When you get the engine back into your possession, remove flywheel cover and see if you can move flywheel by hand. If you can move flywheel by hand, smile and say a good word. If flywheel wont turn, do not force it. Report back here. Remove brass plugs from each side of float bowls on carbs and see what comes out. If green or brown goo comes out, say a bad word but first look around to make sure that significant other (or young ones) is not standing within earshot. You will now be removing carbs and cleaning them, the fuel lines, the fuel pump, and take a good look in the tank too. Remember too that thrown tools will scuff up fiberglass, so be careful which way they are hurtled through the air. If nothing or something that smells like gas dribbles out, slowly smile and rub palms together. If motor turned in previous step then remove spark plugs and spray fogging type oil or 3in1 or wd 40 into cylinders. Spray some through the carbs and spin her over by hand with the plugs out. It should spin free. If it does, clench teeth together and say 'Heh heh heh. If it does not spin free, report back here. Install new impellor properly and put lower unit back into place, first checking that it will go into neutral, forward, and reverse (reverse is somewhat over rated until you get really close to the beach or dock). Engine should not be run above a couple of thousand rpm without air box/attenuator in place unless carbs have been jetted to run without box in place. Remove battery from significant others automobile and not your truck. Install it (the battery) in or around the boat and spray some premix into the carbs. Go for start after first checking for spark and then making sure that you can make the spark stop (actually turn motor back off, quickly, if necessary). Don't forget the water hose. If there is no spark, use serious bad word or hopefully a whole phrase, with the volume level turned up, first checking on whereabouts of children or significant other. Report back here. Otherwise, fresh fuel in the tank is a must have. If she lights right up, do the Walter Huston Dance, right there in the driveway, and by all means show the significant other the results of your mechanical prowess. Pass go, and hear choir sing in background. If sky above is blue and trailer tires have air in them, consider sea trails, but first check output of charging system. If charging system is not working, postpone sea trials and report back here. If she is charging, walk to front of vessel and see if license tabs are current. This will help keep Johnny Law from becoming acquainted with you. If oil, water, and fuel are all staying where they're supposed to be, grab up a personal floatation device, a couple of oars (don't ask, just do it), some rope for mooring (or towing, again, don't ask), and let the fun begin. Now, if for any reason, you suspect the vessels integrity may be lacking in the stern area, buy a rope strong and long enough to recover motor from bottom of body of water that you are going to perform sea trials in. A float tied to opposite end of rope from motor will help find motor should something bad happen. Stay near to dock for first trips to keep possible rowing times to a minimum. If things go really good, remember 1/3 out, 1/3 back, and 1/3 in reserve for the fuel. Enjoy. If bad things happen, report back. I do not recommend taking the significant other along until the vessel is "Turn Key" and without significant drama. Taking a good friend along should be second nature especially if 'hard times' are encountered. If good friend has a functioning boat, it might come in handy. A poorly functioning friend or friends boat may complicate matters though so use discretion.