My son in law was given an old Yard Man two stroke snow blower. I went on a snowblower website where it was recommended that I use "Mechanic-In-A-Bottle" additive to first clean out the carb prior to actully starting the machine. I have never heard of this additive but it seems to have impressive reviews from small enine owners. Has anyone used this before? The snowblower has not been started in years.