:confused3:I HAVE A CRAFTSMAN 917.255720 10 HP TECUMSEH ENGINE, THE ORIGINAL ENGINE WAS 143.356012, THIS ENGINE HAS BEEN REPLACED WITH 143.406022. THE CARB. IS A 632525 AND I HAVE CLEANED IT 4 TIMES EXCEPT BEHIND THE WELCH PLUGS. MY BIGGEST PROBLEM I AM HAVING IS (I MUST HAVE THE ONLY 1985...