My Tecumseh 16hp had no spark so decided to upgrade. I purchased a Predator 670 from Harbor Freight. I was able to pull out the old Tecumseh and the clutch fit right on the new Predator shaft. The engine bolted right in and the clutch seems to line up well with the t20 pulley. I am having trouble figuering out the throttle linkage and wireing. Anyone out there that has done one with any tips?