Posted by Paul in MN on November 22, 2011 at 08:07:17 from (174.20.133.143):
In Reply to: Tecumseh motor posted by Aaron in IL on November 21, 2011 at 20:14:26:
Before becoming committed to this rebuild, be aware that Techumseh went out of business a year or so ago. Some dealers still have parts on the shelf, but some of these parts have gone astronomical in price. There were 3 grades of Tech engines. The lowest has the aluminum block with nitrited bore (common of Sears stuff).. don't bother putting $$ into this piece of junk. Then there was the aluminum block with steel cylinder liner and pressed valve seats. The steel cylinder liner could be successfully honed and new rings fitted, but usually a new piston and conn rod were needed also. Finally the really tough engine was full cast iron (used in the 70's on Troy built tillers). These could be bored and honed and live on for more decades. In all these engines (and most other brands as well), there is no replacable bearing shell on the conn rod bearing. That wear had to be taken care of by replacing the conn rod.
Briggs has made an engine for replacement on these Troy built tillers. But with any replacement engine you need to be aware that the extreme angle the engine is put while doing the deep tilling can starve the crankshaft for oil. Troy had a series of Techumseh engines packed with the standard oil dip stick, and most of them seized up (mine included). Their specs called for a different dipstick calling for more oil in the crankcase. Then the engine could survive.
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