Thankyou to all who have given advice on my motor,it is now rebuilt although i have yet to turn the key but surprise surprise the weather is now against me now grrrrrrrr.<br />The prop on my engine at the moment has afew dings on it and so i am looking around for a new one and i have found one on EBAY.The markings on my prop are 13-1/2 P273/A273265 and i have just measured the diameter and it is just over 10inches.The one on ebay is a QUICKSILVER BLACK DIAMOND diameter 10-1/4,pitch 14, rotation RH with a flo-torq/rubber hub.<br />Will this fit onto my hub and if so would it improve the speed of my boat,my boat being a 15ft crysler striper which will be used mainly for fishing around the isle of wight(uk).