I wish I could tell you exactly how the belts are replaced on a Kenmore 158.1941.I had the same Kenmore model,I never had to replace a belt on that model.I still have 3 boxes with Kenmore 158.1941 sewing machine accessories,cams,monogrammer and more. I loaned the machine to someone I thought was a very reliable person.Not !
[edit on Wikidata] The peak expiratory flow (PEF), also called peak expiratory flow rate (PEFR) is a person's maximum speed of expiration, as measured with a peak flow meter, a small, hand-held device used to monitor a person's ability to breathe out air.
Ejection fraction, or EF, is a measurement that describes how well your heart functions. It refers to the percentage of blood that leaves your heart with each contraction.This measurement helps determine how effectively your heart pumps with every heartbeat. If youâre healthy, your EF is between 55% and 70%.ots of things can cause low EF, such as a heart attack, coronary artery disease, cardiomyopathy, heart valve disease and systolic heart failure.