Reply To: Problems with my 75’ 25 Johnson

[Don]

Well, back to your original issue, which was a “surging issue” at WOT. Do you think the surging was fuel related, or was it misfiring/ignition issue? You had the mag plate off/apart, this engine has the much loved “low tension ignition” system. Are you sure you connected the primary leads to the proper coils and didn’t reverse them? You didn’t disassemble the fuel pump did you? You mention the fuel bowl is definitely getting filled, but is the high speed jet clean/properly installed? Did you remove it when you had the carb apart? On the other hand, is the carb flooding over?
You mention the engine won’t start, does it make any attempt to fire/start? You might try removing the fuel line, draining the carb, then squirting some fuel oil mix in each cylinder…. Then crank it and see if it attempts to fire.
It always pays to go back to basics, are you sure the fuel/oil mix is fresh and there is no water in it? Did you reconnect the vertical throttle rod to the mag plate arm? Is the mag plate moving freely and advancing properly? Is the carb butterfly linkage properly connected, sync set up properly? Are you sure the choke is working properly? Does the choke plate close fully when the knob is pulled out? The choke knob won’t stay out if that plastic grommet in the air silencer is missing/worn out…