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PostPosted: 06 Feb 2019, 20:37 

Joined: 06 Feb 2019, 16:54
Posts: 2
Hello, first post here. I have some experience fabbing and welding on boats. I sold my jet boat years back and want to get a small one for fishing the local river. Has anyone had experience with a 25/20 2 stroke outboard jet on a 12’ John? Either a 40 or 36” wide Lowe riveted Jon? It would be for me to fish from. 12 V Trolling motor and light gear. I’m not totally new to jets and aluminum boats, but this configuration of small outboard and Jon boat I have not seen. The reason for the short Jon is because I want it to fit in my garage. Thanks!


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PostPosted: 07 Feb 2019, 20:17 

Joined: 17 Aug 2016, 20:52
Posts: 361
Location: NJ
Even though I don't think a 25 will give you a full 20 HP (I'm thinking more like 15-18) you still may be over powering that boat. Jon boats will be lots of fun in creeks and calm rivers as you will slip and slide around turns.

I have no personal time on a small jet like you mention, but I'd be careful if you plan on running up to WOT. Enjoy


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PostPosted: 07 Feb 2019, 21:43 

Joined: 06 Feb 2019, 16:54
Posts: 2
I agree, it’ll produce 16–18ish HP.


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PostPosted: 08 Feb 2019, 11:22 

Joined: 26 Oct 2013, 14:56
Posts: 582
Location: Ewing, NJ
There are a couple of smaller boats around here on the river with small jet outboards. With the current on the river, they have to run WOT to go upstream and it's loud and they are still really slow. So it would depend on where you plan on using it, a bigger river with decent current will probably be too much for it. And jet outboards use more gas so fighting current at WOT will go through gas even faster and you would want ear protection. It would probably be fine on small lakes, ponds or streams.



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2001 Lowe Roughneck 1652 VT with Merc 60/45 jet 2 stroke
1993 Jetcraft 13' sprint boat with Chevy ZZ3 350 engine and Hamilton 772 jet drive
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PostPosted: 17 Feb 2019, 14:40 
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Joined: 10 Oct 2013, 04:35
Posts: 338
Location: Arcadia, MO
You would be better off to get a 14ft and no less than 40in bottom. A 25/20 will push it, but will be underpowered and take a bit to plane out. Keep it as light as possible. Jets push the rear of the boat to the side in turns and will put the back corners under water in hard turns on a narrow boat. I had a 15ft riveted boat with a 36in bottom I built for my first jet with a 25/20 (more like 15 maybe 16 hp). It would plane with 2 guys after about 100 yards and was very unstable. Took around 8 in to run in and had water coming over the transom frequently.



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Dan
2003 1860 Alweld Flat Bottom
2014 Mercury 250 Pro XS Jet
2003 RiverCraft trailer
Retired from Riverlife-2002 Mercury 115 Fourstroke Jet
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