Dude -- the 6 HP motor is the main propulsion for the boat. The "electric" trolling motor is to poke along slowly while fishing. The electric is noiseless compared to the gas engine. I suggest you really do some boat research if you actually plan to work up to reasonable bass boat. If you can't figure out this current deal you will get royally hosed on a bigger more complex boat. You've been advised to 1) check with the state to see if the trailer, motor, and boat need titles/registration. Failure to have the documents means you have no way of knowing if the rig is stolen and are in for a lot of frustration and leg work to get this paperwork sorted out. 2) You need to "see and hear" the motor run. Just needs a tune up is seller-speak for it is toast. If the owner refuses to run the motor (using a garden hose and a flushing device or in a trash can full of water) you drop the price in half and hope for the best. Be aware that the three pronged stump & rock device on the end of the motor is not a factory device and was added by the owner. That should tell you this boat has some hard used and the lower unit (the propeller end) may have suffered some damage. The seller probably realizes he can sell your kayak for $250 (or possibly more) but the boat and both motors may have issues so he can't sell it for what he's asking. That leaves him in the drivers seat and you on the losing end of a bad deal. Unless you have some mechanical and engine troubleshooting skills and can work on engine powered stuff yourself, you really have two choices: a) obtain the items really cheap so you have enough margin to have the work done, or b) know what you are getting so you don't get burned. Never, I repeat never, take a sellers word that the engine runs good or that the boat doesn't leak, or the trailer doesn't have any problems. You need verify this stuff yourself. If you don't have a clue, take someone with you that knows what to look for.