I purchased a new to me late 80's Mastercraft 10/26. When i bought it it started right up with no issue.. i changed oil spark plug and new gas.. ran great after that no issues.. the next morning we had lots of snow like 14 inches. so i fired that baby up and snowblowed 6 driveways including mine with no issue it ran like a brand new machine. i parked it in my garage for 5 hours while another 6 inches fell so i went out to fire it up and could not get it to run. Any ideas? the plug gets wet and i have 135 psi compression. so what could it be. ran like new 5 hours earlier... thanks for any ideas.