that got me to thinking about that 90% wear figure. Not sure exactly what the details are there.
What if the total wear was insignificant, but 90% really did happen on startup?
Now if they said 90% of the wear directly responsible for a rebuild or major repair was caused in starting, well, that would
sure be a lot more credible to me.
I just bought a new portable gen and when that thing fires up and goes directly to 3600rpm, boy does that make me cringe. At least on the tractors I can start at idle or just above.
Sometimes on cold days I'll turn a gasoline motor over a few times without putting on the choke, trying to move the oil a little. Not sure I'm accomplishing much. If that fresh oil hasn't dripped down onto those rings within a millisecond of that engine moving, on a microscopic scale, I don't think it will look pretty. Doesn't seem to be the rings that get wrecked, isn't it usually the dry rings scoring the cylinders?