3 hp Tecumseh

0352 said:
Yeah I'll probably just rebuild it. I have been looking online for awhile and I can't seem to find a complete rebuild kit for a 3-1/2 hp Tecumseh. The only thing I found was a set of new rings with a new piston. I figure if I'm gonna do the rebuild I might as well do it right and replace the gaskets and everything else that comes with a complete kit.
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There is much more to it then installing a new gaskets, seals, piston and rings to completely rebuild a engine.
 
I'm not sure where the model number is on the engine. Ok, so here is something very unusual and weird. The engine started to stumble and backfire and wouldn't idle. So I figured there was some foreign debris in the carburetor, so I took it apart cleaned it and put it back on and that fixed the backfire issue. But now it doesn't smoke at all. Full throttle, idle and in between. Now don't get me wrong I'm thankful it's fixed I just want to know how. It's like someone replaced the rings without me knowing. I didn't add any additive to the crankcase. Any ideas on how it could have repaired itself. I have never seen this in my 25 years as a mechanic.
 
I'm just wondering if maybe the oil rings were stuck somehow and the backfire caused them to break loose and work properly.
 
I still have not seen anything like this. I mostly deal with large V-8's. Does this happen with the small single cylinder engine? I am not very familiar with these. I know most engines use the same concept (intake, compression, combustion and exhaust) just applied with different parts and designs. Just because I have access to a machine shop does not mean that I know everything. I have seen some strange things happen to engines, just not this.
 
Through the last 120 years or so, other then a few odd balls the basic 4 cycle piston engine hasn't changed. The same principals applies for a small single cylinder gas to a large diesel engine. Don't let the size put you down. I really do think someone should come up with something better and cheaper then the piston engine but it hasn't happen yet. When it dose happen the car manufactures better watch out or they will have on there hands what happen to Kodak.
 
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