D379, D398, D399 Industrial And Marine Engines;
D353 Marine Engines
Description of Change: A new exhaust valve and new valve guide are used in the above models. The new valve is stellite faced for hardness and high temperature operation. The core of the new valve is made of a material that is not as brittle as the former valve. The new valve does not have a chromium plated stem. For this reason, our recommendation is to use standard valve guides with the new valves.
Adaptable As: The new valve and guide, used together, are a direct replacement for the former parts.