Having trouble getting this motor (hssk50) to run. Had it running in Oct. but when we got our first snowfall it would not run. Has spark and will fire but will only run for a few seconds and very rough. I found that the primer hose was unhooked from the carb., replaced but no difference. Do I need a carb kit or will a good cleaning of the carb. help? Also as long as I am here I could use a manual for this motor to ensure the proper set up of the carb. Thank you.