Just put some new spark plugs in it and run it. If you have been running that much Seafoam and Stabil in it your carbs should be clean. I think I remember you recently changing the water pump impellor so it does not need that and you can change the oil in the foot yourself, very easy....two plugs.....Remove them and drain the oil....then put the oil in the bottom hole until it comes out the top hole, put bottom plug back in then put top plug back in. If you get a quart bottle of outboard gear oil and one of those pumps its really easy....if not it will take three of the plastic tubes of gear oil....just cut the tips off of all three and have them ready to go....stick tube in bottom hole and roll it up...then stick second tube in and do the same, then the third tube. No need to spend several hundred bucks if you are not having carb problems. You can get the outboard gear oil and that pump to put it in with at WalMart