Just purchased my 21V 5 weeks ago. On the lake yesterday with a check engine light. I had replaced one of the batteries earlier in the day but once on the lake, both the red light and check engine light came on. Reduced engine speed, restarted and warning signal disappeared for 5 minutes. Then back on. We are at 410 engine hours. Added 2 quarts of oil. Bringing the boat to the dealer tomorrow AM. Will post the problem when it is diagnosed