Bob Perkinson wrote:

Attached is a picture of the Center housing of an 87 13B that I have,
as you can see the combustion o-ring housing is broken off.  Has
anyone successfully repaired the outer wall of the combustion O-ring
housing?  Can this even be repaired?

Bob Perkinson
RV9A

Common problem for that year engine. Yes somebody has repaired them by
brazing as I recall. I personally would not consider the repair safe for
aircraft use however. These housing are interchangeably from year to
year somewhat. I would get another end housing from an 89 or latter. It
think Mazda had a quality control problem or the design did not allow
enough excess meat for minor core shifts. They fixed this problem in
later years by modifying the casting patterns I think.

Paul Lamar

Here is how I fixed one by making a steel insert. I have a couple
hundred hours on it. Use at your own risk.

Chuck Dunlap

 
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