F12153 is the part# If I have the right motor.
We need more info as to the model or year and pics will help.
Just saying a 80's 15 there is about 100 different models made in the early 80's
Some use points some don't.
Look on e-bay Just put in F12153 and the points come up. $25
The first 2 #s in the serial # reverse them and that's supposed to be the year. 83