is this the same engine i answered you on yesterday on a different post? the pics aren't working currently to confirm.
since you have bought it without it running you have a total crab shoot here unfortunately. not running in 2 years is not uncommon but depending on how it was stored will depend on how likley it is to run well.
at the very minimum, check the mounts (if shot i would seriously consider spending any money on it at this point), take plugs out and spin the flywheel by hand, assuming it isn't seized then some 2 stroke down the bores and spin it over a few times by hand.
check all electrical connectors, PTT if it has it to make sure no rust or any obvious signs of problems before you hook a battery up.
hook the battery up and see if you can crank it over (killcord out!!) to oil everything up a little. PTT check too at this point worth doing.
compression tester is really handy here, depending on the numbers will depend on how or if you proceed down the list. if you don't have one then skip to next.
clean/replace the plugs accordingly.
get some fresh fuel in a small tank, mix some oil in fuel at desired ratio, if it is an oil injection motor with a seperate tank then i would still add some oil to the fuel until you confirm the oil injection pump is working. worst case it will smoke a little but it is better than the other scenario with no oil if the pump (if it has one) doesn't work.
drain the carb fuel float bowl.
you may see a lot of fuel out the carb when primmed due to seal or stuck float given time it has been sitting. a light tap normally fixes it or strip/clean accordingly.
if you can put it in and out of gear whilst started, take prop off if in a barrel.
if you have no water coming out of engine then do not run it long!
if happy with all of the above then i would change the gearbox oil, impeller, new plugs, drain and replace the oil injection tank oil, change fuel filters and rebuild the carbs.
if all the above checks out and no adverse bearing rumbles/gearbox issues then you are golden.
any reliable engine is a good un on a boat, many happy nautical miles