New member here, happy owner of 3 (!!!) Bolens Suburban tractors. I realize they are not as prized as the tube frame models but they work great and I use them constantly! Additionally, I purchased the 16HP model and rescued the other two from the dump and side of the road!
I have an ST110 that has an 11HP Briggs engine in it. Pictures attached. Engine model is 253707-0144, carb PN 394038 or 490149, neither of which is currently available as a replacement.
The ST110 runs good sometimes, and other times it needs choking, or adjustments to the screws on the bottom of the float bowl or some other adjustment screw on the top of the carb. I took it apart and cleaned it and rebuilt it as best I could and made new gaskets. It runs better than it did when I got it but not great. It runs better under load. Sometimes it runs better with choke, and other times starts sputtering and the float bowl adjustment screw needs tweeking. It is not consistent.
Is there a replacement carb I can use despite not being a factory fit?
Is there a way to adjust this thing so that I do not have to keep messing with it?
Pictures of the fleet attached (Left-to-Right):
1985 ST110 11HP Briggs with manual transmission and mower deck (current problem child)
1989 ST100 10HP Briggs with manual transmission and mower deck
1984 ST160 16HP Briggs 2 cylinder with hydrostatic drive, mower deck and single stage snowblower
Picture of offending engine and carb....