FX-1 Cavitation!!!!!!!!! Help!!!!

[FX-Rex]

how to do good glass work is a bit of tibal knowledge and a bit of trial and error. I suggest you see if your college offers any courses, go to the library and read a book or two, or research on the internet. Either way, your still going to need to practice.

A lot of your questions are pretty elementary but I don't think anyone can tell you step by step on how to do these mods. Most people just figure it out on their own with a little guidence-- asking questions along the way if they get stuck.

 

[95FX1]

this thread went in a different direction...

Good luck with the pump mod bro if ya try it

 

[yamaboy]

Yamanube,"F*ck trees i climb bouys.


F*CK LAND IM ON MY SUPERJET

 

[curt248]

95fx1. I'm going to going riding tomorrow. I'll see if I notice if I notice the difference by sealing up the crevices in the intake grate, pump to hull junction, and ride plate.

After rereading and researching more about this topic, I'm thinking I will probably have to take the pump out and apart, then put it back together with yamalube. Which number yamalube do you use? I think I have some 4 and 5 laying around.

Are there any tricks to taking the pump out? Does it just pull out easily after taking out the 4 bolts that hold it in and moving the hoses out of the way? Do I have to take the hoses off first?

I think I'll take the pump out tommorrow evening after riding to seal everything up like you did.

Thanks again for your help.

Curt

 

[95FX1]

4 bolts and pull it right out....be carefull of the shims in the back 2 bolt...metal shims....if ya have any...i have 2 on each side....and this was a super easy fix bro.....trust me....the only hard part is getting the bolts and washers back in....the 2 on the one side are tuff to get just perfect....
i used just clear silicone for my sealing.....
and whne i had everything just snugg.....i hit the pump a few time toward the front of the ski....just to make sure it was tight fit....

and i was out riding last weekend and and found after 2 rhs of riding i thought i had sucked someting up into the pump....it was running a lil bit rough...non pop in the bottom end....so i went to the dock and found 1 of my bolts was not tight any longer...was cavatating again.....opps

ill do it all over again just to be sure this weekend!!

marc

 

[tom21]

sorry for the threadjack 95fx1...

curt when I did the 144 conversion I had the motor out and the the ski upside down.

I cut and welded the feet back on where they need to be for the fx1, did the same for the nozzle so the siphon tube was on the correct side.

this is how to align the pump-install the pump, you need the pto( part that connects the motor coupler to the driveshaft splines.) out of the ski. now you will see the driveshaft in the inside of the hull. adjust left to right by moving the pump and up and down with the use of shims. once centered you can install the pto and there are shims for that too, measure with a square if you need to realign the pump or just shim the pto. ( to honest most are very close ). now all you have to do is install the motor leaving the rubber dampner out and use a small straight edge to get the pto fingers perfectly aligned with the use of shims at the mounts. done! wasn't that easy.

youdon't need the ski upside down- I only had it that way as I was converting the 144 pump and it was easier for me that way.

I did chamfer the pump shoe to the 144pump- of course to get the full effect you would want to redo the whole intake area. but we opted not to for now. only other things we did was had to grind down the ridplate to clear the pump and tweaked the steering to make a quicksteer. not quite as good as a sj but pretty damn close.

 

[95FX1]

^^ no prob bro!!

ur info is great read as i would love to get that 144 in my baby!!

 

[curt248]

Thanks for the great info Tom.

Are you saying that if you cut some material out of the legs on the superjet 144mm pump and reweld them at the proper height for the fx1, you won't have to carve out the hull and do glass work for the pump install portion? Will the superjet holes line up with the old fx1's (to attach the pump)?

Wow. That would be great.

How difficult is it to take out the stock pump shoe and put in the 144mm from the superjet? From what I have been able to gather from the forums here, it will take quite a bit of grinding. I'm not afraid to grind the hull out if the result is the big 144mm superjet shoe.

Does the shoe transplant require a lot or any glasswork? Can it be sealed into place with some sort of caulk, putty or epoxy. Since I haven't done any glass work before, I'm a little afraid of it. Should I be? I have a dremel and an air compressor for any air tools that might be helpful.

What other parts are needed to do the 144mm conversion?

1. superjet 144mm pump

2. some sort of different steering line

3. Is another driveshaft for the pump required? Does it require a superjet driveshaft or will the fx-1 stocker work? I've also heard about someone using a 1 inch setback 144mm pump with good luck. I'm not sure what a 1 inch setback would do (I think it was a magnum 144mm 1 inch setback pump).

I'm really excited that it might be possible to do the 144mm conversion on my own. The Kawi conversion seemed doable too, but it sounds like most would prefer the superjet conversion if the difference in cost didn't matter too much. It sounded like the kawi conversion could be done for as little as $100 plus the price of a different impeller while keeping the current rideplate and intake grate.

The idea of later grinding out the intake area and using a superjet intake is giving me a woody.

 

[tom21]

so as not to be confusing by answering a question i am not sure I understand...to do the 144 you need to machine the mounting pads on the wear ring and if you plan on keeping the stock bilge also the nozzle. then new pads or the old ones will be rewelded in the correct position. you need a complete sj pump and the fx driveshaft. Bonzai bob did a writeup and a few others have done similar installs with more or less work. one guy made a stainless bracket to use the fx holes and sj wear ring holes. pretty slick. bobs retained the stock plastic pump shoe they just tapered it to blend it a little. I think yamahammer made the post on bobs thread. if you want to do it all you need to do the whole pump intake cavity- glasswork! and install a 144 shoe. we skipped the glass and shoe. works fine. if you have machining equipment and can weld you can do this job yourself. there is more to it like machine down some spots but for the most part the wear ring is the big deal. you can keep the stock steering cable.

I posted some pics somewhere, bobs has better shots I think. its pink. fuggin texans!!lol

 

[curt248]

Interesting. It sounds like a lot of people who did the 144mm conversion, did not change the shoe to the 144mm size. In that case, the 140mm kawi conversion might be more effective since the kawi 140mm pump ring is installed.

This is a tougher decision than I though. I guess I should do some more research to see if I can handle the 144mm pump conversion. The idea of doing the complete conversion seems like it would be the most effective mod since it would have the entire superjet intake and pump setup yet lighter.

Has anyone tried both the full superjet conversion and the standard 140mm kawi conversion (with no intake modification) and compared?

The ability to get more water into the pump by making the intake area bigger and the 4mm bigger pump would probably be the most effective right? I wonder what the difference is in the real (not theretical) world is....

 

[tom21]

for4 me the main consideration was being able to replace the wear ring easily and cheaply. if you do this conversion and use the wear ring with the plastic liner its only 40 when you need to replace it. either way its an improvement.