Yes, for sure if you don't have to run a mile up and down the lake at high speed and if you aren't using the boat to pull tubers or other tow behinds then 10 or 15hp fourstroke would be fine.

There was a fantastic Honda four stroke with models covering several years in the 1980s with 8hp and 10hp models. My father in law has the 10hp (model BF100) You can youtube and see lots of videos of these BF100 motors. They are very simple and very reliable. By us one comes through for sale every now and then and usually sell for about $600-$800. They would be very adequate for cruising to the fishing spot in a smaller lake.

The only thing I have done is routine maintenance to the water pump, check the lower gear oil, and change the engine oil just like any other small 4 stroke lawn mower engine. No oil filter and a tiny gas filter to check on once in a while. I swapped the prop to one that gave a little more power which worked well for a heavier boat with a few guys in it.

But newer 10hp or 15 hp 4 strokes would give all you need to get to your fishing spot. Newer models by us sell used for about $1200-$1500. It is a little hard to know condition of a used outboard as they don't have a 'hour meter' to tell you how they were used and how they were maintained. Also some are 'short shaft' and some are 'long shaft' which makes a difference in how it mounts to your boat.

It may not be bad to have a local shop that fixes and resells used motors to go through it before you buy or buy one they went through already.