Johnson 150 carb rebuild

[omcforever]

Make sure mating surfaces are dry and clean before torquing...

[Ky86cajun]

So all my recirculation check valves are bad except for two so I’m going to replace them all I’m having a hard time finding them where’s a good place to order them? Also this might seem stupid but I can’t find mixture screws anywhere on the carbs… Where do you adjust the mixture?

[omcforever]

So all my recirculation check valves are bad except for two so I’m going to replace them all I’m having a hard time finding them where’s a good place to order them? Also this might seem stupid but I can’t find mixture screws anywhere on the carbs… Where do you adjust the mixture?

There are no mixture screws. Idle mixture is controlled/set by idle air orifices in side top of carb throats.

[omcforever]

item #3

https://www.boats.net/catalog/johnso...coh/carburetor

[omcforever]

item #7 are the recirc valves...

https://www.boats.net/catalog/johnso...ntake-manifold

[Ky86cajun]

So there’s no way to fine tune the carbs except the overall idle adjustment on the side?

[omcforever]

So there’s no way to fine tune the carbs except the overall idle adjustment on the side?

Fine tune idle speed which is set in a tank or at the lake and not on the muffs. Muffs dont load the motor.

[omcforever]

Idle in gear 650 rpm plus or minus 50 rpm's.

[Ky86cajun]

Well I finallly got the carbs apart, cleaned, and back together, I've had alot going on lately and just now got back to working on it. I found out after looking at the plug on top of the head that it's a 1986 and not a 1985 even though it's listed as a 85 on the title, the model number is J150STLCDC. I took off the electric fuel pump and replaced all fuel lines while I was at it. Is there any articles online or here that goes through the process of syncing the carbs? I looked but didn't see any for my engine, most were newer models unless I just overlooked them.

[ChampioNman]

Most techs have the service manual. May try googling Dangar marine.

[Ky86cajun]

Thank you omcforever for the help, I finally got the boat back on the water today and the difference was almost unbelievable. It ran great!!!

[omcforever]

Thank you omcforever for the help, I finally got the boat back on the water today and the difference was almost unbelievable. It ran great!!!