The Aircraft Timing Indicator Model E25 is a unique device that locates the relative relationships between the crankshaft, magneto point openings, camshaft and valve timing.
Easily attached to the propeller spinner with mounting bands that are included with the unit, the E25 quickly and accurately (within ½ degree!) locates top dead center. The result: the all-aluminum Model E25 speeds up and improves the process of timing magnetos to the engine.
Made timing much easier, especially on the old continentals where the timing marks line up on the bottom of the case. Would suggest putting a rag over spinner, the sharp aluminum left small scratches the first time I used it.
Works like a champ! Simple easy to use. Simple, easy to follow instructions come with it.
Another great easy to use product for what has always been a issue. Would be great (5 stars) if it came with two extra lugs to allow it to be used on a three bladed prop. Was easy to convert now mine does two and three bladed props real easy
Per vendor: Approx 4-3/4"