I'm relatively new to boating and I have available to me a 1994 Mariner 30 HP with less than 500 hours on it.. I want to put it on my 29' pontoon. It's little smaller than I wanted, but I cant afford much more.. It should push my pontoon from here to there and back, just not very quickly.... The seller wants $1000.00. Is this a good price? Is this a good motor? He told me Yamaha makes the engine coupled with a mercury shaft... Thanks for any advice....