Will she perform?

[Rdtolbert]

Today I picked up the boat for my 30 horse Johnson jet. I am not sure what it is exactly, but it is a riveted polarkraft. It measures 14 feet from bow to stern, 44 inches at the bottom of the transom, and 5 feet at the top of the transom.(will post pics in the am) any ideas. I run in shallow sandy rivers. I carry 1 passenger (200 pounder) and about 150 pounds of gear. Will this boat get it done, in 4 to 5 inches of sandy bottom water?

 

[dhoganjr]

If that is 30 at the pump it should do fine as long as the setup is correct. Probably run in the low 20's. You'll also probably have to play with the weight distribution to help it plane out quicker.

 

[Rdtolbert]

30 at the power head, 20 at the nozzle.

 

[Rdtolbert]

Here is the boat, need to replace the floor and fabricate a transom riser. Wanting to remove the center seat as well, think this will compromise the hull integrity?

 

[airbornemike]

I just had a 2004 30hp johnson jet installed on my skiff, I'll post up my water test when its done.

 

[dhoganjr]

With 20 at the pump, I think the boat is wide enough that it should plane, but will take a bit longer. Weight dist. and setup will be key. Keep your impeller dressed and shimmed correctly. It will probably plow water on takeoff so give yourself plenty of time to get on plane before the shallows or you'll be plowing a trench through rocks and sand. It will run wide open most of the time to keep on plane and in sharp turns it will drop speed quick setting down in the water. Try to keep weight down as much as possible. Get the height set correctly, use a straight edge on the bottom of the hull to the shoe, (ruler, board, or whatever you have handy). Usually the pumps leading edge can set just above that line, in between the edge and where the grates start. You don't want the pump dragging water cause that will kill any performance your going to get.

Don't know if you already know all this, but if you don't hope it helps. It's not going to be fast but it will get you up and down the river. Should run in about 5-6" of water if you give it time to plane out.

As far as the boat, hopefully someone else can answer that.

Have any more questions just ask.

 

[Rdtolbert]

With 20 at the pump, I think the boat is wide enough that it should plane, but will take a bit longer. Weight dist. and setup will be key. Keep your impeller dressed and shimmed correctly. It will probably plow water on takeoff so give yourself plenty of time to get on plane before the shallows or you'll be plowing a trench through rocks and sand. It will run wide open most of the time to keep on plane and in sharp turns it will drop speed quick setting down in the water. Try to keep weight down as much as possible. Get the height set correctly, use a straight edge on the bottom of the hull to the shoe, (ruler, board, or whatever you have handy). Usually the pumps leading edge can set just above that line, in between the edge and where the grates start. You don't want the pump dragging water cause that will kill any performance your going to get.

Don't know if you already know all this, but if you don't hope it helps. It's not going to be fast but it will get you up and down the river. Should run in about 5-6" of water if you give it time to plane out.

As far as the boat, hopefully someone else can answer that.

Have any more questions just ask.

Wow, thanks for the good info. I messed up and bought this motor before reading much about them. When I am ready to upgrade, I will be getting a 90/60 on a 16 foot boat.

Found out today that the boat is a 1979 1451 polarcraft. However, I don't know what model it is or how to find out. Nada guides says it could be; a cf1451, a cgs1451, or a s1452. Anyone have any idea what cf, cgs, and s means?

 

[airbornemike]

Mechanic water tested her this morning, 26mph with himself and 3gal of gas. I'm running real light, my hull is 16'x51" @ 200lb

airbornemike » Yesterday, 11:54[/url]"]I just had a 2004 30hp johnson jet installed on my skiff, I'll post up my water test when its done.

 

[mphelle]

airbornemike » 52 minutes ago[/url]"]Mechanic water tested her this morning, 26mph with himself and 3gal of gas. I'm running real light, my hull is 16'x51" @ 200lb

airbornemike » Yesterday, 11:54[/url]"]I just had a 2004 30hp johnson jet installed on my skiff, I'll post up my water test when its done.

That's about what I was getting on a 1648, great little rig. Be sure to start your own topic when you get some pictures.

 

[Rdtolbert]

My hull is 200 pounds as well, going to try and it under 300 total. Hopefully I can carry a passenger with no problems.

 

[dhoganjr]

Rdtolbert » 29 Apr 2014, 13:46[/url]"]My hull is 200 pounds as well, going to try and it under 300 total. Hopefully I can carry a passenger with no problems.

It should do it. You have it figured out, keep the weight down and get the setup correct and you'll be fine.

 

[dhoganjr]

airbornemike » 29 Apr 2014, 11:48[/url]"]Mechanic water tested her this morning, 26mph with himself and 3gal of gas. I'm running real light, my hull is 16'x51" @ 200lb

airbornemike » Yesterday, 11:54[/url]"]I just had a 2004 30hp johnson jet installed on my skiff, I'll post up my water test when its done.

Just curious is that is 30 at the pump?

 

[Rdtolbert]

No sir, 30 at the power head. The maximum hp for this boat is 20, so I am right there at 21 or so. I wanted a boat that would run skinny, but light enough to drag up and down a steep riverbank.

 

[dhoganjr]

Rdtolbert » 29 Apr 2014, 23:38[/url]"]No sir, 30 at the power head. The maximum hp for this boat is 20, so I am right there at 21 or so. I wanted a boat that would run skinny, but light enough to drag up and down a steep riverbank.

I was asking about airbornemike's 30 hp jet. Was wondering if his was 30 at the pump. Outboard jets built and sold by mfg companies now are rated at the pump, so a 30 jet would be a 40/30. I don't remember the years they started rating them that way. Previous outboards and ones built now that had the jet added later are rated at the powerhead, so that 30 would be a 30/20 give or take.

Just checking to see if both are in the same hp class. If his is a 30 and yours is a 20, I wanted to make sure you didn't get it built and run it, and then think something is wrong if it doesn't perform similarly.

 

[airbornemike]

Mine is a Johnson 2004 30hp at the head 20hp at the pump.

dhoganjr » Yesterday, 23:51[/url]"]

Rdtolbert » 29 Apr 2014, 23:38[/url]"]No sir, 30 at the power head. The maximum hp for this boat is 20, so I am right there at 21 or so. I wanted a boat that would run skinny, but light enough to drag up and down a steep riverbank.

I was asking about airbornemike's 30 hp jet. Was wondering if his was 30 at the pump. Outboard jets built and sold by mfg companies now are rated at the pump, so a 30 jet would be a 40/30. I don't remember the years they started rating them that way. Previous outboards and ones built now that had the jet added later are rated at the powerhead, so that 30 would be a 30/20 give or take.

Just checking to see if both are in the same hp class. If his is a 30 and yours is a 20, I wanted to make sure you didn't get it built and run it, and then think something is wrong if it doesn't perform similarly.

 

[Rdtolbert]

Rdtolbert » 29 Apr 2014, 23:38[/url]"]No sir, 30 at the power head. The maximum hp for this boat is 20, so I am right there at 21 or so. I wanted a boat that would run skinny, but light enough to drag up and down a steep riverbank.

I was asking about airbornemike's 30 hp jet. Was wondering if his was 30 at the pump. Outboard jets built and sold by mfg companies now are rated at the pump, so a 30 jet would be a 40/30. I don't remember the years they started rating them that way. Previous outboards and ones built now that had the jet added later are rated at the powerhead, so that 30 would be a 30/20 give or take.

Just checking to see if both are in the same hp class. If his is a 30 and yours is a 20, I wanted to make sure you didn't get it built and run it, and then think something is wrong if it doesn't perform similarly.

Sorry, I replied from my phone, before I saw that you quoted from a different post.

 

[Rdtolbert]

Took this boat out on my river for the first time Saturday. Performed like a dream.

https://youtu.be/cHyqf7Duz2M

 

[airbornemike]

Ain't it a blast, my passengers regularly cringe

 

[jhunter1]

Took this boat out on my river for the first time Saturday. Performed like a dream.

https://youtu.be/cHyqf7Duz2M

Looked like you guys had a blast

 

[Rdtolbert]

Took this boat out on my river for the first time Saturday. Performed like a dream.

https://youtu.be/cHyqf7Duz2M

Looked like you guys had a blast

We had a great time. This was simply a test run, to get a better idea of how I wanted to lay the boat out. I learned two things, I must have a tunnel installed, and sitting down to run the tiller, is not an option.