After 2 months of searching I finally discovered what engine
I have. Now hopefully I will be able to learn something about it without blowing it up. The installation
is somewhat of a hybrid. I think the original installation
(Ferrymann sp?) included a heat exchanger
for a hot water
system. Therefore it took over a month before I discovered a second impeller that was causing the overheat. The main problem is, there is no manual for the engine
and everything is exploratory surgery. I am sure it needs anodes replaced but where are they? That is just one of many items. Previous owner(s) ran 15w 40 when streight 40, 30 or 20 is specified for the 284. If anyone has any experience with this engine please, please, please get in touch with me. Thanks in advance.