Towed 3 times so far!!!

[crisso]

Sorry mate.Kick the ski over.
Lou .What sort of oil inj does he have?

 

[crisso]

Sorry.Kick the ski over first.Check your oil lines.Do the trailer bit first and keep you hand on the choke to kill an overun

 

[zlat46]

Already done all that plus did comt test sitting on 140 both cylinders so now the real test in the water

About to head out soon we have 30 degrees today so should be a good day for it

 

[zlat46]

Ok so tested just today!!!!

Outcome:
Rebuilt carbies
New fuel lines
Solas prob and wear ring


The ski still bottoms out! After all that this is a nightmareee

Can anyone suggest anything else?

Now it's more of a .... Full throttle and it will just cut out and then kik in on it's own along with bogging

I really don't know what to do now such a disappointment , felt like just tipping the batrd over and leaving it there

 

[LouDoo]

Sorry I don't have time to go through all the posts on this thread so some of these things you might have already tried.

1. I would clip back the spark plug wires about 1/4" and re-install the spark plug boots.

2. Replace the fuel selector valve, I have had no luck cleaning these I have always just replaced the valve, only about $20.00. For testing you could just bypass the valve.

3. Re-check the carbs. Were these rebuilt with Mukini kits, check the pop off.

Lou

 

[crisso]

Zlat.Mate I asked 2000 questions here about all different stuff.Good q's get great answers.What Lou said about the plug wires.What about the plugs?The selector valve they mean is the fuel tap.Off/on/res.These guys wont give up so you can't either.Read Minnies post again.It gives a good insight

 

[crisso]

Also read the thread,,Seadoo stalls after accelerating.Compare yours and his

 

[Deco]

check for tiny holes in the exhaust around the welds or a tiny hole in the crank case. couldnt hurt.....i have had that problem bog me down at higher rpm.

 

[crisso]

Anyone help an Aussie mate over here please.The mechanics charge like a wounded bull and half they say is bulls,,t and the other half is lies.Deco has helped and ZZZ needs a bit of that.Thanks

 

[zlat46]

Thanks alot for your input guys,

Pulled the selected off it's perfect ran it on reserve and same problem

The only thing I haven't done is chop the plugs and re do them

I'm just really stumped, dono it's almost like it cuts or starves from fuel

Called my mechanic while out on the water and he maybe suggested that the mixtures or carb settings are out

I think the idle is way to low coz I had to accelerate to keep it running

Also the throttle is kinda delayed now after my ride today

It ran good out of the water when I got it back from the Makanic all I did before I took it out was change the old grey fuel lines to black ones, one by one so nothing got mixed up
Started her up and ran great out of water but the problem is in the water

Could the carb settings be causing it to flood or lean out air/fuel?

Thanks again

 

[zlat46]

Thanks alot for your input guys,

Pulled the selected off it's perfect ran it on reserve and same problem

The only thing I haven't done is chop the plugs and re do them

I'm just really stumped, dono it's almost like it cuts or starves from fuel

Called my mechanic while out on the water and he maybe suggested that the mixtures or carb settings are out

I think the idle is way to low coz I had to accelerate to keep it running

Also the throttle is kinda delayed now after my ride today

It ran good out of the water when I got it back from the Makanic all I did before I took it out was change the old grey fuel lines to black ones, one by one so nothing got mixed up
Started her up and ran great out of water but the problem is in the water

Could the carb settings be causing it to flood or lean out air/fuel?

Thanks again

 

[LouDoo]

If it runs good on the trailer but runs badly in the water you could have low compression. Compression should be between 135-150psi. I'm assuming you have either the 717 or 787 motor.

Lou

 

[zlat46]

Hey Lou

Comp test done 140 exactly on both cylinders
I have the 787 motor

Nudging by the low idle I'm guessing it's out of tune but yeah dont know

I'll post a vid of the delayed throttle I took after the ride even out of the water

 

[LouDoo]

Your compression is fine, that's good news. There's really nothing to go out of tune, the rotary valve timing could be off, but that's a long shot. Usually if the rotary valve timing is off it won't run at all. I think we're probably back to the carbs.

Lou

 

[zlat46]

I noticed theres like a in line fuel filter but its cup down the bottom is just like a clear cup with no filter in it so the fuel by passes through there, this wouldn't be causing issues would it?

 

[LouDoo]

I don't think that it's causing an issue. It's the water separator/fuel filter, and it is supposed to have a filter, it's a fine mesh plastic filter, similar to the carb. filters. You can probably do without the filter but I would put an inline fuel filter, I use a Fram G12 or equivalent.

Here's what the missing filter looks like.

http://www.parkeryamaha.com/seadoofuelfilter275500089.aspx

Lou

 

[zlat46]

Hi lou, it's already got the factory filter in place and the otherfilter is hooked up right next to it, so it has 2

It's so anoying, I was think the rotary valve but if it was that then it wouldn't even go, i hit just over 50mph and then te bog kicks in and slows right down and then just takes of again

Pulled the plugs out and they were fine I thayght I should double check as I'm running Pre mix but all good

 

[LouDoo]

I didn't understand what you were saying in post #40. I would take the extra filter out, especially if it doesn't have a filter cartridge in it. I'm still thinking something is not right with the carbs. If you take the carbs. off it wouldn't hurt to check the rotary valve timing.

Lou

 

[zlat46]

I didn't understand what you were saying in post #40. I would take the extra filter out, especially if it doesn't have a filter cartridge in it. I'm still thinking something is not right with the carbs. If you take the carbs. off it wouldn't hurt to check the rotary valve timing.

Lou

Yeah I bought the ski like that dono why it's got that additional filter there without the insert... My mechanic from memory said it was a real pain checking or setting the rotor valve is this right?

Like the other Australian said we get charged an arm and leg here, not many ski mechanics so they charge like doctors

 

[zlat46]

this was just after i finished yesterdays day out.

as you can probably here its running very rough and the acceleration is very delayed, especially if your just going quick revs then it almost doesnt even register it.

http://www.youtube.com/watch?v=HS81SF6SUaU

i know i should have taken the video whilst on water, but forgot amount the anger

 

[LouDoo]

Checking the rotary valve timing is not all that difficult, it's outlined in the service manual. Here's a link with additional help and how to do it without special equipment. Check post no. 12.

http://www.seadooforum.com/showthre...side-the-quot-787-quot&highlight=rotary+valve

If the rotary valve timing is off there is going to be a reason, be sure to check the gear(s) for wear or damage, also visually check the rotary valve itself.

Lou

 

[crisso]

:lol:I'am the other Australian.Zlat.Hang in there.The guys that are answering are up there mate.I am leaning at carb issues and or fuel delivery issues.Idle on trailer is about 3 grand and in water about 1500

 

[Deco]

sounds like the carbs, everyone is right. did your guy replace the jets or spring? get the mechanic out there or send the carbs to crisso :thumbsup:

 

[crisso]

The thread.Replaced fuel lines today.Zlat.Good read.Carbs have been done bad.Where are you?Can I help?

 

[Minnetonka4me]

The carbs are not "done" if they have not been rebuilt....with genuine parts. It sounds like the needle and seat is not doing what its supposed to do. or maybe the lever is not adjusted correctly and it sometimes being held open, or isnt opening when it should.

The rotory valve timing is prob not it...when its off a tooth its really sputtery and backfires.

You may have a malfunctioning check valve in the vent lines...that can cause the issues you are having.