Greetings all!
I have a new situation where my A4 will start fine and run all day at relatively low power (enough to push our Yankee 30 at 4 knots in a calm), but when I try to increase the throttle the motor begins to stumble. I can recover by gently decreasing the throttle, but if I raise it quickly she'll just die. At that transition between smooth running and stumbling, I can apply choke and that helps considerably. I hear the rpms come up and there is more power. It doesn't run perfectly, but much better.
Do these symptoms point to the high speed jet being obstructed? What else might I consider? I have a Racor, then a 7-10 micron filter before the mechanical pump. No filter between the pump and carb.
I have not taken anything apart yet, nor inspected the sediment bowl. Just now preparing to work on it this week.
I had the carb apart last year for a good cleaning, and everything was working great. I did leave a few gallons of ethanol gas in the tank over the winter.... Now ethanol-free gas is available here again.
I look forward to hearing any thoughts this fine group has to offer! Thank you. -Rob
I have a new situation where my A4 will start fine and run all day at relatively low power (enough to push our Yankee 30 at 4 knots in a calm), but when I try to increase the throttle the motor begins to stumble. I can recover by gently decreasing the throttle, but if I raise it quickly she'll just die. At that transition between smooth running and stumbling, I can apply choke and that helps considerably. I hear the rpms come up and there is more power. It doesn't run perfectly, but much better.
Do these symptoms point to the high speed jet being obstructed? What else might I consider? I have a Racor, then a 7-10 micron filter before the mechanical pump. No filter between the pump and carb.
I have not taken anything apart yet, nor inspected the sediment bowl. Just now preparing to work on it this week.
I had the carb apart last year for a good cleaning, and everything was working great. I did leave a few gallons of ethanol gas in the tank over the winter.... Now ethanol-free gas is available here again.
I look forward to hearing any thoughts this fine group has to offer! Thank you. -Rob
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