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Custom/Hybrid Melmack's very unique 300sx build
- Thread starter Melmack
- Start date
- Location
- SoCal
quick question and i don't me to hi jack your thread I was just given a solas 10 16 prop for the stock pump in my 300. Would this be wort the effort to install? I 'm just trying to get more little bottom acceleration out of the ski and I don't have a understanding for prop pitches yet.
Melmack
(Timothy)
- Location
- New Braunfels, TX
I'm reporting you 
If you can successfully remove the old prop and get that prop in there, it should help out a ton. People have had decent success with the 440 pump but from what I've seen, the hardest part is removing the old prop. If that is a true 10/16 440 prop, I want to see picks. It sounds wicked since the lowest pitch I found anywhere was a straight 15. The 440 pump allows more volume of water than the FX-1 so if you can make it work, go for it. Feel free to post up your pics here.
If you can successfully remove the old prop and get that prop in there, it should help out a ton. People have had decent success with the 440 pump but from what I've seen, the hardest part is removing the old prop. If that is a true 10/16 440 prop, I want to see picks. It sounds wicked since the lowest pitch I found anywhere was a straight 15. The 440 pump allows more volume of water than the FX-1 so if you can make it work, go for it. Feel free to post up your pics here.
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Melmack
(Timothy)
- Location
- New Braunfels, TX
BTW, got a little gift at my doorstep today. Now All I need is a little tuning and I'm ready for the surf!!!
One is just a spare:
Here's a mock up:
One is just a spare:
Here's a mock up:
- Location
- SoCal
Thanks for the info friend of mine has been building ski's since the 70's and he said he's got some specialty tolls for removing 440 pumps. The prop says kc 10 16 on it I was told it was a solas but I'm not a expert so maybe I'm missing something. As far as the pump I have have had people tell me that its total garbage and a few say its good. I have a ported 650 motor mariner head factory pipe and a sbn 44 I plan on swapping in along with a x2 pump. But I will probably do the motor to the stock pump first just to see how bad it is.
Melmack
(Timothy)
- Location
- New Braunfels, TX
That may not be too bad. You may try the motor wit whatever prop is in there first. These small pumps tend to like taller props with that kind of HP. FX-1s have the smallest pump of any large motor ski. They use pitches in the 20's. A 650 is a beast isf set up right. So it probably makes 70+ hp. Just some things to think about. BTW, I looked at the 650 pump myself. with a little modification, It looks like you can get it in there pretty easily. I may eventually try it on a second hull. I have a killer mod 650 wit ha great pump and prop. This thing would be doing backies no prob with that setup.
Melmack
(Timothy)
- Location
- New Braunfels, TX
Took the ski to the waves this weekend. Still need to work on the pop off and jetting but much closer. However, it managed well in some very choppy Texas surf. Was still running more than 1/2 choke due to too high pop off but once it cleared out it was fun. I have a video of Tim from the Austin crew. First impression for me and him was the pole is waaaaaaay to long for surf and it rides to nose high. I understand the short pole on the BOBs now. I'm going to get to work on shortining the pole. Also, this further prompts me to work on the extended ride plate for surf. I invision a plate something like the old Seadoo XPs had. This plate could be stock length or be 3-4 inches longer along the entire back depending on which of two extended plates you run. Plus you could remove it all together and it would act like a steppe hull and give you more nose lift like a d cut plate. This would ad minimal weight and make the ski completely versatile for flat and surf. Look for a video post later today.
Tyler Zane
Open Your Eyes
- Location
- Panama City Beach, FL
man i dont know how i have missed this build but i just read it from page one and am very curious about this new engine and hull you speak of. i enjoined it and will be following along from now on.
AZRIDER
stupid desert
- Location
- TUCSON ARIZONA
lol yah just found it myself(and read the whole thread too)....... interesting Its not one of those new A-symetrical-low oil 2-stroke pretending to be environmentally friendly like a 4 stroke motor thats goin in that in the future is it ? I know it not electric thats still not light enough....
Melmack
(Timothy)
- Location
- New Braunfels, TX
LMAO, no its a Tesla powered electric motor. You set up your coil on shore and you can ride all day. J/K.
Seriously though, I'm trying to keep it somewhat under wraps right now until I get some sort of licensing. That way, if the manufacturers like it, I get a little something for my efforts. Right now, I have no rights to the motor. It's just a repoposed engine from a generator application.
Seriously though, I'm trying to keep it somewhat under wraps right now until I get some sort of licensing. That way, if the manufacturers like it, I get a little something for my efforts. Right now, I have no rights to the motor. It's just a repoposed engine from a generator application.
Melmack
(Timothy)
- Location
- New Braunfels, TX
Sorry but I wont have much on that until the end of summer when they deliver the prototype. I may be able to let the cat out of the bag sooner but only if they deliver my engine sooner. Once I can prove it works, I'll let everyone in on what this engine is. Until then, I will continue experiencing with the drive line and currently available engines to fine tune handling and propoltion.
Melmack
(Timothy)
- Location
- New Braunfels, TX
LOL. Well, I understand the frustration. I wish I could say more. But, at least theres some serious interest here. I will post up picks and video from the Free ride this weekend. If you happen to be comming to LSFR, please stop by and look at what I have done so far. As long as this thing hlds up, you are welconme to take it for a test ride. Who knows, I might even let you in on some inside info. As long as you can keep it to yourself. :shhh:
Melmack
(Timothy)
- Location
- New Braunfels, TX
The 300 will be at mud cove/ lake Travis all afternoon tomorrow. Please come ride it in its small motor form. You'll be surprised how well it runs for a 300. I need feedback. I have installed a foot strap and limiting rope so I plan on rolling it of some wakes if my bum knee holds up. Come see what this hybrid 300 can do!
Also, I'm working on a 550 reed motor to use as the 70hp model prototype until the new engine arrives. This will be a highly modified 550. This is to test the ski with considerably more hp but about the same weight as with the 300 motor. So far the pump has held up fine. I will be changing to a regular fx-1 prop for the 70hp motor
One more interesting thing: I have been thinking about a setup that would easily convert any stand up into a fixed steer ski. Well, I found something that made it too easy so, I built it and will be showing it off at mud cove tomorrow as well. This is a cool setup. I can convert from a stand up to a solid fixed steer in literally seconds. I haven't water tested it yet but I'm confident It will work on any ski. If you have a limiting rope or a place to hook towards the back of the hood, you are welcome to try it out. I may be selling these kits or posting a how to thread shortly.
Also, I'm working on a 550 reed motor to use as the 70hp model prototype until the new engine arrives. This will be a highly modified 550. This is to test the ski with considerably more hp but about the same weight as with the 300 motor. So far the pump has held up fine. I will be changing to a regular fx-1 prop for the 70hp motor
One more interesting thing: I have been thinking about a setup that would easily convert any stand up into a fixed steer ski. Well, I found something that made it too easy so, I built it and will be showing it off at mud cove tomorrow as well. This is a cool setup. I can convert from a stand up to a solid fixed steer in literally seconds. I haven't water tested it yet but I'm confident It will work on any ski. If you have a limiting rope or a place to hook towards the back of the hood, you are welcome to try it out. I may be selling these kits or posting a how to thread shortly.
Melmack
(Timothy)
- Location
- New Braunfels, TX
That was a fun ride. I've finally dialed in the 300 carb to about 98% correct. Nothings burning up so I'm not touching it for now. I had some really good feedback this weekend about the ski. I shared some things about the design and got a few Ideas about what our hull should be like if this motor works out. I might be trying a different prop and then maybe a 144 pump. My feeling so far is that even this 300 motor is too powerful for the custom prop in the fx-1 pump. It may be that it was cut a little too small and has too much clearance. Ither way, it seems the prop could be much closer to the FX-1 oem pitch in the low 20s.
Schmidty721
someone turf my rails
- Location
- WI
What kind of regulations do you have to meet to produce an emissions legal pwc as a small volume manufacter? I'm familair with regulations for on and off highway motorcycles, atv, utility vehicles, etc. but never looked into PWC regulations. I'd be interested to know if you have a copy of the regs or a link to that info.
Melmack
(Timothy)
- Location
- New Braunfels, TX
It is state to state but basically, you have to meet all EPA and CARB regulations to be 50 state legal. I wouldn't be interested in just a 48 state legal ski. This motor already meets all the regs in its current form. Once we adapt it for this particular use, we will have to go through a very expensive testing and certification process for the entire vehicle, not just the engine. In the case of building a complete vehicle, its not like it is with DASA engines or some small manufacturer. It has to meet the same regs as any large scale production company like Yamaha. I plan on pumping out one ski a week. So, 50 per year once we get every thing set up and running smoothly. That's 1/4 of what yamah and Kawi did. But it's doable with all the numbers I've run. First things first though, I need this motor delivered so I can get the prototype and convince investors its a workable idea.
You can find all the info ion C.A.R.B and EPA sites. The new laws take effect 1/1/2012 so never mind whats up there now.
BTW Schmidty, you got Derricks dad's Bob. Sweet! I had dibs but was broke. If you ever sell it, please give me a heads up first. Thats the sweetest ski Ive ever seen!
You can find all the info ion C.A.R.B and EPA sites. The new laws take effect 1/1/2012 so never mind whats up there now.
BTW Schmidty, you got Derricks dad's Bob. Sweet! I had dibs but was broke. If you ever sell it, please give me a heads up first. Thats the sweetest ski Ive ever seen!
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Schmidty721
someone turf my rails
- Location
- WI
I’m glad to see that you’ve done your research and are aware the certifying a vehicle is an expensive and time consuming endeavor. I’m an Emissions Engineer at S&S Cycle. We have a full service EPA & CARB recognized testing facility where we test and certify our products as well as offer testing and consulting to outside companies. We’re capable of testing any motorcycle, atv, utv, scooter, etc. under 2200 lbs curb weight. When I get time I'll search out the PWC regs just because I’m curious, unless you have a link to the CFR section? I hate navigating EPA and CARB websites!
Here’s a little video that Wally Cahill and his team put together on our lab. I'm the dude riding the bike, Jan, who is speaking, is my boss and handles most of the cert paperwork.
http://www.youtube.com/watch?v=SFFKgkKpbnU&feature=player_embedded#at=97
Here’s a little video that Wally Cahill and his team put together on our lab. I'm the dude riding the bike, Jan, who is speaking, is my boss and handles most of the cert paperwork.
http://www.youtube.com/watch?v=SFFKgkKpbnU&feature=player_embedded#at=97
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Melmack
(Timothy)
- Location
- New Braunfels, TX
Good stuff. Thanks. I have had a hard time finding a PWC testing facility. Motorcycles are one thing. But we are far from that stage at this point. Luckily, our motors are likely to be fuel injected. This will make tuning for EPA much easier. Thanks for the info. Let me know if you find anything on watercraft.