Surfriding Got my first ski and have a few questions.

[LMnsr]

Hello,

I got my first ski a couple weeks ago and was wondering if my pole vents are ok the way i got it.
The reason I ask is because all the ones I see run all the way up into the pole with no wires showing. My hood is vented so I'm guessing the engine is getting enough air.
It is a Group K milled head, yamaha 701 bored to 710cc with mild porting, carbon reeds, and factory b pipe.
It is pretty hot where i live so I don't know if it's normal since it's my first ski. but i rode with shorts and the water that comes out the side burns when the wind blows it on my leg. But the ski ran fine to me. Just wondering if it is maybe getting too hot and what i have to do to fix it.. I am planning on getting either an xmetal pole or rrp since the umi pole on it is pretty long and it doesn't really help me since i'm 5'7. I was thinking about having it chopped but still don't know if it's worth it

 

[aero92x]

Chop...chop

 

[Kohldanielzimmer]

The breather tube appears to be broken off flush with the the pole bracket. This could cause undue wear on the cables/ wires and certainly a lot of undue water intrusion into the engine bay.

 

[Harbor]

Do you have single cooling with the pisser outlets on right side of ski near tray area?
With dual cooling you'll have two hoses from bulk head supplying the engine with water, normally both go to barbed fittings on the exhaust manifold above the starter, with single cooling you'll have just one.

My old kawa 650sx has single cooling and a pipe and it's water outlet temp is hot, sorta burning, doesn't really burn but gives that impression when you feel it for sure.

On your poll it looks like maybe the right breather tube is split in two, can't tell on the left one though, looks like it's capped but then in that other pic looks like two coming down from above the water box.

 

[LMnsr]

The breather tube appears to be broken off flush with the the pole bracket. This could cause undue wear on the cables/ wires and certainly a lot of undue water intrusion into the engine bay.

Thanks, The left one has a foam stuck into it so it's capped. Is there a temporary solution for now that i can do to fix it?

 

[LMnsr]

Do you have single cooling with the pisser outlets on right side of ski near tray area?
With dual cooling you'll have two hoses from bulk head supplying the engine with water, normally both go to barbed fittings on the exhaust manifold above the starter, with single cooling you'll have just one.

My old kawa 650sx has single cooling and a pipe and it's water outlet temp is hot, sorta burning, doesn't really burn but gives that impression when you feel it for sure.

On your poll it looks like maybe the right breather tube is split in two, can't tell on the left one though, looks like it's capped but then in that other pic looks like two coming down from above the water box.

I'm not sure if it is single cooling but there are 2 pissers on the right near the tray area. Yeah it doesn't literally burn but definitely feels like it ha

 

[Harbor]

Those poll tubes are different colors, blue in poll and grey in hull... With that poll and pivot bolt set up it doesn't look like there is enough room for two tubes??....
Also looks like you plugged the right one too with foam, good idea, water won't come in either and you get air thru hood vents. I'd prolly leave it alone until you get your new poll? Or see if two new ones would even fit and replace... Your next ones run them longer so they lay flat on the engine bay floor....
Is that ski from your area already? Looks like water temp about 75ish
Iam interested to know if dual cooling or not and how your ski water lines are routed, you can look at the bulk head behind the engine and look for your cooling lines coming in to engine....
Normally dual cooling 2 hoses @ bulkhead to ex manifold, rear head nipple to lower head pipe, front head nipple to pisser, front upper head pipe to a T overboard and to stinger

 

[simofx-1]

what hull is this? ,it looks good

 

[LMnsr]

what hull is this? ,it looks good

It is a Bob Gen 2 surf hull. But they pointed out on another post that the nose is different from the others. Seems like they added a splash guard

 

[LMnsr]

Those poll tubes are different colors, blue in poll and grey in hull... With that poll and pivot bolt set up it doesn't look like there is enough room for two tubes??....
Also looks like you plugged the right one too with foam, good idea, water won't come in either and you get air thru hood vents. I'd prolly leave it alone until you get your new poll? Or see if two new ones would even fit and replace... Your next ones run them longer so they lay flat on the engine bay floor....
Is that ski from your area already? Looks like water temp about 75ish
Iam interested to know if dual cooling or not and how your ski water lines are routed, you can look at the bulk head behind the engine and look for your cooling lines coming in to engine....
Normally dual cooling 2 hoses @ bulkhead to ex manifold, rear head nipple to lower head pipe, front head nipple to pisser, front upper head pipe to a T overboard and to stinger

Thanks. The right one wasn't plugged when i got it. I just found a blue foam in front part of the hull.
So i'm guessing this was used to plug the right hole since it fits perfect.
The ski was in California. I live in Aruba and the water here is warmer. The foam makes me think if it was the vacuum in the bay that pulled it in.
I tried to locate the cooling lines but to be honest I can't see behind the engine.
This is what i could see.

I tried to shove my phone in the back and take a picture but didn't really work out

 

[LMnsr]

And you are right, I don't see how two lines will fit there with the bolts. I'm pretty sure it's like that from when it had an rrp pole on it

 

[Harbor]

This line going to exhaust does it go to the lower head pipe nipple??

You can look at your pump from rear of your ski and check for dual cooling too. Viewed from rear of ski you have the steering nozzle first, then reduction nozzle, then next further in is the stator section. Look on either side of the stator section, does it have two hoses one each side going forward to bulk head or just one??

The reduction nozzle may have a capped off nipple coming in at a 45 degree angle on the left side, these are used for bilge siphon when scuppers and pumps are not used.

I did more searching of b-pipe cooling set ups and I found a bunch I've not seen before, more than a couple looked similar to yours so far.

You might be able to view your manifold nipples with a mirror and flash light, everything probably fine I'am just Wondering now that you've asked

Nice first ski!!!! Congratulations

 

[LMnsr]

Luckily I took a picture of it earlier.
I had to brighten the image a lot so you can see it. But that is the picture with the arrows from another angle and you can see where it connects to the pipe.
To be honest I have some knowledge on 2-strokes in general but not much on marine 2-strokes. same principles i guess but I will have to learn along the way. Hopefully the engine won't give me too many problems since it was recently rebuilt and has about 9 hrs on it now.
I will have to take a look at the pump later when I'm home. I know the nipple on the reduction nozzle is capped off. I was just wondering if since i live in warmer temps if i should have both the hood and the pole breathers working for the engine.
I will try to use a mirror to see also.

Thanks! I am more than happy with it. I think I lucked out with this ski. I was thinking about getting a sj as my first ski but I have to pay 40% import tax. so it wouldn't be fun to have to upgrade to a am hull after a few month's use. And to my knowledge the bob is a great learning ski for flips

 

[Harbor]

Thanks that helps, when you get time have look at the lower part of the head pipe on the " back side down low" should be a cooling hose on it as well, I'd like to know where it's plumed to..... The head pipe connects the silver exhaust manifold to your gray chamber for clarity.

Nice first ski, took me 10 years to get to a AM hull and I was still questioning if I should lol

 

[LMnsr]

Ok I will take a look when i'm home and let you know for sure.
What ski did you start off with and how come it took you so long to upgrade? sry just curious

 

[Harbor]

Lol!... Kinda backed into jet sking unintentionally while knowing nothing about it. Went to work one day and a co worker had his friends 91 650sx for sale for $650 so I bought it. Little while later same co-worker decided to sell his 96 limited Sj he raced to focus only on auto racing so I bought him out, everything for $2500, ski, work stand, helmet, suit, gloves, gas cans etc... So me and the wife started rec riding, all I ever did was repairs and overhauls over the years. I was not aware of this sit, what mods could be done or what was going on in this sport.... After 8 or so years I started looking at ebay, had a look at ski parts for something to do and found a plus 8mm stroker crank and Lamey cylinder for sale so I bought that, then a 62t case from Thrust to build a second stroker engine. To ba fair I wanted to get the wife a newer ski but I lost out on available sxr's for her so a nice 01 Sj came up for sale, it was clean and the owner showed me all modes that it had, I was impressed so I bought it and I become hooked........,,

 

[LMnsr]

Lol!... Kinda backed into jet sking unintentionally while knowing nothing about it. Went to work one day and a co worker had his friends 91 650sx for sale for $650 so I bought it. Little while later same co-worker decided to sell his 96 limited Sj he raced to focus only on auto racing so I bought him out, everything for $2500, ski, work stand, helmet, suit, gloves, gas cans etc... So me and the wife started rec riding, all I ever did was repairs and overhauls over the years. I was not aware of this sit, what mods could be done or what was going on in this sport.... After 8 or so years I started looking at ebay, had a look at ski parts for something to do and found a plus 8mm stroker crank and Lamey cylinder for sale so I bought that, then a 62t case from Thrust to build a second stroker engine. To ba fair I wanted to get the wife a newer ski but I lost out on available sxr's for her so a nice 01 Sj came up for sale, it was clean and the owner showed me all modes that it had, I was impressed so I bought it and I become hooked........,,

Ha that's awesome! Honestly I didn't even know they still made standups lol since I live in Aruba i've only seen one here and it was an old square nose. Even when I go to the states I haven't really run into any. I've been through so many sports, as a kid i used to race gokarts in international competitions mostly in south america, then i was in skatboarding, freestyle bmx, surfing, dirtbikes, and now that I'm a bit older I had a drift car (R33 Nissan Skyline) and was putting all my money into it to start drifting. But where I live there are no tracks other than a dragstrip, so it would have been worthless to invest all that money in the engine and suspension. BUT here I am surrounded by water ha. So i Sold the car and got the BOB. and i can't think of anything other than riding (except for my girl of course ha) I think it was the best move i've made so far purchase-wise.
I am thinking about buying one in the future for my girl. she tried mine out and loved it.
I will be home in about an hour or so. I will have a look at the hose under the head pipe and try to figure out where it goes to. I will let you know

 

[LMnsr]

Ok so I found the line you are talking about under the head pipe but i couldn't follow it, my hands won't fit down there and i didn't want to remove the chamber atm. I think i will have to get a small mirror that i can manage to get down there in the hull to have a look.

I took a look at the stator and it only has one hose on the left side. The right side is capped off.
Left side
Right side
@Harbor

 

[Harbor]

Cool, good shots too. Didn't want you to take it apart, just Have a look. So you have single cooling which is fine. The good new is your pump and bulk head are already Plummed for dual cooling so prolly only manififold may need a second
Hole drilled And tapped to set it up. My old 650sx is set up pretty much the same and the waters pretty hot out the pisser but it's normal... You could upgrade to dual cooling pretty easy, here is how mine is set up

 

[LMnsr]

I saved that diagram for later. Its very helpful thanks. In the future when i have to work on the engine i might upgrade to dual cooling.