair guy! I’ve watched all your videos, at least once, and really appreciate your thoroughness and easy to follow instructions. Just rebuilt my second 15 horse and rebuild the carburetor, and it bogged down on wide-open throttle. swapped the carburetor and that fixed it. What else could be wrong with that original carburetor that would cause that? I am stumped. Thanks and keep up the great job!

[@georgenottachango9807]

Brandon, I had someone rebuild my carb with new parts from a kit and they just couldn't make the engine idle without dying. I doesn't like to accelerate either. I can get it to accelerate if I choke it, but it seems like it's running lean. I checked my compression and it's about 85 pounds on both cylinders. I replaced the sparkplugs too. It's got to be the carburetor, and it looks like I'll have to take it apart myself. What should I look for which would cause these symptoms?

[@willfoley25]

George Nottachango I'm having the same problem on a 15 hp carb. I rebuilt it using the 4-15hp kit. After looking closer, (and rebuilding every single part of the damn powerhead), I still have the same problem. I found the part numbers for the orifice plug (brass plug in the middle of the carb float area) is a different part number from the 9.9 to the 15 hp, on every motor I have researched from 74-81. The orifice plug is NOT available separately, and the carb kit sellers don't have any idea about this issue. I have also noticed the new points are longer from the fiber wiper to the center of pivot, which may be giving me issues as well. I'm gonna turn my.garage upside down tomorrow and look for my.old orifice plug, and hope all my money and work didn't get pissed away. Good luck! Brandon, any experience with either of these issues?

[@lameaxe]

Was a 7-16 wrench to tighten carb mount nuts

[@craftsmandude8916]

GoodStuff65! Yes

[@benorlando7949]

Had my carburator rebuilt on my 1985 Johnson seahorse 15 HP, mechanic said he turned it 1and a half turns out to make it run and it is still hard to start, any ideas ?

[@gonefishing2012]

Old hack saw blade is a good fit for the narrow slot in the seat.

[@zoltanmagyar1273]

Like the series very much,got the same plan w/the same engine next month,. Bending the float,better to use a long nose plier,in the line of the holes.

[@frankbyrd3059]

I have a little 9.9 1974. Can I add electric start to it? Also I LOVE your videos. Very relaxing

[@BrandonsGarage]

Absolutely you can, and given it year, it's one of the cheaper kits.

[@frankbyrd3059]

@@BrandonsGarage thank you, if you wouldn’t mind linking to the right kit the ones I seen are like 300

[@newyota1]

I just did the same carb. about a month ago.It seems that you have to be careful bending the float level like you did.May damage the needle and seat.Also, I noticed the new floats are bigger than the old cork one.I was wondering if you tried it yet and when pumping the primer bulb on fuel line you had issues with over powering the float needle and flooding engine.I can hear gas continueing to squirt in carb.Primer bulb never gets hard and stops the flow.Had it apart twice more and it passes the air test when blowing into the inlet.

[@BrandonsGarage]

Haven't had that problem yet. A 6 HP I did a while ago does what you describe, perhaps its in the primer, not the carb?

[@philb5]

On a 19 9615 hp Johnson you have two jets on the carb One on the side and one facing forward going through the red piece of plastic which one is the high-speed and low-speed were do you start off do you suggest how many turns out 3 turns each thanks

[@АлексШаман]

Дякую друже за гарне відео та повний курс з ремонту чудового двигуна.Я також люблю двигуни Джонсон, особливо серії СіХорс...двигуни дійсно чудові, зроблені навіки...зараз такої якості нажаль немає, а в сіхорсіках мабуть душа Є)) олдскул форева...мої привітання з чудової держави України, де також є шанувальники двигунів Джонсон

[@BrandonsGarage]

Добре, я радий, що мені вдалося допомогти!

[@АлексШаман]

Ми з вами "однієї крові" , я підвісні двигуни ремонтую понад 30 років. Все в Сі Хорсах гарно, єдиний момент, який можна покращити, це вихлоп, точніше звук вихлопу на обертах ХХ(холостого ходу), це важливо для рибалок, які ловлять тролінгом. Додати карман в дейдвуді де отвір для виходу вихлопних газів . За рахунок води=гідрозатвору звук набагато тихіше.Хоча тракторний голос двигунів джонсон особисто мені подобаеться, і його ні з яким іншим не сплутаеш. Володієте українською мовою чи користувалися перекладачем? Дуже приємно отримати від американця відповідь українською мовою, щиро дякую. Дай Вам Бог здоров"я та довгих років щасливого життя.

[@arthurdavila8170]

Did you have to replace the bearing needle valve

[@сергеймолчанов-н7д]

Good afternoon. Explain, please, one question. Muffler 15 hp shorter than 9.9 hp. Is there any additional gasket in or does the exhaust gas get directly into the cavity?

[@lameaxe]

Brandon, do a video on Welch plugs

[@googleplusisdead]

Can you mill the 9.9 carb body out to match the 15 hp and gain hp? Thanks, RichE

[@BrandonsGarage]

I cant, but someone with machinist skills might be able to.

[@jimcatx3090]

Brandon's Garage the main jet is a different size and exhaust and reeds are different

[@delijperijp5599]

i tought the engine colour would be bleu? and can i order the same kits and pakkages here in the netherlands?

[@jimcatx3090]

de lijpe rijp the engines can be green white and blue

[@newyota1]

Did you check compression before and after rebuild?.Just curious if you gained much.Can't wait to see it run.

[@BrandonsGarage]

I did! Im going to make a before and after video when its done.

[@jimcatx3090]

I have 4 15hp carbs for sale

[@craftsmandude8916]

Where are they up for sale

[@BillaBong1]

@@craftsmandude8916 where where i need one

[@craftsmandude8916]

@@BillaBong1 try ebay