i have a Sears lawnmower 917.376691 with the Honda engine GCV160. A neighbor was going to toss it. He said that the only way it would start was with starter fluid. Now even that wasn't working. I checked and the spark plug was badly fouled (all that starter fluid maybe?) Also looks like it might be over filled with oil (hard to read the plastic dip stick). I took the carb off to clean it and saw that end of the choke rod was just laying there??!! One end was in the black tab on the carb but there is no tab where the other end needs to go. Not sure how that could be missing?? Any thoughts? Thanks in advance.