Quick view Rotary Corp Aftermarket Fits Tecumseh 31386 Governor Spring Fits models most LAV25, LAV-30, LAV-35, LAV-40, LAV-50 (mechanical governors). 3/4" Coil, 1-3/16" Overall length.Fits models most LAV25, LAV-30, LAV-35, LAV-40, LAV-50 (mechanical governors). 3/4"... $3.00 $2.29 Add to Cart