Guests - If You want access to member only forums on FM. You will gain access only when you Sign-in or Sign-Up on Fishing Minnesota.

It's easy - LOOK UPPER right menu.

  • RECEIVE THE GIFTS MEMBERS SHARE WITH YOU HERE...THEN...CREATE SOMETHING TO ENCHANT OTHERS THAT YOU WANT TO SHARE

    You know what we all love...

    When you enchant people, you fill them with delight and yourself in return. Have Fun!!!

  • 0
Sign in to follow this  
wastewaterguru

props for Yami 115 Four Stroke

Question

wastewaterguru

Does anyone else have a Yamaha 115 four stroke on a 17 to 18 foot Lund. I have tried several different diameters and pitches and want to hear what other people have learned from their experiences.

I think I have a 13.75" Diam. x 15 pitch on it now cause my wife and I were doing some tubing and skiing last fall. Aslo have a 19 pitch that gives me a better top end (45 mph at 5300 rpm versus 36 at 5800 rpm for the 15 pitch).

I'm pretty happy with the performance but there are a lot of sizes I haven't tried and I have to be careful with the 15 pitch prop to keep my rpm's below the 5500 recommended by Yamaha. I would change this one, but a fat guy like me needs al the help he can get to get to the power band of the motor faster or I'd never get up behind that 115.

Any knowledge or advice for this motor/boat combo would be appreciated.

Lund 1700 Fisherman (17'5")Walkthrough
Yammi 115 Four Stroke.


Thanks,


------------------
John K., a.k.a. wastewaterguru
Prior Lake, Minnesota

[This message has been edited by wastewaterguru (edited 03-08-2002).]

Share this post


Link to post
Share on other sites

8 answers to this question

Recommended Posts

  • 0
Guest

John,

I've got the same set-up (2001 Lund Fisherman with Yamaha 115 4-stroke). I currently have the "stock" aluminum 13.75 x 17 3-blade and get 40MPH at about 5400 RPM with a two person and gear load. Take my tach readings with a grain of salt because the stock tach is questionable. It likes to wave back and forth over a couple hundred RPM range even when I am holding RPM steady. I don't trust it at all. I plan on picking up a digital TinyTach ($40) before I get too crazy with the props.

The boat likes to plow unless the motor is trimmed way out and then I have problems with ventilation in corners. The low bow helps in rough water as the waves hit the V instead of smacking into the flat part of the bottom but it kills the speed on calmer water.

I'll start messing with props this year and was thinking of trying the Mercury TrophyPlus 4-blade or Laser II. My main goal is to get better bow lift with less engine trim and also eliminate the ventilation when turning. More speed would be great too but that's # 3 on the list. I assume hole shot would be better with the 4 blade.

The Yamaha manual gives an RPM range of 5000-6000 at WOT so I'm wondering where you saw the recommended 5500? Please advise. I'm also trying to get my hands on horsepower and torque curves to see where the optimum RPM actually is. So far, no luck.

Thanks and good luck,
Dave

Share this post


Link to post
Share on other sites
  • 0
Rippinlip

I have on older 90 horse Yamaha and the only thing I have to say is go Stainless in whatever pitch you decide, bought a Aluminum prop to make do for a back-up while I had my stainless re-balanced and oh my goodness what a difference. Lost hole-shot and top end while watching my tach go thru the red zone. I do believe the optimum range is around the 5500 RPM zone, I called a local dealer last year and that is what he said I should be running with load weight and trimmed out.

Share this post


Link to post
Share on other sites
  • 0
wastewaterguru

Thanks for the info guys.

Gunner1, let me know if you find the HP and torque curves. The 5500 is what the dealer recommended I target. Manual says 5000-6000.

------------------
John K., a.k.a. wastewaterguru
Prior Lake, Minnesota

Share this post


Link to post
Share on other sites
  • 0
oilguy

1800 pro v full load of fuel and equipment.
motor came with 13X19 yam aluminum was able to get 42 @ 5200 and boat plowed. went to Solas 13.25X17 same performance able to run slightly more trim which helped plowing. went to 13.375X15 boat runs 39 @ 5800 (perfect) can run as much trim as I ever need. The Solas aluminum props tend to develop a cavitation spot about the size of a quarter near the middle of the blade after very few hours. They are inexpensive though. If you do much Canadian fishing (rocks) I'd suggest staying with the aluminum props, they could save you a lower unit. Would like to hear some more on this thread.

Share this post


Link to post
Share on other sites
  • 0
Dan L

I have a 115 Yamaha four stroke on a 1750 Crestliner Fishhawk. I tried a few different props and the one that worked best was the 19" Yamaha black painted stainless steel prop. My top end is 45 MPH and my top RPM is 5800. You can run that motor up to 6000 RPM's. I think you get the most out of your motor by getting close to the top of the RPM range. Remeber that if 2 props have the same pitch that doesn't mean that they will perform the same. Some props have a more aggressive blade.

Share this post


Link to post
Share on other sites
  • 0
wastewaterguru

I'll have my boat out Saturday in Redwing. I'll get a little more information on rpm vs. speed and trim and will give an update on Monday. Can't go all out on rhe river this time of year because of traffic, dead wood, ice, etc. but I should be able to get some info.

------------------
John K., a.k.a. wastewaterguru
Prior Lake, Minnesota

Share this post


Link to post
Share on other sites
  • 0
wastewaterguru

I also had the same problems that gunner1 has. The Lund Fisherman owners that I know (4 total) all have yammi 115's and all have complained about air entrainment/cavitation when cornering. The way the setup is, you have to trim the motor out so far to lift the bow that there is not enough prop left in the water when trying to turn. I have found that I have to lower the trim in preparation for a high speed turn to prevent the cavitation. Does anyone know how to solve this problem? Is the motor mounted too high on the transom (is that even adjustable)?

------------------
John K., a.k.a. wastewaterguru
Prior Lake, Minnesota

Share this post


Link to post
Share on other sites
  • 0
oilguy

It always gives me that warm fuzzy feeling to know that we (Lund owners) get to figure these bugs out. IMHO,if a few professional engineers were involved in design process, maybe things would be a little different. What the #%$^ we buy those red boats anyway!

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  



  • Your Responses - Share & Have Fun :)

    • monstermoose78
      You going to help me find some active fish @Cret Jigs 
    • Cret Jigs
    • eyeguy 54
      quite a few drifts where we were at. no 12 inchers but came close a few times. Smokin time friday.   grandkids are here and really enjoyed the cleaning process. Edin says,  his mouth is moving.  I bet he is saying why are you doing this to me...  LOL  gonna be 4 on Sunday. 
    • Tom Sawyer
      Can't believe there's that much snow left today....
    • eyeguy 54
      Found some dandies today for the smoker. Snow covered areas better than bare ice. 14 feet. 
    • Rick
      Fixed, thanks for the heads up.
    • Rick
      A series of events celebrating the 10-year anniversary of the passage of the Clean Water, Land and Legacy Amendment will take place throughout Minnesota in 2018. The first of these events will be from 1 to 4 p.m. Saturday, Jan. 27, at Silverwood Regional Park, 2500 County Road E, St. Anthony.  Adults and kids who attend the Parks and Trails Legacy Celebration at Silverwood Regional Park can try kick-sledding, ice fishing, a snowmobile simulator and other indoor and outdoor activities. Visitors can also hike among art sculptures throughout the park. Between activities, there will be s’mores and other light refreshments around a crackling bonfire. “The passage of the Legacy Amendment was a game-changer for organizations working to support Minnesota’s outstanding system of parks and trails,” said Erika Rivers, director of the DNR’s Parks and Trails Division. “At this event, and the statewide events to follow, we will not only highlight what has been accomplished over the past decade with Legacy funding but, perhaps even more important, we will gather input from people throughout the state—adults and kids alike—to help shape priorities moving forward.” Staff from the Minnesota Department of Natural Resources, the Metropolitan Council and the Greater Minnesota Regional Parks and Trails Commission will be on hand throughout the afternoon to lead activities and gather ideas. Metro Transit is providing free rides to the event. Get a downloadable bus pass at www.legacy.leg.mn/ptlac/2018-regional-events. Future Parks and Trails Legacy Celebration events will take place: Friday, April 27, 4-7 p.m., at the College of St. Benedict in St. Joseph. Saturday, May 5, 1-4 p.m. at the Red Baron Arena in Marshall. Friday, May 11, 4-7 p.m., at Hyland-Bush-Anderson Lakes Park in Bloomington. Saturday, May 19, 1-4 p.m. at 125 LIVE in Rochester. Saturday, June 2, 1-4 p.m. at Itasca State Park in Park Rapids. Saturday, June 16, 1-4 p.m. at Prairie Wetland Environmental Learning Center in Fergus Falls. Wednesday, June 27, 1-4 p.m. at Essentia Health Duluth Heritage Sports Center in Duluth. For more information, visit www.legacy.leg.mn/ptlac. For accommodations to participate, please contact Paul Purman at the DNR, paul.purman@state.mn.us or 651-259-5643. Discuss below - to view set the hook here.
    • wildsmallie
      Which river is good for char?
    • leech~~
      Here's a little back ground. The Dakota originally called the lake Mde Maka Ska (modern spelling Bde Maka Ska, pronunciation: Be-DAY Mah-KAH-Ska)[5] meaning White Earth Lake,[6] or White Bank Lake,[7] a name that probably was given by the Ioway who inhabited the area until the 16th century. Another Dakota name for the lake may have been Mde Med'oza, which was the name initially adopted by settlers, either as Lake Medoza or in translation as Loon Lake.[8] The Dakota also described it as Heyate Mde, meaning "Lake Set Back (from the River)".[9] The United States Secretary of War, John C. Calhoun, sent the Army to survey the area that would surround Fort Snelling in 1817. Calhoun had also authorized the construction of Fort Snelling, one of the earliest Euro-American settlements in the state. The surveyors renamed the water body "Lake Calhoun" in his honor. The Fort Snelling Military Reservation survey map created by Lt. James L. Thompson in 1839 clearly shows the lake as bearing the name "Calhoun".[10] Minneapolis skyline reflected in the lake in 2010 Calhoun's legacy as a pro-slavery politician has led critics to question whether he is the best person to be honored. In 2011 the Minneapolis Park and Recreation Board visited the issue. Their legal counsel concluded that the board could not legally change the name, as state law gives that power to the Commissioner of Natural Resources, and then only in the first 40 years after the name was designated. Following the Charleston church shooting in June 2015, a fresh drive to change the name started via an online petition. The Park Board indicated it would look into whether they could change the lake's name through state action,[11][12] and in fall 2015 added the Dakota name to signage below the official name.[1] On March 22, 2016, an advisory group decided via majority vote to urge the Minnesota Park and Recreation Board to restore the lake's former name.[13] In 2017, the Minneapolis Park Board voted unanimously to change the lake's name back to that of Bde Maka Ska[14] and the Hennepin County commissioners approved it more narrowly.[15] The change needs final approval at state and federal level in order to go into effect.[16] There was also a proposal to rename the lake for Senator Paul Wellstone, who is buried in nearby Lakewood Cemetery.[17]
    • Rick
      The Minnesota Department of Natural Resources today announced the State of Minnesota has approved changing the name of Lake Calhoun in Minneapolis to Bde Maka Ska. The DNR’s decision follows a Hennepin County Board resolution requesting the change.  “The DNR respects the role of elected county boards in determining name changes for geographic features,” DNR Commissioner Tom Landwehr said.  “In this instance, I am confident the Hennepin County Board carefully considered community values and citizen perspectives in determining that this was the right action to take. DNR’s role is to ensure the county followed the proper process.” The DNR’s decision means the lake name change will become official in Minnesota when the DNR’s approval is officially recorded by Hennepin County and published in the State Register. Hennepin County commissioners voted to seek the name change Nov. 28. The DNR will submit the Hennepin County resolution, along with the state approval, to the U.S. Board of Geographic Names, which will approve or deny the name change for federal use. The DNR is the state agency that approves or denies name changes for geographic features, after Minnesota counties consider name change resolutions, gather public input and vote on proposed changes. In considering county requests to name a geographic feature or change a feature’s name, the DNR’s role is to consider 1) whether the county followed a proper public process prior to taking its action, and 2) whether the county-approved name complies with naming conventions. For example, names must avoid confusion with similarly named features, and names may not commemorate a living person. A copy of the DNR’s order for this name change and details on how Minnesota geographic features are named are available on the naming geographic features webpage. Discuss below - to view set the hook here.
  • Share & Have Fun