While this has not happened on my Kohler, I would replace the spark plug (ensure its gapped to specs). In most cases of backfiring, its usually sometime to do with the ignition system, followed by fuel, followed by carburetion. Usually fuel-relate...
Just had this happen to me on Dancer 320. The AC cooling water (raw water) circulating pump is NOT self-priming. If the boat had been hauled-out and water drained as a result of pulling the strainer for cleaning, once splashed the pump can become ...
1) Keep fuel tanks > half full helps with stability (bottom weight)2) Trim tabs should be "tweeked", a little at a time on the low side. Do the tweeking when passenger load is evenly balanced.3) Of course, windage, speed and load shifting require r...
Not familiar with your particular year/model, but assuming you plane-up at those RPM's, any chance its something to do with the trim tabs through-hull?
