I forwarded the question about the little Lycoming to KR-2S builder 
Richard Oliver due to his substantial experience with this engine in a 
T-cart. Below find his thoughts:

TS

Jonnie Bradley wrote:

> Todd, can you please forward this to those people inquiring about it?
>
> In reference to the Lycoming 0-145B-2 engine, I have spent about 200 
> hours behind the prop of this engine in a 1940 Taylorcraft.  The 
> engine block and cylinder sleeves are cast together and made of cast 
> iron.  Although my engine was zero time and had been built by El Reno 
> Aviation in Oklahoma (probably the most knowledgable people on this 
> engine and recommended by Lycoming directly) the engine itself is 
> unreliable and there were many reasons manufacturing of it was 
> discontinued in 1948.  The engine was notorious for having problems 
> with the valve seats in the aluminum heads.  I personally had three 
> exhaust valve seats come loose in flight which jams the exhaust valve 
> wide open, therefore running on three cylinders.  It was also fitted 
> with a small throat, Ma2 Marvel carburetor.  Parts are almost 
> impossible to find for this carburetor.  It was also fitted with 
> Bendix Scintilla (sp?) magnetos, parts also impossible to find.  As 
> far as the starter and generator accessory plate - those parts are 
> rare and difficult to rebuild.  In closing, I had a beautiful, 
> award-winning, pre-war Taylorcraft with it's original O-145 B2.  The 
> engine was a maintenance nightmare.  These engines should be left on 
> the antiques and in the museums, where they belong.
>
> Respectfully, Richard Oliver
>
> Todd Servaes wrote:
>
>> Richard and Bill,
>>
>> I thought that you each for your own reasons might find the message 
>> below from the KRNet entertaining.
>>
>> TS
>>


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