.I see 2 different numbers posted for that tag----I can not put my hands on your motor.-----Compression seems low.----Test with another gauge.---Good luck with it.
Have never seen a stainless one on a Johnson 2 , 3 , 4 , 6 cylinder that was broken.----Stuck open by a screw , sound blanket and mouse nest on occasion.
I believe the motor is NOT running on all 3 cylinders !------It sounds awful to me.-----I am not looking for the number of the carburetor bowl !!----Read carefully-----The number on that metal tag is ???----The number on the high speed jet ( orifice plug ) is ????----Read the questions and...
What numbers are on the tag on the upper carburetor ?----What number is on the high speed jet ( orifice plug ) inside the carburetor bowl. ?-----Carburetors do not appear to have slow speed mixture adjustment feature.----The idle air jet seems to have been tampered with and abused !
Your motor is perhaps an 85 model or newer and 60 / 70 HP.---Perhaps had automatic oil injection that has been removed.-----Fuel pump is not mounted correctly.----So simply ignore my advice in post #7-----
You did clean the high speed jet ( orifice plug ) that id found in the bottom of the bowl ?-----Post some pictures of this motor if no model # is found.
They are very durable and rarely need changing.----What is your motor doing / not doing ?----Why are you working on these reeds ?----Any pictures of what you are describing ?
Top plug might not be firing.----Fuel pump diaphragm might be ruptured.----Throttle plate might be opening too early.----Low speed mixture might need to be adjusted / opened.---Easy diagnosis and easy fixes.
Find yourself a 6 HP 2 stroke Johnson / Evinrude.----1966 to 1979.-----Wonderful motors.-----Easy / cheap to maintain.-----visit ----leroysramblings-----To learn about older motors.
The boat that I am doing had the bow eye bolted through a piece of wood.------It now has 2 bow eyes in place with " non rotting " material.------I regularly visit a place where the yard is littered with boats.-----Fortunately the former owners listened to the advice when they were told.-----"...
Those use the same lower unit as their 2 strokes.-----Treid and proven water pumps.----Have to ask.-----Water is 15 cm above the impeller when testing?
Post the compression numbers on that 50 year old motor.----Set the low speed needles at 5/8th turn out.---Is thermostat in place and working ?------Put boat in water and do final adjusting of low speed mixture.-----You should also install a new water pump impeller now.
