Trim Tabs on my 12 foot Alumacraft?

Home Forum Ask A Member Trim Tabs on my 12 foot Alumacraft?

This topic contains 21 replies, has 12 voices, and was last updated by Avatar westwind 5 days, 10 hours ago.

Viewing 15 posts - 1 through 15 (of 22 total)
  • Avatar
    huntleybill
    US Member - 1 Year
    Replies: 216
    Topics: 81
    #178611

    I have a 12 foot Alumacraft that I use to test run motors after restoring them. The boat is rated for up to 12HP motor. I have a Sea King 12 HP on it and went out last weekend to give it a test run. The bow of the boat was WAY up in the air upon acceleration and the boat was almost scary unstable.

    I have tried tilting the motor but the bow going up doesn’t get better, and sometimes gets worse. I move as much weight as I can to the front and that helps a little.

    Someone had mentioned putting trim tabs on the back of the boat. I didn’t know there was such a thing for a 12 foot boat. I know there are “powered” trim tabs for bigger boats but I have no “power” per se on my little boat. Where can one purchase them? Can they be made? What did you do to solve this issue on your boat?

    Your advice on helping with this issue is appreciated.

    Thank you
    Bill

    • This topic was modified 1 week, 2 days ago by Avatar huntleybill.
    • This topic was modified 1 week, 2 days ago by Avatar huntleybill.
    • This topic was modified 1 week, 2 days ago by Avatar huntleybill.
    Avatar
    amuller
    US Member - 2 Years
    Replies: 845
    Topics: 134
    #178614

    I don’t know what “stabilizers” means in this context.

    What you will probably have to do is change the weight distribution. You could use a tiller extension and sit forward, but that won’t help too much if you need to fiddle with motor adjustments. Sandbags in the bow might help.

    Avatar
    kerry
    US Member - 1 Year
    Replies: 329
    Topics: 15
    Avatar
    huntleybill
    US Member - 1 Year
    Replies: 216
    Topics: 81
    #178619

    Thank you. Putting sand bags in the bow just ads more weight in the boat. Yes, it will help keep the bow down , but I was hoping for a better solution.
    Kerry, I don’t know if I seriously want trim tabs. I’m not sure what the best solution is. Which is why I am here asking 🙂

    I found “hydrofoils” that say they do the same thing as trim tabs but I have no experience with either one. So, I was hoping to get feedback from you folks.
    Would a hydrofoil work in my situation?

    Avatar
    Samuel Phelps
    US Member - 1 Year
    Replies: 32
    Topics: 4
    #178622

    When you say you tilted the motor and it got worse . You mean that you lifted the foot of the motor up like tilting up ?
    Yes that would make it worse . You need to lower the foot as far down as you can go or even install transom wedges to get more down angle on the motor ..Also if your running long shaft motors on a short transom that would cause some problems .. If you want tabs these work pretty good also. https://www.iboats.com/shop/nauticus-sx-smart-tabs.html?gclid=CjwKCAjw04vpBRB3EiwA0IieajQLFedizOjvfJHIhxgzy4O_jUaHD5n6ykrFcUmoYPqF5G0Hcfh35BoCmW0QAvD_BwE#configurable_option=For%2015-19ft%20Boat%20and%2060-150HP
    They will help you get on plane pretty quick …

    David Bartlett
    David Bartlett
    US Member - 1 Year
    Replies: 124
    Topics: 6
    #178623

    Not to be a smart Alec, but how much weight are you talking about? Total operator, fuel, etc.

    Take everything you don’t need and leave on shore.

    If you need to add weight up front use water jugs rather than sand as it has neutral buoyancy if something bad happens.

    Avatar
    jeff-register
    US Member - 1 Year
    Replies: 1088
    Topics: 46
    #178627

    Different props add advantage. Not sure what you are running. Please evaluate.

    Mumbles
    Mumbles
    Canada Member - 2 Years
    Replies: 4104
    Topics: 420
    #178652

    Bring a friend with you so he can sit up front and then both of you can enjoy the ride.

    Avatar
    huntleybill
    US Member - 1 Year
    Replies: 216
    Topics: 81
    #178654

    When you say you tilted the motor and it got worse .

    Yes. it did. I also have the motor IN as far as it will go. Still the problem. No, it is not a long shaft. Just your everyday 1958 Johnson 10HP.

    adding sand bags, water jugs, or bringing a friend but then taking everything I don’t need ( like my annoying friend) and leaving it on the pier does not seem the best solution. (but then, what do I know)

    Let me re-phrase the question: Trim tabs or hydrofoil, has any one used either of these devices on a small boat such as mine and did they work to correct the issues I described?

    Tubs
    Tubs
    US Member - 1 Year
    Replies: 2266
    Topics: 128
    #178655

    Avatar
    westwind
    Canada Member - 1 Year
    Replies: 344
    Topics: 8
    #178678

    What model is your Alumacraft, besides 12 ft? The model # should be on the transom brace, a letter at the start of the serial #

    Avatar
    huntleybill
    US Member - 1 Year
    Replies: 216
    Topics: 81
    #178679

    What model is your Alumacraft, besides 12 ft? The model # should be on the transom brace, a letter at the start of the serial #

    E 1449

    Avatar
    westwind
    Canada Member - 1 Year
    Replies: 344
    Topics: 8
    #178685

    The model E is a narrow boat, I’d say it doesn’t have enough displacement at the transom to support the weight at the back. Removing weight at the transom or adding it at the bow are your best choices. A tiller extension and sitting forward might be a good choice. I have a Model A that is similar in width to the Model E, but longer at 14ft. It likes to lift the bow some, without some ballast of a tiller extension. Picture attached.

    Attachments:
    Avatar
    huntleybill
    US Member - 1 Year
    Replies: 216
    Topics: 81
    #178688

    I am going to take off the 12HP Sea King and put on my ‘5710HP Johnson. I’ll extend the hose on the gas tank and move it forward. I also ordered a hydrofoil on ebay. I’ll try that first and see how that works.

    Avatar
    foot_doctor
    US Member - 1 Year
    Replies: 53
    Topics: 8
    #178691

    My thought is that you will be less than satisfied with your trim tab effort, but it’s certainly worth a try. Mount them as close to the outside edges of the bottom as possible. The fact is that the E and A models have a very narrow bottom, with an almost canoe like rounded profile. We have only had acceptable results with 5 to 7.5 horsepower engines on those narrow, round bottom boats. You will be much more successful with an Alumacraft model that has an F in the model number. FL, FD, etc. Their bottoms are wide enough to support the engine’s and your weight, while providing a large enough flat planing surface. E models were primarily meant for resort and car top service, with low horsepower outboards. Have fun boating. R.T.

Viewing 15 posts - 1 through 15 (of 22 total)

You must be logged in to reply to this topic.