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

It's easy - LOOK UPPER right menu.

  • Announcements

    • Rick

      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 .
Sign in to follow this  
GBPackerNut

Four Stroke planing problem???

Recommended Posts

Ok took the new boat out for the first time last night. Had some problems planing.

This is my first 4 stroke, so maybe the way it sounds and operates is different, I don't know for sure. I tried about 6 or 7 test runs, at different trim levels to make sure that wasnt the culprit. It is a Alumacraft Yukon 165, with a Yamaha 40HP four stroke. I tried to look at the prop but I cannot figure out what pitch it is.

When I go to open it up, she lifts the bow like its trying to pop up on plane, but just short, the motor sounds like its almost dogging a little bit as the rpms slowly increase the speed ever so slowly increases also until after about what feels to be 30 seconds or more finally she pops on plane and boom its like the after burners kick in and the motor finally starts winding up, and were moving along at a really good clip. But I cannot tell if were getting up to full operating RPM's though, this motor sounds so different to my ear its hard for me to know.

Does it sound like I just have too much prop, and need to change pitch? or is this normal for the newer 4 stroke motors?

Also does anyone know how to connect a tachometer so I can check the operating RPM's?

I will bring a stopwatch and gps along on the next outing to get actual speeds and times.

Share this post


Link to post
Share on other sites

Without being there its a little difficult to diagnose but two things come to mind. First, your trim angle. You did not say if it was power trim, I will assume it is. You want to start out with the motor trimmed all the way in (down). This "forces" the back end up and front down which pops you up on plane quicker. Once on plane, you will want to trim your motor out (up) until (absent a tach) the steering get's light and neutral - you will be close then. In waves or making a sharp turn, you will want to bring the motor in (down) a bit. If no power trim you will have to compromise - in this case I would set the cavitation plate so it is about parallel with the bottom of the boat. The second thing I would look at is prop pitch. If too big a pitch, your hole shot will not be good and you will lug the motor (it's like starting your car in second or third gear). This is hard to correct without a tach as you want to run at the max RPM's for your motor with your normal load. That way if you add a person or gear you will only drop down into the min range. I.e. - if motor is 5500 - 6000, with normal load shoot for 6000. Absent a tach there are prop folks who could probably get close based on the boat type, weight, etc. Hope this helps. Paul

Share this post


Link to post
Share on other sites

Good post PT!

I will agree in that from the description of dogging while trying to get on plane, then taking off and winding up, that it sounds like the motor is trimmed or set too high. Try trimming or setting the pin in (closer to parallel to the bottom of the boat, as PT mentioned) and see if it planes off any easier. If it works it's an easy and cost effective fix!

Share this post


Link to post
Share on other sites

Yeah it has power trim, I tried it all the way down, and several other angles just to make sure,

I was loaded pretty normal for how I am going to use it, maybe the boat is propped for the previous owner. I added one more passenger (225 pounds) and another trolling motor (45 pounds) plus I probably weigh about 50 pounds more than the previous fella.

Here are the boat specs

2006 Alumacraft Yukon 165

16'6" length, 76" Beam, 725 pounds dry

2006 Yamaha F40TLR

Weights

195 Motor

55 Fuel

150 Batteries

20 Charger and wiring

45 Vector trolling motor

45 PowerDrive trolling motor

25 Anchor

75 Misc Gear

450 People in the boat

====

1050 Weight of all items not including the boat

+725 Dry weight of boat

====

1775 pounds total weight.

So I don't think I am loaded too heavy, as I am still 400 pounds under its rated capacity, and the boat doesn't seem sluggish once I am on plane.

Share this post


Link to post
Share on other sites

If you tried starting out with the motor all the way in and still not getting on plane easy then you may need to look at propeller pitch. Your "normal" load does sound quite a bit heavier than the previous owners - it also sounds like you may have added a significant amount of that weight more to the back of the boat (additional passenger, your add'l 50#'s, not sure on the trolling motor or batterie(s)). This is also not going to help you pop on plane quickly. For context, I hit my max RPM's for my normal load (me, 1 livewell (30 gal), all my gear and full tank of gas) - if I add 2 people and their gear I am about at my min. Depending on what RPM the previous owner was running at - you may need to go down pitch angle or even two on the prop. You may also want to try to shift some of that weight forward (if possible). Owning two props is not the end of the world, one for lighter loads, one for heavier loads - use the other as a spare in case of trouble. One thing I can say for sure - you definately do NOT want to keep lugging the motor (if that is what you are doing), eventually you could do come damage that will be expensive. Good Luck. Paul

Share this post


Link to post
Share on other sites

Well I went home, I think I am pretty sure its over prop'd

Pulled the prop off and its a 10" diameter x 15" pitch, which is pretty aggressive for my boat combination.

Most of the reviews I have seen are guys using a 12" pitch prop on a similar style boat.

so now I need to figure out if I want to step down to a 12 or 13...

Darnit, I was hoping I wouldn't have to spend more on a boat I just bought 2 weeks ago...

Share this post


Link to post
Share on other sites

See if the dealer will be willing to swap it out since they should have given you a little more direction in this area. Hopefully you haven't found any rocks with the prop yet.

Share this post


Link to post
Share on other sites

If you bought the rig from a private party, call Alumacraft/Yamaha dealers and ask what the right prop would be. I'm sure there are quite a few sold in that combo. Dealers might be a little testy right now---the week after opener can be kinda crazy.

However, there is no substitute for having a tach in the boat--you will know for sure you are propped right (being at or close to max rpms, and not overrevving). The 40 is a sweet motor but with your boat loaded, it will need to be propped right.

Good luck.

Share this post


Link to post
Share on other sites

I.e. - if motor is 5500 - 6000, with normal load shoot for 6000. Paul

This got me thinking. I have a 2007 Merc. 4-Stroke. According to my owners manual, my motors max. RPM range is at 6000. It also says that WOT should be 5500-6000 RPM. Now, I run right at 5400-5500 RPM at WOT. Would one think I need to change out my prop (I.E. to gain that additional 500-600 RPM)?

Share this post


Link to post
Share on other sites

steffanf, It sounds like you are running pretty good as is. To swap the prop in an attempt to gain a couple hundred rpm will be a costly outlay for relatively little performance gain. What performance criteria would you like to improve; top end, load carrying, hole shot, other?

Share this post


Link to post
Share on other sites

a hydrofoil works great for planing all boats including overweight underpowered rigs (four strokes). If u get propped right and it still won't plane well this would be your best option.

Share this post


Link to post
Share on other sites

a hydrofoil works great for planing all boats including overweight underpowered rigs (four strokes). If u get propped right and it still won't plane well this would be your best option.

Probably the cheapest and easyest way to fix (minor) planeing issues. A Hydro runs about $50, and is very easy to install.

Sounds like your issue is getting out of the hole. On plane your ok. I would go this route first, then worry about buying a new prop.

Share this post


Link to post
Share on other sites

Sounds like something needs to be done / changed, but I'm hoping you've done the proper break-in on this motor before all this. Good luck.

Share this post


Link to post
Share on other sites

New prop on the boat was just too much prop.

Will test this weekend hopefully, it should be here today.

Break in, I hope the previous owner broke it right also. only time will tell.

Share this post


Link to post
Share on other sites

steffanf, It sounds like you are running pretty good as is. To swap the prop in an attempt to gain a couple hundred rpm will be a costly outlay for relatively little performance gain. What performance criteria would you like to improve; top end, load carrying, hole shot, other?

That's kind of what I thought... everything seems to be OK. With the current prop I have on now, I have no problem getting up on plane. The top-end speed looks good too (no speedometer, so not exactly sure). I just want to make sure it's not running incorrectly at just the 5400-5500 RPM that I get now.

Share this post


Link to post
Share on other sites

I think you'll be ok here as well... if you dropped some prop pitch you'd get a better holeshot and a slightly slower trolling speed, but lose top end. If you're satisfied with your holeshot then I'd stay where you're at.

marine_man

Share this post


Link to post
Share on other sites

4 strokes have a history of not getting on plane fast. A lot of people when buy boats try to save a buck and get a smaller motor.

The first boat I bought had a 40 HP what a dog. When you have more than 1 person in the boat. I got a 50 HP and it was like nite and day. You see a lot of boats for sale with less than max. HP on them. Thats why they are for sale.

Share this post


Link to post
Share on other sites

Planing problem fixed.

New Solas 11.4" dia X 12" pitch prop works like a charm!

With full load she lifts real nice now pops up on plane, no problems. And we get about 36 to 38 mph according to my Lowrance sonar (has a little wheel sensor that is on the transom) and the RPM's sound about right.

And if I am out all by myself, and take some gear out( remove 500 pounds or so) , I am getting close to the RPM limit but not over revving it.

I understand what you are saying Charley, and yes it would be great to have a 50 E-TEC or opti (if they made one that small) but really a 40 on my boat is fine. And yes a 50 would be a 25% increase in power, it would be like going from a 100 to a 125...

I personally feel a 40 is fine on the boat I have, really no good reason to spend a bunch more money to only gain a few mph on the top end.

And anyone looking for a prop, give Jay at Soderblooms a call, he was right on, told him which boat, motor, weights and all, and he hit the nail right on the head!

Thanks m_m for getting me his info.

Share this post


Link to post
Share on other sites

And we get about 36 to 38 mph according to my Lowrance sonar (has a little wheel sensor that is on the transom) and the RPM's sound about right.

Sounds a bit optomistic on the speed, but I'm glad you got it figured out.

If you don't mind, how much did that prop cost you?

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  



  • Posts

    • I have a Minnkota 12V bow mount trolling motor but need a foot pedal as mine isn't reliable and they discontinued the product.  The connection of the cord is a little over an inch and oval in shape.  Thank you!
    • The wife and I have different tastes so I usually use an off the shelf prime rib rub and finish up with coarse ground salt and pepper. There are lots of great rub recipes out on the net depending on your taste and company
    • Good catch of the actions and reactions of the walleyes down there.
    • Nice catch for your little boy!
    • Drumming at night.  Did you go after them with you burlap bag and flashlight? 
    • The more i research there seems to be a consensus that there is not a reasonably priced inline reel on the market worth the price tag.  Along those lines i dont recall too many of the guys making a living in the industry using them, even though a few promote them.  Think mr genz, he has his name on an inline but i dont recall any youtube footage of him using one.  
    • I was sleeping in the topper of my truck two weeks ago and it was *thump....... thump........thumpity thumpity* all night long.  Maybe it's the yearlings just figuring stuff out and finding themselves? Young males thinking they are all that?
    • This looks promising.  Usually have the little guys but a little more age in these two. 
    • I’ve heard drumming deep into the summer when I was out trout fishing. I thought that was a little odd. It’s one of the nicest sounds to come out of the woods though, so if they do it year round, I’ll take it!
    • Fall colors are now peaking in far northwestern Wisconsin and throughout the central part of the state including the Door County area, according to the Department of Tourism's Fall Color Report. Fall colors are now past peak in about a dozen north central counties and leaves are dropping rapidlyFall colors are now peaking in Door County. Photo from Oct. 19 from atop "Old Baldy" sand dune at Whtiefish Dunes State Park.Photo Credit: DNRMuch needed rain in the last week finally spurred on the fall Lake Michigan tributary salmon runs. The chinook spawn is going strong, with a variety of baits and methods seeing success. The chinook spawn is in full swing along Door County with salmon spotted in most marinas and in many area creeks. In the Kewaunee harbor, salmon can be seen jumping regularly and have been stacking up in corners in force and numbers, and anglers are having success with both spoons and crankbaits. Fish have been so thick at times that anglers have foul-hooked more than they have had strike. The salmon spawn is also in full force in the East and West Twin, Manitowoc, Branch and Ahnapee rivers. Chinook salmon are the most common catch but a few coho are also being caught. In southern tributaries, those fishing the Sheboygan River reported most of the success from chinook and coho salmon along with a few brown trout. At Sauk Creek a few chinook were landed on flies and spoons. On the Root River were chinook the majority of anglers targeting and seeing success upstream of the steelhead facility and fishing with egg flies. .
  • Our Sponsors