We need to know what kind of engine it has, and if possible a picture of the engine. It seems fairly likely it is a Briggs and Stratton, but those have had dipsticks on most models since about 1981, so we need clarification. Their drain plug is also very easy to find on horizontal crankshaft models, and I seem to recall the Imperial is a reel (cylinder)-type mower, which has a horizontal crankshaft engine. Can you give us details please? If it is a Briggs and Stratton engine it has a long series of numbers stamped into the air cowl, near the cylinder head - please give us the whole series.
