don ford wrote: Subject: UL: 618 Cl;ean Up
> I get the impression that your remarks are the middle of a story. Is this
> your own engine, or is it one you are working on for someone else? It sounds
> like the engine suffered a catastrophic failure. Please give us a little
> backround. Thanks very much.
Sorry, I mentioned this engine several days ago when the subject of FnAA
oversite of ultralight operations came up.
It is my contention that the FnAA and their designees, the DARs, have
little or no knowledge of the two stroke engine, and the construction
methods and materials used in ultralights.
The Genisis that this engine was installed on was inspected since it was
N numbered and the crash was blamed on fuel starvation.
I bought the engine from the owner.
The FnAA inspected the fuel pump only and decided it was fuel
After the complete teardown, I found a dozen things that could
comtribute or create an engine stoppage.
While the rings were very close to sticking, they were not, and the
pistons had no evidence of a seizure.
The engine was covered with a sooty black 'gook' and the source was
prolly the front seal which had been damaged by a starter bendix spring
which had broken and stuick to anything magnetic in the stator area.
Small parts of this spring were stuck to the trigger coils, and they
possibly damaged the front seal lip. The lip was gone and the retention
spring was around the crank shaft itself.
I can not say what caused the stoppage, but the 24 inch pulse line is a
potential source. The oily coils and the oily coil insulator boots, the
plug ends, the trigger coils, just not sure.
Both rear and both front bearings on the crank were shot, with the
separators completely gone on the front most bearing.
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