I have a 16ft starcraft ss160. Found that the lightest 10hp is the old blue body honda. They are reliable and come in at 77lbs for a long shaft.. Next lightest is the merc/tohatsu around 84 for the newer models with with manual start/tilt. The pro-kicker, is much heavier as are the older...
I would look at the max hp rating on the plate and see what such a motor weighed when the boat was new.. Make sure your new motor does not weigh a bunch more.. Most the transom strain comes from towing IMHO,
Make it start, then disconnect the fuel line and run it til it dies. That will empty the float b bowl so you don't end up with a stuck needle and a no-start condition.
That would be the safe way to go. Power is measured at the prop on newer outboards so you probably gonna be good. My 14ft starcraft scooted along just fine with a 20hp.
I do the same mostly area 10..
You may want to find some data on the overall weight of the max rated hp from that era and use it as guide, and of course factor in your kicker weight. The strength of the transom is key and the boat takes a beating when being trailered. I have seen welds...
1 vote for a box. I shortened mine to the battery height. Then placed the battery into the box and installed as a unit. It was the only way I could do it. have an old starcraft ss160 and the battery sits in kind of hole next to the transom so in and out with the battery is tough It never gets...
I had a 95 starcraft sf14. Great boat. Stable, deep 'V'. Foam under the seats. Nothing on the floor. Very low maintenance. Fished puget sound salmon for years and once I got the feel could really handle some rough water. If I still had it I would be repowering with 15hp 4 stroke ...