Always take timing when reading, or stop movement of the engine for timing set up, in the direction of rotation. The amount of gear backlash in any system of gears varies between installations because there is clearance between the gear teeth. Typical built-in timing mark on propeller reduction gear. 1 cylinder must be on the compression stroke. When installing magnetos, the timing marks must be lined up and the No. 1 cylinder is used to time or check the timing of the magnetos. ![]() Sighting at an angle results in an error in positioning the crankshaft. In using built-in timing marks to position the crankshaft, be sure to sight straight across the stationary pointer or mark on the nose section, the propeller shaft, crankshaft flange, or bell gear. In every case, the engine manufacturer’s instructions give the location of builtin timing reference marks. On other engines, the timing marks are on a crankshaft flange and can be viewed by removing a plug from the crankcase. To time these engines, the plug provided on the exterior of the reduction gear housing must be removed to view the timing marks. Some engines have degree markings on the propeller reduction drive gear. Other flange marks indicate degrees before top center. The top center (TC) mark stamped on the edge aligns with the crankcase split line below the crankshaft when the No. On an engine that has no starter gear hub, the timing mark is normally on the propeller flange edge. ![]() When the starter gear hub is installed correctly, the timing marks are marked on it that line up with the mark on the starter. The timing reference marks vary by manufacturer. Most reciprocating engines have timing reference marks built into the engine.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |