They always advertise the lightest model. So that 143 lb is probably manual start, no oil injection, no tiller, short shaft. An electric start version is going to be a good 10 lbs more weight. I don't doubt the advertised weight because I used to pull them out of the crate & hang them on the transom by myself just using man power (no lift). Did the same with the 4 stroke 25hp Yamaha's but as I grow older, the less I want to do the manual labor thing. Look at the serial number on the motor. If it starts with something like 6H4, it's a Yamaha rebadged as a Mariner. A true Mercury/Mariner outboard will have a serial number something to the effect of 1G7733345 or whatever. Yamaha's were always a number, then a letter, then a number followed by a 5 or 6 digit number.
