I have an old Honda, Harmony II HRT 216 GCV 160 Over Head Cam. For the first time in 13 years, i forgot to drain the gas and run it empty, however I dont think thats my problem. When i try to start it, it is very hard to pull. But if I pull the self propelled lever it pull pretty normally, but doesnt want to start, as the wheels are trying to turn. I tried putting it up on a block and was able to get it to start and run for a few seconds, and it sounded good. But my arm is still tired! So it seems like it is stuck in gear. Any advise on how to tackle the repair? Thanks, Jeff