I have aquired a tired 8/30 as a bit of a project (possibly 50 bucks wasted) which starts, although when it started my ankles were sprayed with oil, but forward and reverse will not engage. The rod to energise this function enters what I take to be the gearbox but appears to be frozen ie it does not move in or out very much. Is there anybody watching who can help me out with the best way to start this project? I have expertise and equipment but just need a nudge. There is no data plate under the seat (or elsewhere on the frame) that I can see but the B&S engine has the following: Model 190707, Type 2159 01, Code 84100309. I see a lot of expertise on this forum and look forward to members' input.