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Intex Mariner 4 modifications and Tips

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  • Good morning all. After reading through about the first 50 pages of this topic I figured I would try posting what I am working on. I am building a rowing frame out of 1" emt, conduit. It consists of 2 rectangles with one about 10" narrower in length and width. The outer one has a saddle on both sides which curves up around the oar locks and both the inner and outer rectangle are kicked up about 3" in the front and rear to raise the seats up a little more. Taller oar locks will be added once the main frame is complete along with rod/cup holders and whatever else I think of. I am also planning on building a motor mount that would be removable that would attach to the frame for rigidity but would also push on the rear of the boat without being pulled down like the factory mount. Going out to do some welding so I will get some pics of the two main frames before I start.

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      • I picked up a like new 2000 Johnson 2 hp last night for $125. I have known the seller for about 20 years, who bought it at an estate about 5 years ago only to put it in a corner of his shop and leave it there until I picked it up. Fresh gas and about 8 pulls later it fired right up but the tell tale never pumped out any water. This particular impeller was only used in about 75 million small outboards so of course it is no longer available. I pulled it out of the low end and saw that one of the blades was actually bent back the opposite direction of the others so I installed it backwards and bent the blades to the new correct direction and low and behold it pumps just fine. Now I get to build a motor mount that will attach to my rowing frame.

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        • Just unboxed my Mariner 3: first steps?

          Hey all, I'm in a hurry to get on the water on my M3. No motor yet, I will mostly use it in small (not more than 1.5 miles diameter) ponds for fishing. VERY laid-back fishing alone: a perfect fishing day is when not even fish interrupt your train of thoughts.

          I inflated it indoors and tried a couple of things: when I inflated the keel, the slatted floor domed up over it. Then when I stood on the floor, the slats bent down under my 215 lbs. Also, the inflatable seats, even standing on their sides are too low.

          Here's my plan with questions:
          - I'll do the wood floor, but I have limited trunk space for everything, so I'll do it in sections: should I worry a lot about making it overly rigid or I can just have the sections placed on top of the factory floor without bolting them together? Can I make it around 6 ft long to cover only the middle section leaving the triangular ends uncovered (think the last two slats visible)?
          - If I wanted to overdo it with thick wood and some connecting hardware (thinking about H shaped connectors between the boards), can I get rid of the factory floor so that I move less equipment in my puny car?
          - It will take me some time to make the floor, so in the mean time can I replace the plastic slats with 5/8" or 3/4" plywood for a little higher rigidity while I test it? Well, of course I can, but would I be able to stand more/better on these better slats? Not to the point of doing jumping jacks, but just stand and cast my rods?
          - In terms of seats I will just place two boards over the tubes dividing the space in thirds so I can row from any of them. Maybe I'll add some storage below, or a T support in the middle and stadium seats for *some* back support.

          That's most of it. I have a 3lb anchor, PFD, lots of paracord and electric inflator. I could add some sort of shelf over the bow or stern for tackle boxes and a cooler somewhere, but my ambitions are somewhat low until I experience it in a couple of outings. I KNOW I'll buy a Minn Kota motor before New Year's Eve.

          What do you think? Caveats? Thanks!

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          • QUOTE FROM HIREDGOON

            I picked up a like new 2000 Johnson 2 hp last night for $125. I have known the seller for about 20 years, who bought it at an estate about 5 years ago only to put it in a corner of his shop and leave it there until I picked it up. Fresh gas and about 8 pulls later it fired right up but the tell tale never pumped out any water. This particular impeller was only used in about 75 million small outboards so of course it is no longer available. I pulled it out of the low end and saw that one of the blades was actually bent back the opposite direction of the others so I installed it backwards and bent the blades to the new correct direction and low and behold it pumps just fine. Now I get to build a motor mount that will attach to my rowing frame.


            I have been using a 2 HP Johnson on my MARINER $ for the last 3 years. It does a creditable job of pushing the boat. Hope you have good luck with yours.

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            • Well, when I posted my question, I was only in page 12-15 of this monster thread. Now I've reached page 74 and have a lot more information.

              I just got the M3 on a small pond, now I can report back on my experiment.

              I replaced the floor slats with pine boards from some pallets and it was great!

              I can stand facing forward or sideways to cast around the boat. It's not walkable, but you can adjust your position without much fear of getting fully wet. I didn't weigh before and after, but I'd bet it's lighter than the extruded plastic.

              It's somewhat difficult to row standing up, to adjust positions etc. but I totally see me fishing standing up with some clever anchoring.

              The rest is pretty vanilla, I wanted to test it first prior to buying more stuff and embarking on further projects.

              Some pictures follow.

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              • Originally posted by Jiggyjay View Post
                Been awhile since posted.. looks like this thread is still chugging a long. Boating season almost done in N.America. wanted to share some videos of my M4 mods.

                Here is my 2 motor setup. Have an electric motor up front and gas motor on the back.

                https://youtu.be/QNtuFakrc2E

                Going over my new mods

                https://youtu.be/lfrdyqt0YeM

                Comparison video between M4 and E5.

                https://youtu.be/33Vn60z_BpI
                Jiggyjay Not sure if you check in here any longer, but I have a few questions just in case you do.

                I'm going to be getting a Mariner 4 next spring and am planning mods. I really like the idea of your frame and the way your seats and rod holders attach. Do you ever take yours apart and reinstall? If so how long does it take? About how long are the boards for the seats and the poles on the sides. I'd want to make sure they'd fit in my vehicle easily

                I like the idea of the 2 motor setup. Have you found anywhere that sells the attachments for the motor mount that can be purchased without getting a whole other boat?

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                • Sign up today
                  Well my Mariner 4 adventure is over before it even started. I found a good deal on a used Hydro-Force Sunsaille. It's a 12.5 ft Inflatable with aluminum floor and wooden transom. It was purchased new at Costco last year and was only used twice. I got it for about how much it would have cost me to purchase and modify a Mariner 4 and I don't have to do all the work of modifying. I'll still have to add some swivel seats on the benches if I choose, but there's no rush for that.

                  For anyone considering a Mariner 4 these Hydro-Force boats can be had at Costco for less than 2x the price of a Mariner 4 and will give you the peace of mind of Costco's return policy and will require no mods.

                  Now I have to wait a few months for fishing season.

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