i have a 13 h.p long-tail and i need to get my prop re-worked what size would work better a 8x4,8x5 or a 9x3? the guy at the local prop shop told me an 8x5 would be best but i dont know.

9 x3 is def too big, i ssay 8x5

yea thats what i was thinking also 9x3 is way to big, and i personally thought and 8x4 would be a tad bit to small so yea ima go with an 8x5 prop. thanks

I've got an 8X4 on an 11hp gdlt, just about right.

I will be puttin a 9x4 on my 13 when its time to re-prop.

This motor doesnt even bog down under a load in the mud with a 8x4 prop. I may even port and polish and do a slight carb re-build and head decking After duck season