Re: what kind of headwind should a sailboat be able to motor through?
The sea state was choppy, but only a mile from land with offshore winds, so not bad. No tide to speak of.
Hull and prop were clean when she went in the water 7 weeks ago.
Service history is unknown. Last two previous owners cared for the boat well - for what that's worth.
I have owned the boat two months. Previous she was on the hard 2-3 years. Its a 1979 15 HP yanmar. I changed oil, oil filter, fuel filters, new exhaust elbow (long story). Some fuel was in The tank. I had thought I drained it all, but have since run 10 gallons through.
Tank is old, no doubt. And may be an issue.
1979 Glastron Spirit 28, Hull #28.
Twenty years from now you will be more disappointed by the things you didn't do than by the ones you did. So throw off your bowlines. Sail away from safe harbor. Catch the trade winds in your sails. Explore, Dream, Discover.