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Jack plate vs tilt n trim

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  • Jack plate vs tilt n trim

    Hey guys kind of a noob question...

    first off i am in the prop section because this has alot to do with prop, of theres a more appropriate place, admin please go ahead and move it. I have a 18ft starcraft alum. Fishing boat, transom is in good shape and im looking to repower... whilst id love to get a newer outboard with tnt, budget may require me to get an older motor with manual tilt for the time being. This boat has a large splash well and i use it in some tough areas where ot gets skinny or stumpy on occasion, manual tilt is a BEAR. I have been looking at various power trim units as well as hydraulic jack plates. Obviously if one has to choose between trim or jack, most would say trim, but since i eventually want to get a motor with integrated power trim n tilt, i am considering a hydraulic jack plate. My thoughts are that with enough setback i can set the manual trim pin and use the jackplate to achieve correct prop depth while underway and easily raise the skeg up in the shallows or while beaching the craft... and i'd just use the manual tilt to trailer the boat.


    my concern is that a jackplate may not give enough lift range to have good prop bite AND decent clearance but i have no experience with jackplates and it seams a lot could be done with 10 inches of setback.


    Intended uses are fishing, tubing, and tending decoys (hunting from a layout boat)
    looking at motors in the 75-100hp range.

  • #2
    FWIW.... most flat boats have both. jack plate and TNT.
    Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

    1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

    Past Boats
    1970 Wooster Hellion - Merc 9.8
    2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
    1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

    What’s behind you doesn’t matter.Enzo Ferrari

    Comment


    • #3
      I'm going to assume you are considering a jack plate that would allow trimming height while under way? If so, considering the expense of something like that, I would re-power. If you sell your engine and take that money and add it to what this jack plate idea is going to cost, you shouldn't have any problem coming up with a newer engine that's equipped with tnt. Further, the OEM tnt is lighter, less bulky, and much more reliable, in my experience anyway.

      Comment


      • #4
        Originally posted by Scott Danforth View Post
        FWIW.... most flat boats have both. jack plate and TNT.
        I would have both in the end if i go with a jackplate now...

        Comment


        • #5
          Originally posted by ahicks View Post
          I'm going to assume you are considering a jack plate that would allow trimming height while under way? If so, considering the expense of something like that, I would re-power. If you sell your engine and take that money and add it to what this jack plate idea is going to cost, you shouldn't have any problem coming up with a newer engine that's equipped with tnt. Further, the OEM tnt is lighter, less bulky, and much more reliable, in my experience anyway.
          Yes on the fly jacking, but i guess i wasnt clear. I am repowering, the old motor is just inadequate. My concern is an older manual trim motor can be had for under 500 bux, and its gonna be 2500ish for a newer power tilt that's what i want more permanently. So 1000 beans for a jackplate would be still a conaiderable savings at this juncture, and i know i can sell the 500 dollar motor later on to go toward the better motor. I guess my biggest question is " will the jack plate give enough range to not need to tilt in the shallows, yet still grab clean water on plane ?"

          Comment


          • #6
            I’m confused.... you can buy a new to you 75Hp motor with OEM trim and tilt for roughly the same money your quoting for just trim and tilt.

            How deep of water are you planning on running? I’m good to 18” running tilt in a much larger, heavier boat.

            Different prop designs like to run at different depth. A jack plate is a means of fine tuning a props depth for optimal performance, typically on high performance boats.

            Since your not in a performance situation or run multiple props, your best bet is to get a motor with T&T and call it good.
            ....

            Comment


            • #7
              We have had a couple different JP's on 14-16 ft aluminum boats. We have adjusted, and even tried different JP's, to get the outboard where it needs to be for running, and getting into shallow water. So I think it depends on what unit/setup you end up with. On your biggest question, I think it is possible. But I'd say get what you want "permanently" up front and start enjoying it sooner rather than later - then again, if cash flow won't allow that in your mind - you gotta do what you gotta do

              Comment


              • #8
                I agree, you can get a new to you (used) motor in great shape with factory TNT for about $1000. powered jack plates can be found used for as low as $300
                Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

                1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

                Past Boats
                1970 Wooster Hellion - Merc 9.8
                2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
                1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

                What’s behind you doesn’t matter.Enzo Ferrari

                Comment


                • #9
                  Originally posted by Scott Danforth View Post
                  I agree, you can get a new to you (used) motor in great shape with factory TNT for about $1000. powered jack plates can be found used for as low as $300
                  Factory tnt motors in that price range are not found in my area, the cheapest ive found was 1200 and it needed major wprk and no controls


                  if trim is that much better to have then i can get the cheap motor and a 700 dollar hydraulic trim unit and be about 1200 into it. Maybe id find that im satisfied with that setup and it may become permanent? Maybe if i find what im ultimately looking for in a couple seasons, i can sell the aftermarket tnt and buy a jackplate to have both?

                  Comment


                  • #10
                    Originally posted by garbageguy View Post
                    We have had a couple different JP's on 14-16 ft aluminum boats. We have adjusted, and even tried different JP's, to get the outboard where it needs to be for running, and getting into shallow water. So I think it depends on what unit/setup you end up with. On your biggest question, I think it is possible. But I'd say get what you want "permanently" up front and start enjoying it sooner rather than later - then again, if cash flow won't allow that in your mind - you gotta do what you gotta do
                    Thats the thing, there's not the cash flow this year to get a tnt injected motor... theres other needs in the budget rn alot of one time stuff that wont be there next season. And doing nothing isn't an option because the 30hp that came with this boat is inadequate to the point of being a safety concern.

                    Comment


                    • #11
                      Originally posted by tramsdell View Post

                      Factory tnt motors in that price range are not found in my area, the cheapest ive found was 1200 and it needed major wprk and no controls
                      look outside your area.

                      I picked up a motor in Missouri a few years back and I live in FL because it was a good deal. dont be afraid to spend $300 on gas to save $1500 or more
                      Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

                      1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

                      Past Boats
                      1970 Wooster Hellion - Merc 9.8
                      2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
                      1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

                      What’s behind you doesn’t matter.Enzo Ferrari

                      Comment


                      • #12
                        Originally posted by Scott Danforth View Post

                        look outside your area.

                        I picked up a motor in Missouri a few years back and I live in FL because it was a good deal. dont be afraid to spend $300 on gas to save $1500 or more
                        Solid advice. I found a couple i like within driving range, but they are from the 70's. Idk can old evinrudes be considered reliable?


                        i should have specified earlier : i only want johnson/evinrude for many reasons

                        Comment


                        • #13
                          Originally posted by tramsdell View Post

                          Thats the thing, there's not the cash flow this year to get a tnt injected motor... theres other needs in the budget rn alot of one time stuff that wont be there next season. And doing nothing isn't an option because the 30hp that came with this boat is inadequate to the point of being a safety concern.
                          So you are talking an injected OMC, in what price range? Or am I missing/misunderstanding?

                          70's stuff is getting pretty old, and part supplies are drying up for them. Carbed engines, once sorted out, usually stay that way as long as you're willing to take care of them, and are MUCH less expensive to work on as a rule, as many owners can do their own work. Not so much with the fuelies....

                          For what you want to do I would be shopping for an 85, 88, or 90 hp. They're pretty much all the same engine. As long as you don't need it for a trip you're leaving on tomorrow, you should have plenty of time to track one of those down that will suit your purposes. Even with tnt, something pretty decent should be no more than 1500 tops.

                          Comment


                          • #14
                            Originally posted by ahicks View Post

                            So you are talking an injected OMC, in what price range? Or am I missing/misunderstanding?

                            70's stuff is getting pretty old, and part supplies are drying up for them. Carbed engines, once sorted out, usually stay that way as long as you're willing to take care of them, and are MUCH less expensive to work on as a rule, as many owners can do their own work. Not so much with the fuelies....

                            For what you want to do I would be shopping for an 85, 88, or 90 hp. They're pretty much all the same engine. As long as you don't need it for a trip you're leaving on tomorrow, you should have plenty of time to track one of those down that will suit your purposes. Even with tnt, something pretty decent should be no more than 1500 tops.
                            OMC ficht or brp injection would be nice i have had carbed engines forever and it just seams like less maintenance to have injection. Maybe not? I'm concerned about the older stuff because thinks like lower units are getting harder to find parts for. Maybe its because im out of season but there's nothing on rhe market rn from the 90s, i wouldnt mind a v4 from the 90s, in fact it would be ideal. But where are they all?



                            i found a 77 evinrude v4 135hp ptt for 800bux, which seems nice but its over 40 years old!

                            Comment


                            • #15
                              Sign up today
                              Something like this is what i want(even tho its carbs), but this is about the average price im seeing and what leads to my budget restriction:
                              2003 Johnson 90 hp carbureted 20" v4 engine outboard boat motor. Compression is good on all four cylinders. Actual hours are not known. Prop is included. Pickup once check is cleared or verified. | eBay!

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