Often the glazing is not really wear on the liner, but the hone grooves get packed with carbon. Oil control gets sloppy. Often a good hard run will burn the carbon out of the grooves and all is well. An hour or so at 75% should do it.
A 2liter engine at 1800 and making 40hp is not going to have a glazing problem. Even at 20hp at 1800 it will be fine.
It can be a real problem on gennies that run all night and all day at almost zero load at 1800, day after day.
But the issue still is rare. Running a Yanmar JH at hull speed is NOT going to have this problem.
Still good to run it hard once a day. But no need to go to full power, 75% should be fine. Even 50% should clean it up.
CD, don't worry about this.
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