My 1977 70HP Johnson is having acceleration problems. I've done the link & synch, removed carbs thrice (duh, how could I have missed one float was upside down and that all 3 needed adjustment?) but still have problems during acceleration. Could it be that one orifice is causing the headache?
This outboard starts and accelerates fine (at home with a hose) but in the water, after warming up, when I accelerate it bogs down, acts as if it wants to cut off, stalling, for a goood 20-30 secs. Then, it will either accelerate well into high rpms or I will have to shift to neutral to avoid damage and try again. Although the last time I was out it appeared that pressing the fuel line bulb and then accelerating solved the problem.
I am at a quandry 'cause this motor has been cannibalized. That is to say, the numbers on the fuel pump are not the one that's supposed to be there (although I've checked and re-checked and eliminated it as the source of my problem) and the carburators numbers are not the ones Johnson says are supposed to be there, but the pics in both of my shop manuals indicate they're the right carbs. The carb numbers (all 3 the same) are 322292. Johnson's website states 03887905 is supposed to be the correct one. Unfortunately, it says nothing about orifice sizes, which leaves me to my question: Is it possible that the one orifice discrepancy is causing the problem? The top orifices (low speed) in carbs 2 & 3 is .303. The top carb (#1) is .330. All 3 carbs have the same high speed orifice (at the lower or bowl section) - 54D, and according to the manual, it is the correct size.
Can anyone out there tell me: a. Is this a possible cause for my acceleration problems?
b. Does anyone know what the right size orifice would be for this carb? I talked the the local Johnson parts dealer and could not get an answer. Should I just go ahead and change this one orifice to see what happens?
I've checked the electrics with an ohms meter and an automotive engine analyzer but of course, its not the same thing as having the right equipment. In any event, it appears that my coils, power pack, and timer base/coils are in working order.
Ah! One other symptom: no matter what I do, the plugs always seem to be wet (not with water but gas/oil). Naw, I'm careful about measuring the right 50:1 mix; that aint it. !@#$%^&*()_+ what gives? HELP!
You guys have come through for me in the past and I know you won't fail me now. Any thoughts, ideas & suggestions will be greatly appreciated
This outboard starts and accelerates fine (at home with a hose) but in the water, after warming up, when I accelerate it bogs down, acts as if it wants to cut off, stalling, for a goood 20-30 secs. Then, it will either accelerate well into high rpms or I will have to shift to neutral to avoid damage and try again. Although the last time I was out it appeared that pressing the fuel line bulb and then accelerating solved the problem.
I am at a quandry 'cause this motor has been cannibalized. That is to say, the numbers on the fuel pump are not the one that's supposed to be there (although I've checked and re-checked and eliminated it as the source of my problem) and the carburators numbers are not the ones Johnson says are supposed to be there, but the pics in both of my shop manuals indicate they're the right carbs. The carb numbers (all 3 the same) are 322292. Johnson's website states 03887905 is supposed to be the correct one. Unfortunately, it says nothing about orifice sizes, which leaves me to my question: Is it possible that the one orifice discrepancy is causing the problem? The top orifices (low speed) in carbs 2 & 3 is .303. The top carb (#1) is .330. All 3 carbs have the same high speed orifice (at the lower or bowl section) - 54D, and according to the manual, it is the correct size.
Can anyone out there tell me: a. Is this a possible cause for my acceleration problems?
b. Does anyone know what the right size orifice would be for this carb? I talked the the local Johnson parts dealer and could not get an answer. Should I just go ahead and change this one orifice to see what happens?
I've checked the electrics with an ohms meter and an automotive engine analyzer but of course, its not the same thing as having the right equipment. In any event, it appears that my coils, power pack, and timer base/coils are in working order.
Ah! One other symptom: no matter what I do, the plugs always seem to be wet (not with water but gas/oil). Naw, I'm careful about measuring the right 50:1 mix; that aint it. !@#$%^&*()_+ what gives? HELP!
You guys have come through for me in the past and I know you won't fail me now. Any thoughts, ideas & suggestions will be greatly appreciated
