I have finally thrown in the towel and purchased a new O/B 2012 Suzuki 70hp four stroke. My previous engine was a 2001 DF70 Suzuki. I am curious if I am able to use my old prop? I do not know the manufacture, however stamped on the prop is 13-1/4X18 and it is stainless steal. Also I have tried to slide on the prop, but it will not fit. The shaft on my new motor is larger so I figure I can get a new hub with a larger dia to fit over the new propeller shaft? The back back spacer is also different in that it has a tab on the outside. Thank you for any help.
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Usually, the four strokes put out more torque than the 2 strokes so they are geared differently. The shaft output rotation is probably less than on the 2 stroke so you need more pitch or a larger dia or both to match the engine power curves. The old prop will function but crappy performance. A good used or new prop on ebay is 100-200 bucks...you just blew 4000 on a motor , why skimp on a mismatched prop
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