CAUTION 2+2 IS EXTREMELY FLAMABLE...i spayed a little on the driveway and PUUFF!! IT WENT UP FASTR THAN I THOUGHT IT WOULD. yea its flammable but like i said i reset the timing with the light and vac gauge until i got the highest reading reset the mixture 2 half out fired up the motor let it warm checked idle 900 grabbed hold of choke started to close motor went up a little aint that what a choke does? closed it more it started to die opened it qwik to keep running when my motors idling and you punch it the tach dont seem to come down as qwik as i thought it use to i always thought thats how you know you have a vac leak when its in gear and you do it it drops real fast like i thought it use to am i right?