Can anybody tell me what year my motor was manufactured, and what are the correct spark plugs to use in it? Model number is T750H9A and serial number is 1195. The motor runs very well once she is warm, but can be difficult to start from cold. There is very little information on these motors here in Zimbabwe,but I am determined to keep her as original as possible.The motor is mounted on a light 14' 6" fibreglass fishing boat, and can still keep up with a lot of my fishing buddies with their newer outfits. Most of our fishing is done on the Zambesi river or lake Kariba, so a reliable runner is very important. Thanks in advance to anyone who can assist.