You guys gave me good advice on the vacuum lines. Thanks.......................
Next day, after I stopped after a short ride and tried to start. The screen said: BAD KEY
Eventually it started. A few hours later using the other key, when I tried to start it. BAD KEY.
Put it on the trailer Bad key before loading. It has started every one of the twenty times since. Still on trailer.

Battery reads below 12 volts.
So is it just the battery? Probably a new battery tomorrow. Don't know how old it is.