Older Homelite XL2 (mag case) is sort of a family heirloom and would like to get it going. It ran in the past, but the spark plug wire was bad so I put on a new electronic one and ditched the points and condenser. Couldn't make it fire no matter what I did. I had an old XL and put that carb on, nothing. New plug, new fuel lines, hot spark on the plug, nothing. I just swapped the reed valve using the old one and got it to fire. (Also 125# compression) It will fire and idle for about 3-4 seconds. I see s tiny gap on the reed valve--it's stainless and is riveted to the block so I can't turn it over. Should it be completely closed? Changing out the reed has yielded the most promising result, so that tells me that the pulse was not drawing fuel into the cylinder. I will go back with the carb that came on it and see if it runs--it has been cleaned within an inch of its life. Any insights would be greatly appreciated.