A GLAZE BUSTER

It's not news to you that one of the principle factors in realizing maximum performance of any outboard motor or for that matter any internal combustion engine (2 or 4 stroke cycle) is the condition of its cylinder bores, pistons and piston rings.

The bore must be round and straight. The cylinder wall must be free of scores and/or deep scratches - smooth but not too smooth. A very minute degree of "roughness" is desired and required to retain the oil film for maximum compression seal between the cylinder and piston rings. In production, a cylinder block is rejected if inspection here at the factory reveals the bore "too smooth" as well as "too rough" - same holds true for the piston ring walls.

With "running" of the engine, both the cylinder and piston ring walls commence progressively to take on "polish" which is to be expected and as such accepted, but only to a degree of "dull luster" in appearance. Beyond the dull luster stage, a glazed or "glossy" like surface begins to appear to reduce the effectiveness of the piston rings as a compression seal - result is sagging power.

The solution here quite frequently is merely a matter of breaking thru the "glaze" and installing a new set of piston rings in the customary manner to restore power, an inexpensive procedure for the conditioning of "trade-ins" for resale.

Insert the instrument into the cylinder bore as shown - just a few turns with an electric drill up and down the bore will do to break the glaze.

Consider the Glaze Buster illustrated by Snap-On (Kenosha, Wisconsin) their #CF-60C and/or others on the market available thru your local automotive supply house. Use hone type if you prefer.