Onan Generator issue


Yanmar engine working...more to come about the solution later but now dealing with another issue:  I didn't run the Onan genset for a month (sitting at a marina with power).  Just tried it, turns over and runs--then shuts down after about 30 seconds.  Water flowing happily yet yellow light blinking pattern is 7 indicating that is it is a raw water or cooling problem.  Ideas? Thanks!

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