Had a mag 3 given to me, had been ran dry and then put in storage for 7 years. After a bit of work.... fresh gas, new plug, fuel inlet connector, ran carb cleaner thru it and adjusted carb, when temps were in mid to upper 40’s it would start on the 1st pull.... now that it’s colder it’s hard to start again. Do the carbs need adjusted differently in colder temps or could there still be more gunk in the carb that needs cleaned out?