Had to replace the starter on my 83-420 AGAIN today. The original didn't sound very good when I bought it last fall, so I ordered an aftermarket. Put it on when the original quit in Nov. The new one broke the mounting (on the end of the starter) out at the top bolt hole. It was warrantied & replaced. Now that one broke in the same place. On this one, the top bolt that holds the starter together was loose, leading me to think that let it give enough to put the starter in a bind, causing the break. Has anybody else had problems with these?