"First of all, put some 2-stro
"First of all, put some 2-stroke oil down the plug holes and check that it turns over when you pull the cord. Then, check it has compression.
If it does then take the carbs apart and clean them out, run carby cleaner through all the jets and galleries to makes sure they are clean and if not then clean them.
Then check the gearbox oil and the state of the water pump impellor (it may well be rotten after all that time so replace it).
Check to see if it has a spark and if it does (or once you have fixed it) then put some fresh gas in, hook it up to a water barrel or a transom and try to start it.
Good luck!"