Intex Mariner 4 modifications and Tips

Extreme25

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Jul 1, 2020
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i plan on making a 2 piece floor for my m4 using sanded 3/4 plywood and not using the factory floor , just a slat for the edge of 2 boards to sit on in the middle just wondering are 2 sheets needed or it can be made out of 1 sheet ?

also are most people leaving it all flat or cutting groves in the ends bending and gluing it up to keep the contours of the lift at the front and back ?
 

fluffywhitedogs

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Jun 25, 2020
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I feel like I’ve just read War and Peace! It took a couple of weeks but I just finished reading this entire 138 page thread! And lol I’m still not sure what I want to do for a floor! Hoping to hear about the lightweight alibaba option posted recently...
ive had my M4 for a couple of weeks, 2 outings, and the floor is definitely something I’d like to improve on...
 

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Galtee

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Jul 5, 2020
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Can someone help me with my decision. I want to buy a mariner 3, but with only a 90 day warranty I'm very unsure. Are these dingys safe and durable. ? Also why is the recommended psi for inflation only 1.14. most dingys are 2..5-3 psi. ?
 

Galtee

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Jul 5, 2020
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Is the mariner a quality product. There are some reviews on line that say the dingy failed at the seams for no reason. ?
 

areilly777

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Jul 13, 2020
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baseline I actually had made my own oars to do just what your are talking about. I found the oarlocks were under immense torque and pressure, to the point that I worried about raft failure. If you increase the size of the oar, you dramatically increase the stress on the boat. I chose the "creek frame" style for transportation reasons, and it disperses the stress over eight contact points (three tie downs per side and the board with my 200 lbs on the tube) with substantially more contact area.

Do you have any photos of your frame/oar setup?
 

drabina

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Jun 12, 2020
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I have the Mariner 4 and 3HP short shaft Mercury 2-stroke engine on the Intex motor mount. The engine is fairly heavy (28lbs) but still within specs provided by Intex. The problem is that when I run at 1/2 throttle, the engine pushes onto the mount, propeller goes under the boat and transom is half way under water at a weird angle. This can't be good for drag and fuel efficiency.

How do you guys mount a gas engine on your Intex so the mount stays over the water level and the motor is angled properly? I was thinking of raising the engine on the mount but that would not help with the angle and transom going under water at speed.
 

SCWells72

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Jul 19, 2020
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Hi, folks. I just picked up a Mariner 4 as my third fishing inflatable. I also have a Sevylor Coleman Colorado two-person kayak and a Sea Eagle SUPCat10. I got the Mariner 4 to allow me to take my two kids and/or wife out fishing (or just puttering around) with me. I expect that the SUPCat10 will likely remain my primary solo fishing vehicle but what you all have done with the Mariner 3/4 is nothing short of amazing, so I may well be proven wrong!

I primarily fish the fresh water lakes, rivers, creeks, and ponds around Austin, TX, though I've also been spending a bit of time on the Texas Gulf coast lately. In fact, I'll be going there next week (Port O'Connor) and will be taking the Mariner 4 with me to get out into the bay.

Right now it's pretty much stock, though I've added the Intex transom mount so I can use my SUPCat's trolling motor, and I just ordered a few glue-on Scotty adapters so I can mount some of my rod holders and fish finder. I also figured out how to mount my cooler in a stable fashion pretty much right in the middle, so that provides some storage space for my tackle, drinks, snacks, etc.

Anyway, just wanted to say hello! I'm sure I'll chime in more as I spend more time with this new toy.
 

GabCH

Cadet
Joined
Aug 29, 2019
Messages
6
Hi guys,

Does someone know the inner dimensions of the Mariner 4?

Thanks in advance,
Gab
 

Piipz

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Joined
Jun 26, 2020
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I have the Mariner 4 and 3HP short shaft Mercury 2-stroke engine on the Intex motor mount. The engine is fairly heavy (28lbs) but still within specs provided by Intex. The problem is that when I run at 1/2 throttle, the engine pushes onto the mount, propeller goes under the boat and transom is half way under water at a weird angle. This can't be good for drag and fuel efficiency.

How do you guys mount a gas engine on your Intex so the mount stays over the water level and the motor is angled properly? I was thinking of raising the engine on the mount but that would not help with the angle and transom going under water at speed.

You clearly didn't read the whole 139 pages of this thread, which covers your questions multiple times. This is the biggest fault of this boat, otherwise its actually an ok boat. I also have an intex mount, but i plan to support it a little bit better, by using a plywood floor and connecting two extra rods to the mount. But will sell the boat on the winter and will get a Bush Crab 330 instead https://www.bushboats.com/product/crab/ (less room inside, 3 times the cost, but overall better quality and all the intex problems solved). But using the Intex for a while, i at least know now what kind of boat I want exactly.
 

Floatnlow

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Joined
Dec 8, 2020
Messages
2
I have the Mariner 4 and 3HP short shaft Mercury 2-stroke engine on the Intex motor mount. The engine is fairly heavy (28lbs) but still within specs provided by Intex. The problem is that when I run at 1/2 throttle, the engine pushes onto the mount, propeller goes under the boat and transom is half way under water at a weird angle. This can't be good for drag and fuel efficiency.

How do you guys mount a gas engine on your Intex so the mount stays over the water level and the motor is angled properly? I was thinking of raising the engine on the mount but that would not help with the angle and transom going under water at speed.
Let me tell you this; the problem is with the crappy, unadjustable motor mount not the boat. All you have to do is shorten the upper arms on the mount. I used zip ties and scrap wood. You could drill new holes at the proper spot to make it easily remove able. My motor is 2.5hp 37lb. Had the exact same problem as you. Now it’s totally solid. No more bouncey engine and no more propeller going under the boat even at 100% throttle. 47574CF2-686A-4F3F-8350-1EDD111B1DFB.jpeg
 

Sea Rider

Supreme Mariner
Joined
Sep 20, 2008
Messages
11,047
The issue with such cheap pool toys inflatables is that are made from thin pvc unsupported fabric that flexes too much compared to a fully supported pvc fabric found in more expensive traditional inflatables. Can't inflate them to a higher air pressure to achieve better rigidity or will risk blowing any seam out. My late Sevylor Caravelle K 86 went that way....

Although you can modify the upper motor mount to sit firmer and flex less, both lower motor mount's arms will still flex downward the round aft portion when the motor is at full throttle depending on the HP motor used.

In such case scenario better is to throtle just enough for the combo to ride prallel to the water surface at a lower speed than doing it at a much higher speed and lower motor mount flexing downward and consequently losing best prop thrust angle of attack.

Happy Boating
 

Floatnlow

Recruit
Joined
Dec 8, 2020
Messages
2
The issue with such cheap pool toys inflatables is that are made from thin pvc unsupported fabric that flexes too much compared to a fully supported pvc fabric found in more expensive traditional inflatables. Can't inflate them to a higher air pressure to achieve better rigidity or will risk blowing any seam out. My late Sevylor Caravelle K 86 went that way....

Although you can modify the upper motor mount to sit firmer and flex less, both lower motor mount's arms will still flex downward the round aft portion when the motor is at full throttle depending on the HP motor used.

In such case scenario better is to throtle just enough for the combo to ride prallel to the water surface at a lower speed than doing it at a much higher speed and lower motor mount flexing downward and consequently losing best prop thrust angle of attack.

Happy Boating
You should check out the mariner 4. It’s material is far superior to the pool toy type boats. I have a a Coleman/Seyvlor 3 man, hydroforce 3 man, 3 intex kayaks and the mariner 4. Hydroforce is the only one that comes close to the mariner 4 material. Also the Mariner 4 has a rock guard that the lower arms rest on. Mine is almost completely rigid at full power. I use a hand dolly to pull my boat the 2 blocks from my house to the water. The 37lb engine doesn’t bounce at all with the tilt lock on. Trust me just tack the slack out of those top arms and you have yourself a very high performing mini motor boat
 

mwsheffer

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Joined
Feb 20, 2021
Messages
1
does anyone know if i can use "Foam Board Insulation" as flooring for my Mariner 4 that does NOT have the original floorboard (i plan to use it just with the boat).

Thanks!
Hi All
Just joined. I have had a Mariner 4 the last 4 years. Works fine for me.
first thing is I ditched the floor and silly seats. Built a 2 part plywood floor then carpeted it. Used the pattern of the stock floor. Obviously can't be a one piece. Mine is one big piece with a smaller piece at the back that my battery sits on. Very stable boat and I am a big guy. I installed a front seat but at the back I sit on a cooler!! It fits perfectly across the beam and gives a ton of quickly accessed storage. I run my battery pack cord for my fishing out through the cooler drain plug. I think it is better than a swivel chair.
 
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