re: Any boat propeller experts on here? [update #3 Pg4]

I would think that if all else was set up correctly, this prop would eventually hook up after he gets going because the exhaust would be routed through the barrel, even if the barrel dia is slightly smaller than the gear case. No different than a vented prop, or in an extreme case, a ProET...which doesn't even have a barrel for exhaust to flow through.

Yes either get a cavitation ring or a different prop

Yep. He nailed it. Good job riot

Nah that's different. Vented props just have a small hole at the leading edge that doesn't flow exhaust once the prop spins up. OP's is bypassing a whole bunch of exhaust completely around the prop which is definitely going to cause cavitation.

Chopper props have straight leading edges and don't care about air. They're basically impossible to blow out.

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Terrible advice. Always best to try to settle amicably, first. Also, getting what he paid for, definitely; getting something extra should not be expected.

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Why? This guy is spending more money & time bc the dealer fricked up; the dealer needs make this guy very happy.

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lol. THEY hold the cards. They can turn a nice investment into a nightmare. Not to mention the fact that he could very likely need them down the road.

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This is why consumers (like me & YOU) are treated like shite today. As much money as this guy spent on a boat and HE has to try & figure out what's wrong and then have to take it back?????? IF the dealer doesn't immediately start kissing his arse the minute he walks in the door bot he & the manufacturer would get crucified.

Never go into any type of service place expecting to have your arse kissed or you will likely have a bad experience. Having been on both sides of it a whole lot, I can tell you the customer is most definitely not always right. They're quite often very very wrong and many times service groups have to loose money to give a customer something they absolutely do not owe him just because it isn't worth getting in the rocks and fighting it out with him.

Sometimes you have to get pissed and start chewing some arse, but 99.999% of the time leaving your emotions at the door and being calm and logical will get you muchhhhh further. Service writers can range anywhere from a barely literate dumbass on a power trip to an overly nice guy who will let you borrow his personal boat while he fixes yours and everywhere in between. Bring your people skills and leave the emotions outside. Generally they're going to treat you right.

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I didn't say that when you initially go into a place but when they frick up they deserve an arse chewing

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Go ahead. Get your jussis then


I hate this mindset.. yea, the dealership made a mistake, so what? Go in there, act like a normal human being first, and give them a chance to fix their error first before you go all NBR on them..

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I realize "life" happens) but if I spend $100, I want $100 worth of stuff; not $95 and I'm not expecting $105. If I buy a boat or a car the last thing I expect is to have to determine what's wrong with it the 1st time I use/drive it.

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I mean, I get what you're saying but there is a right way and a wrong way to handle people.. the guy you're raging on might not have had anything to do with the initial sale of the boat

If you were a woman you'd probably have the 'I need to speak to a manger' haircut

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Wonder is the prop was sized for the old 60hp motor.

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Prop diameter for 4 stroke command thrust 60 hp is 14 inches. My dad's old 2 stroke 3-cylinder 40 runs a 10.5 inch. Very possible they stuck the prop from the other motor onto your new 90.

You got the right idea. As the engine revs up there is more exhaust pressure which is forcing it around the sides instead of through the center of that prop. On top of that, the motor is moving forward in the water faster and the prop is spinning faster and literally sucking the exhaust out of that gap. This is taken from boats.com: "Ventilation is bad mostly because it can cause a radical reduction in thrust and also it can cause your engine to over-rev." Boats.com propeller cavitation and ventilation

This is what is should look like running in the water. Underwater cam

If you want to see some serious ventilation check this out. Around the 1 min mark you can see over half of the props out the water. Surface drives video

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If you were a woman you'd probably have the 'I need to speak to a manger' haircut

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i seriously LOL'd