Re: Why do I get a spun prop when I go full throttle?
If you actually spun that prop, an if it is a Suzuki, you will not be able to get above about 1,500 RPM or so before it slips completely. What I am saying is that if you actually have a spun prop you probably can't get the boat to go faster than about 7~10 knots.<br /><br />On the other hand you may very well have ventilation problems. This is what many folks call cavitation, although cavitation is something that almost never happens to outboards or even to I/O units, or just about any other small diameter prop for that matter.<br /><br />Your fist step is simple, figure out if its actually spun. That is very easy to do if you have a wife or daughter. Get some fingernail polish and paint yourself a little line across the back plate of the hub and onto the prop, where the hole is that the hub is pressed into. Then go run the boat for just a few minutes, until it does whatever it is that it is doing. Come back and take a look at your line and see if the hub has turned relative to the metal part of the prop. My guess is that it hasn't. Then have someone else drive the boat and get it up on plane. Look back over the back of the boat and see where the cavitaiton plate is relative to the water. It should be right at water level or maybe, just maybe, ever so slightly up out of the water. My guess is that your's is much higher than that.<br /><br />Thom
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