fallingfowl
New member
"I own a 1978 23" glasply
"I own a 1978 23" glasply cuddy with a mercruiser 233 (Ford 351), 2-barrel Rochester Carb and Alpha 1 drive. It has Pertronics "Ignitor" aftermarket Electronic ignition. All fuel is new 87 octane fuel, after having run out the 2-year old fuel that was in the tanks when I bought it last year.
I have replaced the electric in-line fuel pump, checked all fuel lines for obstructions, rebuilt the carb, during which I found the power piston (not the accelerator pump) in the carb was not moving (corrosion?). I cleaned it up and got it moving well. After the rebuild, the symptoms below went away and My son and I had a fine one hour trip on the freshwater lake near here, starting stopping, run WOT, etc.
Now the problems are back.
Here are the symptoms I have:
Runs fine in the driveway, at the dock, under no load. WOT is 4300rpm in neutral under these conditions.
Runs ok when under load, but WOT is only 3000RPM. After it warms up, it begins to run rough, missing, surging, and generally acting sluggish and spotty. It will die at idle. Once it sits a bit, I can restart it and we repeat the problems as it warms up. By the way, this has all been happening in the saltwater (probably not a contributing factor, but it is a variable I have considered)
I have narrowed things down to :
1: Still got a fuel supply problem.
2: The ignition system is whack.
3: The boat is a trailer queen.
Thanks in advance for your help."
"I own a 1978 23" glasply cuddy with a mercruiser 233 (Ford 351), 2-barrel Rochester Carb and Alpha 1 drive. It has Pertronics "Ignitor" aftermarket Electronic ignition. All fuel is new 87 octane fuel, after having run out the 2-year old fuel that was in the tanks when I bought it last year.
I have replaced the electric in-line fuel pump, checked all fuel lines for obstructions, rebuilt the carb, during which I found the power piston (not the accelerator pump) in the carb was not moving (corrosion?). I cleaned it up and got it moving well. After the rebuild, the symptoms below went away and My son and I had a fine one hour trip on the freshwater lake near here, starting stopping, run WOT, etc.
Now the problems are back.
Here are the symptoms I have:
Runs fine in the driveway, at the dock, under no load. WOT is 4300rpm in neutral under these conditions.
Runs ok when under load, but WOT is only 3000RPM. After it warms up, it begins to run rough, missing, surging, and generally acting sluggish and spotty. It will die at idle. Once it sits a bit, I can restart it and we repeat the problems as it warms up. By the way, this has all been happening in the saltwater (probably not a contributing factor, but it is a variable I have considered)
I have narrowed things down to :
1: Still got a fuel supply problem.
2: The ignition system is whack.
3: The boat is a trailer queen.
Thanks in advance for your help."