Sailnet comes thru again.
Thank you guys for your input. As usual it is appreciated.
Funny you should mention barnacles. My buddy was complaining the other day about having to dive under and clean his prop. A couple of weeks ago I was in the water scraping down the sides because of the buildup, but I forgot to feel around to check the prop. I will check it out next time I'm there. I'm a little un-enthusiastic now since the Red-headed Jellies have returned. Wet suit time I guess.
I will also consider a professional tuneup. This is the second season I have owned her and though I have changed the oil and filters and rebuilt the water pump/replace the impellor, I am reluctant to try to adjust the valves etc. (This is where "if it ain't broke..." starts to break down. Is it broke, or ain't it broke when it is smoking. Can't I just keep her below 2800 rpm and be happy until the season is over?)
As for the water muffler, It was replaced right after launch this year. The condition of the elbow is unknown. (another "how broke is it really" question).
Gracias, mi amigos!