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Model is - S200txrv
I have a new to me engine that I believe sat for a couple of years. I have the engine running but it seems to have a lean sneeze on slow acceleration. If I put it to WOT immediately it does not have this issue. It just occurs during slow acceleration.
I have changed the fuel pumps, spark plugs, fuel filters, primer bulb and rebuilt the carbs multiple times. When cleaning the carbs I put them in carb cleaner for a few hours then put in an ultrasonic cleaner. I also cleaned the jets. The timing looks good as do the plug wires. Compression is also good.
The issue still occurs even when I prime the bulb during acceleration. It idles fine and at WOT it runs good.
At this point I am not sure what the issue could be. The one area that may be a problem could the oil ratio? Since the oil system is so old, I have been premixing the gas at 50 to 1 in addition to the oiler (which also seems to be working.) Is it possible the heavy oil mix is causing a slight lean condition in the mid-range rpm on acceleration? Any other ideas on what could potentially cause the issue?
Thanks for the help!
I have a new to me engine that I believe sat for a couple of years. I have the engine running but it seems to have a lean sneeze on slow acceleration. If I put it to WOT immediately it does not have this issue. It just occurs during slow acceleration.
I have changed the fuel pumps, spark plugs, fuel filters, primer bulb and rebuilt the carbs multiple times. When cleaning the carbs I put them in carb cleaner for a few hours then put in an ultrasonic cleaner. I also cleaned the jets. The timing looks good as do the plug wires. Compression is also good.
The issue still occurs even when I prime the bulb during acceleration. It idles fine and at WOT it runs good.
At this point I am not sure what the issue could be. The one area that may be a problem could the oil ratio? Since the oil system is so old, I have been premixing the gas at 50 to 1 in addition to the oiler (which also seems to be working.) Is it possible the heavy oil mix is causing a slight lean condition in the mid-range rpm on acceleration? Any other ideas on what could potentially cause the issue?
Thanks for the help!
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