typically the set up of sachs is that the clutch lever activates both the clutch and decomp. The engines don't turn over terribly easy. The inertia of rolling down the road is sometimes necessary. Check the flywheel and make sure the engine turns freely but the pedal start mechanism has very little mechanical advantage so on the stand they do create a lot of resistance. Sachs is a good solid engine, but as a sled guy you're probably quite familiar with the name.