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      Members Only Fluid Forum View   08/08/2017

      Fluid forum view allows members only to get right to the meat of this community; the topics. You can toggle between your preferred forum view just below to the left on the main forum entrance. You will see three icons. Try them out and see what you prefer.   Fluid view allows you, if you are a signed up member, to see the newest topic posts in either all forums (select none or all) or in just your favorite forums (select the ones you want to see when you come to Fishing Minnesota). It keeps and in real time with respect to Topic posts and lets YOU SELECT YOUR FAVORITE FORUMS. It can make things fun and easy. This is especially true for less experienced visitors raised on social media. If you, as a members want more specific topics, you can even select a single forum to view. Let us take a look at fluid view in action. We will then break it down and explain how it works in more detail.   The video shows the topic list and the forum filter box. As you can see, it is easy to change the topic list by changing the selected forums. This view replaces the traditional list of categories and forums.   Of course, members only can change the view to better suit your way of browsing.   You will notice a “grid” option. We have moved the grid forum theme setting into the main forum settings. This makes it an option for members only to choose. This screenshot also shows the removal of the forum breadcrumb in fluid view mode. Fluid view remembers your last forum selection so you don’t lose your place when you go back to the listing. The benefit of this feature is easy to see. It removes a potential barrier of entry for members only. It puts the spotlight on topics themselves, and not the hierarchical forum structure. You as a member will enjoy viewing many forums at once and switching between them without leaving the page. We hope that fluid view, the new functionality is an asset that you enjoy .
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WaveWacker

Another prop ??

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Great post in the past on prop/pitch questions. Here is another quick one. A friend of mine is running an older 1890 Lund Pro V (Just had it refurbed, it looks great), and has that coupled with a new Yamaha 115hp 4 stroke. I believe he is running a 13" pitch Alum. prop on it (not sure of dia.). I believe the suggested "high end" rpm's is around the 5000-6000 range and he feels that it is over rev-ing as it is running over 6,000rpm when opened up (about 6300 I would guess). He also gas the same pitch SS prop. From what I can remember last fall the SS had even higher rpm's. That makes sense to me because there would be less flex in the SS, right? If a person is running to high rpm's with a 13" pitch Alum. prop would going to a 15" pitch SS be right or would one have to go even more (17") to get the high end rpm's to be right?

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An 1890, I would say that this a older one smile.gif

The rule of thumb for pitch is, for every two inches of pitch increase you will loose 200 rpm. If he is running a 13 on that combo and getting 6300 rpm, I would really consider a 17 or maybe a 19 inch pitch.

I have a 70 on the back of a 17 foot crestliner and am pulling 5300 with a 17" pitch prop and that seems to just about right. Comes out of the water and on plane right now and cruises to 35 mph without any bogging or lugging.

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The 115 four strke yamaha is supposed to operate at 6000 rpm at wide open throttle. I am actually surprised the stainless has higher rpm. Check the diameter of the two props and I bet the stainless has a smaller diameter but same pitch.

All other things equal a stainless should run lower rpm then an aluminum because of the increased cupping and greater resistance due to the fact that the blades don't flatten under heavy load like aluminum does.

Based on the info, I think a 15 would be fine. You want to get the 6000 rpm's at full throttle with the boat loaded as it would normally be...(full tank of gas, 3 or 4 people, gear, etc.)

Otherwise, lets say you get a 17 and run 5900 rpm at full throttle with just one guy in the boat and no gear at a faster top speed than the 15......All is good right.

Then you fill the tank and add 2 or three guys to the boat and suddenly at full throttle you can only get 5000 rpm and the boat doesn't plane out worth a crud.

You just have to weigh your options.

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Oh I see, it is a matter of the alum flattening out more and not "grabbing" as much water. I was under the impression that the alum. would "open up" an grab more water at higher rpm's. I may be wrong on the SS running higher. I'll have to check with him on the diameter's. Makes perfect sense. I think what he is looking for is to not over rev. under normal weight conditions but still not go too large of a pitch that it speeds up his min. troll speed. Keep any more imputs coming in. Thanks.

WW

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Wavewacker,
I also have a new Yamaha 115hp Four stroke. It's fitted with a Hustler 13.25" with a 17" pitch. I posted similar questions regarding dia. and pitch. Yamaha-motor.com under the accessories section answered a lot of my basic questions. They have a nice chart that shows some average speeds you can expect with different sizes and pitches of props. However I have yet to find out for sure if you can lower the dia. of a prop while increasing the pitch to try and increase top end speed. Or if that defeats the purpose. Anyway, just wanted to pass the HSOforum along.
STARMAN*

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