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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 18 Oct 2016, 08:30 

Joined: 13 Oct 2015, 14:13
Posts: 92
badrider77 wrote:
That is some beautiful work! Great job!!


Thanks man, I seconded what CedarRiverScooter said in his last post. You want to try and make the transition from the jon boat hull to the ski hull as smooth as possible. I try and leave about 10 to 12 inches of the actual ski hull in front of the pump exposed so that the transition happens far enough in front of the pump that it will not cause any disruption of water flow plus I add bondo and fiberglass and sand the hell out of it to make it smooth. I think if you fill that step in with bondo and smooth it all down it will cut out most of the cavitation.


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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 21 Oct 2016, 18:24 

Joined: 17 Aug 2016, 20:52
Posts: 350
Location: NJ
Got any numbers on this, Top speed, fuel burn at WOT and cruise?


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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 22 Oct 2016, 17:13 

Joined: 13 Nov 2014, 08:01
Posts: 737
Sorry, missed this story until now. Kudos on the speed build!

You're gonna get asked about it at every boat ramp you go to.

The adjustable seating is a great idea, as well as the fwd fuel tank.

How much gas do you burn per hour? I am running about 7 gals per hour (750CC) but keep the hammer most of the way down.


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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 24 Oct 2016, 08:49 

Joined: 13 Oct 2015, 14:13
Posts: 92
Hey guys, here's a little update on the performance. Everything is running great, she seems to be the most happy cruising 35 mph. and at that speed the motor doesn't seem to be working hard at all. I am a little disappointed in the top speed though. Right at 46 is all she will pull. I feel there is a lot of drag on the hull. I used a roll on bed liner that has a really rough surface. I was more concerned with sealing rivets than speed. I bet if I had put something like Gator Glide on there it would be a little faster but its fast enough. As far as fuel burn, I haven't really run it enough to get an accurate number. I'm still in the break in stage with the new top end on the motor. Attached below is a pic of all three Jon's that I have built in the past year. This was from last weekend.


IMG_20161024_083540.jpg
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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 24 Oct 2016, 20:36 

Joined: 13 Nov 2014, 08:01
Posts: 737
They keep getting bigger! Are you going to sell the older one's? Just wondering how hard they are to sell.

46 MPH seems pretty fast in a 16 ft jon boat.

I was out yesterday, probably doing 30, when a strong wind gust changed my course. I think 50+ mph would be risky for getting air under the boat at the wrong time.


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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 25 Oct 2016, 08:11 

Joined: 13 Oct 2015, 14:13
Posts: 92
CedarRiverScooter wrote:
They keep getting bigger! Are you going to sell the older one's? Just wondering how hard they are to sell.

46 MPH seems pretty fast in a 16 ft jon boat.

I was out yesterday, probably doing 30, when a strong wind gust changed my course. I think 50+ mph would be risky for getting air under the boat at the wrong time.


As far as the other Jon's go, the smaller one was my first build and it was mine. I sold it to a buddy of mine who was chomping at the bit to get it. The one in the middle I actually built for a guy. It was never mine to start with. They do sell well around here, It really depends on the builder and the quality as to how much they bring.

My boat being a 16' with the 4' bottom is really stable and the fact that I used treated wood to build my floors and sub structuring made it weigh in a little on the heavy side. That to can be a contributor to the speed reduction. But you are correct, 46mph is plenty fast, I will probably never run it over 40 anyway but it is nice knowing I got the extra power.


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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 25 Oct 2016, 18:21 

Joined: 13 Nov 2014, 08:01
Posts: 737
The extra power will come in handy when you take friends for a ride!


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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 06 Mar 2017, 21:38 

Joined: 13 Oct 2015, 14:13
Posts: 92
https://youtu.be/AaMdOYkMT0A

Short clip from the river this past weekend.


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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 06 Mar 2017, 21:51 

Joined: 17 Aug 2016, 20:52
Posts: 350
Location: NJ
I didn't read every post in this thread and am not sure why other then a leak in the rivets you didn't leave the original aluminum bottom but that hull does sound like it's adding tons of drag IMO. The ski it came out of (if my numbers are right) ran 53+ and it a god amount heavier then your jon, granted you have more hull touching for drag (wider).

Either way she's a nice looking boat and as mentioned anything above 40 in a light boat can get tricky with wind and a wave or two.

Enjoy and run hard!


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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 07 Mar 2017, 09:24 

Joined: 13 Oct 2015, 14:13
Posts: 92
Hers's the skinny Crazyboat, I used to be apart of a jetski race team way back in the day. I have been around these skis my entire life. I have built many jet jon's to date as well. The ski that I used to build this jon (2000 Kawasaki ultra 150) was the fastest production 2stroke PWC of its time. Its a true 65, 66 mph ski in stock form. Don't know where your numbers of 53mph are coming from. I actually own another Ultra 150 that I can confirm those numbers plus if you google Ultra 150's those mph numbers are all over the net. Also the ultra's weight comes in around 600lbs and my boat is weighing in at 790 when we rolled it over the scales a couple of months ago. So yes, I have more drag (regardless if the hull is bare or painted) and yes it does weigh more. So, After it's all said and done, mid to upper 40's is actually quite well. The main reason for painting is I had to patch so many rivets that already had stress cracks running from them, plus patch large holes that had been punctured in the bottom. That boat had been abused by the previous owner and I was left with alot of work needles to say. So, I wanted to cover all the ugliness up because I was painting the whole boat. People always are surprised when I tell them that at wide open speeds in the boat is just as stable as if it was at 15mph. I had a 14/32 jon with an 80hp waveraider engine in it that would hit 43, and it was super smooth and stable. But the objective of building these boats with greater horsepower isn't for the top speed, it's so the the cruise speed can be moderate at lower rpm and also to be able to carry gear and passenger's with out the engine struggling all the time.




Crazyboat wrote:
I didn't read every post in this thread and am not sure why other then a leak in the rivets you didn't leave the original aluminum bottom but that hull does sound like it's adding tons of drag IMO. The ski it came out of (if my numbers are right) ran 53+ and it a god amount heavier then your jon, granted you have more hull touching for drag (wider).

Either way she's a nice looking boat and as mentioned anything above 40 in a light boat can get tricky with wind and a wave or two.

Enjoy and run hard!


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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 07 Mar 2017, 16:39 

Joined: 17 Aug 2016, 20:52
Posts: 350
Location: NJ
SC Designs wrote:
Hers's the skinny Crazyboat, I used to be apart of a jetski race team way back in the day. I have been around these skis my entire life. I have built many jet jon's to date as well. The ski that I used to build this jon (2000 Kawasaki ultra 150) was the fastest production 2stroke PWC of its time. Its a true 65, 66 mph ski in stock form. Don't know where your numbers of 53mph are coming from. I actually own another Ultra 150 that I can confirm those numbers plus if you google Ultra 150's those mph numbers are all over the net. Also the ultra's weight comes in around 600lbs and my boat is weighing in at 790 when we rolled it over the scales a couple of months ago. So yes, I have more drag (regardless if the hull is bare or painted) and yes it does weigh more. So, After it's all said and done, mid to upper 40's is actually quite well. The main reason for painting is I had to patch so many rivets that already had stress cracks running from them, plus patch large holes that had been punctured in the bottom. That boat had been abused by the previous owner and I was left with alot of work needles to say. So, I wanted to cover all the ugliness up because I was painting the whole boat. People always are surprised when I tell them that at wide open speeds in the boat is just as stable as if it was at 15mph. I had a 14/32 jon with an 80hp waveraider engine in it that would hit 43, and it was super smooth and stable. But the objective of building these boats with greater horsepower isn't for the top speed, it's so the the cruise speed can be moderate at lower rpm and also to be able to carry gear and passenger's with out the engine struggling all the time.

Sorry, don't know where I got this from but for some reason I was thinking you had the engine from a Yamaha ski, the same model as a friend of mine had that topped out at 53 MPH on a GPS. So yes, my numbers would be wrong. Still if you got 65+ from a 150 HP engine that's pretty fast, many 250 HP ebgines ran stock at about 70 as I recall, no? (Yamaha/Seadoo)


Crazyboat wrote:
I didn't read every post in this thread and am not sure why other then a leak in the rivets you didn't leave the original aluminum bottom but that hull does sound like it's adding tons of drag IMO. The ski it came out of (if my numbers are right) ran 53+ and it a god amount heavier then your jon, granted you have more hull touching for drag (wider).

Either way she's a nice looking boat and as mentioned anything above 40 in a light boat can get tricky with wind and a wave or two.

Enjoy and run hard!


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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 07 Mar 2017, 17:58 

Joined: 13 Oct 2015, 14:13
Posts: 92
Crazyboat wrote:
SC Designs wrote:
Hers's the skinny Crazyboat, I used to be apart of a jetski race team way back in the day. I have been around these skis my entire life. I have built many jet jon's to date as well. The ski that I used to build this jon (2000 Kawasaki ultra 150) was the fastest production 2stroke PWC of its time. Its a true 65, 66 mph ski in stock form. Don't know where your numbers of 53mph are coming from. I actually own another Ultra 150 that I can confirm those numbers plus if you google Ultra 150's those mph numbers are all over the net. Also the ultra's weight comes in around 600lbs and my boat is weighing in at 790 when we rolled it over the scales a couple of months ago. So yes, I have more drag (regardless if the hull is bare or painted) and yes it does weigh more. So, After it's all said and done, mid to upper 40's is actually quite well. The main reason for painting is I had to patch so many rivets that already had stress cracks running from them, plus patch large holes that had been punctured in the bottom. That boat had been abused by the previous owner and I was left with alot of work needles to say. So, I wanted to cover all the ugliness up because I was painting the whole boat. People always are surprised when I tell them that at wide open speeds in the boat is just as stable as if it was at 15mph. I had a 14/32 jon with an 80hp waveraider engine in it that would hit 43, and it was super smooth and stable. But the objective of building these boats with greater horsepower isn't for the top speed, it's so the the cruise speed can be moderate at lower rpm and also to be able to carry gear and passenger's with out the engine struggling all the time.

Sorry, don't know where I got this from but for some reason I was thinking you had the engine from a Yamaha ski, the same model as a friend of mine had that topped out at 53 MPH on a GPS. So yes, my numbers would be wrong. Still if you got 65+ from a 150 HP engine that's pretty fast, many 250 HP ebgines ran stock at about 70 as I recall, no? (Yamaha/Seadoo)

You are correct about the 250 hp skis. But keep in mind that the federal government has a speed leash on the manufactures. Stock skis can't exceed 68mph from the factory. Now we all know that they are capable of much greater speeds with an aftermarket tune and so on. A good friend of mine has an 08 kawasaki ultra 250 (250hp) me on my Ultra 150 and him on his from a dead stop he blows the doors off of me out of the hole and I cant catch him but when we do a 30mph kick, we are handle bar to handle bar all the way to top end and over a half mile he may pull ahead one ski lenght. That's how impressive the older Ultra 150's were.


Crazyboat wrote:
I didn't read every post in this thread and am not sure why other then a leak in the rivets you didn't leave the original aluminum bottom but that hull does sound like it's adding tons of drag IMO. The ski it came out of (if my numbers are right) ran 53+ and it a god amount heavier then your jon, granted you have more hull touching for drag (wider).

Either way she's a nice looking boat and as mentioned anything above 40 in a light boat can get tricky with wind and a wave or two.

Enjoy and run hard!


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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 07 Mar 2017, 20:32 

Joined: 13 Nov 2014, 08:01
Posts: 737
SC - Thanks for sharing the video - I am getting itchy to get back out in the water. it hit 70 degF yesterday, way above normal.

Keep building those good looking boats!

Ever consider cutting into a new hull? Or building your own?


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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 07 Mar 2017, 21:27 

Joined: 13 Oct 2015, 14:13
Posts: 92
Building my own hull would be a new challenge, but I have to admit, I would need to really bring my welding skills to the next level..lol. I wouldn't hesitate to cut into a new hull if somebody would bring me one. I got three skis sitting at the shop now I got to find boats for. 2 Yamaha's and a sea Doo. Got a 50hp 650 Yamaha, an 80hp waveraider and a sea Doo GTS 3 seater with the small 580cc in it. The 80hp will be good for a decent size Jon but the others will need to be in small Jons. Either way, jetjon building will be continuing.




CedarRiverScooter wrote:
SC - Thanks for sharing the video - I am getting itchy to get back out in the water. it hit 70 degF yesterday, way above normal.

Keep building those good looking boats!

Ever consider cutting into a new hull? Or building your own?


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 Post subject: 16/48 Tracker w/ 145 HP
PostPosted: 16 Mar 2017, 09:18 
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Joined: 02 Jun 2015, 09:56
Posts: 476
Location: Bedford Indiana
CedarRiverScooter wrote:
SC - Thanks for sharing the video - I am getting itchy to get back out in the water. it hit 70 degF yesterday, way above normal.

Keep building those good looking boats!

Ever consider cutting into a new hull? Or building your own?



Nice work on the boats you really finish them out well. I was going to ask about the same thing. Since all your boats are riveted old clunkers to start with seems like you spend a awful lot of time money and effort just to bring the hull up to snuff when it's still always going to be a thin riveted hull, not the best for jet boat beating. Surprised you haven't started with welded hull of some kind so you have a better base from the get go. Not bashing your builds at all you clearly have it down to a science on these jet ski jons. Just seems like with how much time, money, and work you put in them starting with a better sturdier hull would be worth it. Would cost more up front vs riveted hulls that you can pick up for cheap, but seems like it would be worth it. Anyways nice work cool boats makes me want to build one, but I have too many projects already.


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