Originally Posted By: Trav
Originally Posted By: SirTanon
A lawn mower engine is a far cry from any kind of modern automotive engine.
All internal combustion engines are the same (inc rotary and diesel), even a reciprocating air compressor is close, they all depend on sealing a space to generate compression and all generate friction.
If something works or not in one it will also work or not in the other.
Sure the level of sophistication, cycle and valve configuration have many variants but the basic principal is all the same.
Perhaps, but I don't recall ever running my mower for 90 minutes at a time at 2000+ RPM. My mower engine also isn't pulling a 2500+ pound car. In terms of combustion cycle, etc.. sure, it's the same principle, but the work that its expected to perform is drastically different.