FX-1 Base Gasket ?

[Spheeler]

How tough is a base gasket to replace in a 760 yamaha fx-1.
I've found a guy selling one that he says needs a base gasket because water is leaking into the cylinder.

 

[mthomps]

http://www.blowsion.com/products/625-aluminum-base-gasket-yamaha-701760.aspx

Have fun rippin!

 

[Spheeler]

So its nothing big to fix?
Would I have to totally take the engine apart?

 

[mthomps]

If that's the problem than it shouldn't be too hard...I'll post the manual in a second...If anything you might be able to talk him down a bit on the ski price...maybe. There is an influx in interest lately it seems on yamaha stand ups...and for good reason.

First stand up? It's a blast...go yamaha!

 

[mthomps]

http://www.mediafire.com/?z2wmii5mwjl

Just for your information..most of the tech info you will ever need is right here or in that book. A lot of things don't seem to be in that book though...but your in luck because with a good google search for specifically this website you will have the information you need.

Just type whatever you want to search followed by "site:x-h2o.com". This makes google search only this website. For that manual all I did was type...

"fx1 manual site:x-h2o.com" and it was like the 4th link.

If you have trouble searching pm me I'll help ya find it!

Also pm jetmaniac for the base gasket probably has faster shipping and better price! Best prices I've found.

 

[Spheeler]

Thank you very much for the help!
According to him he was riding it 3 weeks ago then water started leaking into the cylinder. I have yet to see it though, he posted it for sale then went out of town for a week.
It also has some aftermarket parts that the guy he got it from installed.
Oddly though he claims the title says its a '93 fx-1?
It will be my first ski, I've heard fx1's can be tricky to ride though. So I'm a little worried.
He wants 1000$ for it, says the hulls in good shape and has stock paint and stickers even.

Is there anything I should really look out for when I go check it out?

 

[Crab]

You have to do a leakdown test to verify thats the issue, but IMO if it is the problem probably something else is the cause and be prepared for a teardown.

 

[mthomps]

Crab is right please do a leakdown test it will save you a lot of headache.

http://www.groupk.com/tec-airleak.htm

 

[mthomps]

Thank you very much for the help!
According to him he was riding it 3 weeks ago then water started leaking into the cylinder. I have yet to see it though, he posted it for sale then went out of town for a week.
It also has some aftermarket parts that the guy he got it from installed.
Oddly though he claims the title says its a '93 fx-1?
It will be my first ski, I've heard fx1's can be tricky to ride though. So I'm a little worried.
He wants 1000$ for it, says the hulls in good shape and has stock paint and stickers even.

Is there anything I should really look out for when I go check it out?

Far as I know fx1 is 94 only! Could be his error an error on the title is just as likely, once they are titled they don't really care anymore.

No need to worry about it being tricky to ride, fx1's come with plenty of power...701 driven which is the starting platform for jet ski freeride/freestyle. Just remember to give throttle to turn and if you start to lean too far. You will get a great work out and have a blast man. 1000 is a good price. Usually air leaks can be corrected with an engine gasket set and making sure fuel line and filters work properly. Most information on that is in the fx1 shop manual linked to above. Even if you buy and it has problems they can be fixed relatively cheap.

You can ask for a compression test which will tell you if the motor needs top end rebuild. 150/150 is factory, if each whole is equal or 1 or 2 off of each other you are in good shape with the buy, I'd say.

Keep in mind I'm still learning myself listen to the advice here given by people it is usually great here. I have bought a ski with bad air leaks in the past. A good indicator is if on trailer start the engine free revs up or if on multiple starts the idle is inconsistent.

 

[Spheeler]

I thought they were only '94-95 too. He was shocked when I told him haha.
He told me its got a 760 rather then a 701.

I'm hoping I wont have too much trouble, I know how to water ski and wakeboard.

And with that link you provided about the leak down test, is there anything else to that page? It talks about a picture of how to make the device.

 

[WFO Speedracer]

There is no water at the base gasket,it is therefore impossible for a base gasket to cause a water leak into a cylinder, if water is actually leaking into the cylinder it is either at the head gasket, one of the exhaust gaskets or you have a bad cylinder casting with a pinhole leak from the cooling jacket into a port, I have only seen the latter one time.

 

[JetManiac]

There is no water at the base gasket,it is therefore impossible for a base gasket to cause a water leak into a cylinder, if water is actually leaking into the cylinder it is either at the head gasket, one of the exhaust gaskets or you have a bad cylinder casting with a pinhole leak from the cooling jacket into a port, I have only seen the latter one time.

Exactly, Do not listen to explanations of what is wrong or how to fix from ignorant craiglist sellers. If I had a dollar for every craigslist jacknuts that told me that his ski just needed a battery when it was really a

wateringestedbeensittingforalongtimelockedmotorlockedpumpcrustycarbdisaster

then I would be rich, but I am wiser....Beware especially for a first ski. A 'needs work' ski should be priced much lower so you can afford the larger than expected repair bill.

 

[Idok]

Exactly, Do not listen to explanations of what is wrong or how to fix from ignorant craiglist sellers. If I had a dollar for every craigslist jacknuts that told me that his ski just needed a battery when it was really a

wateringestedbeensittingforalongtimelockedmotorlockedpumpcrustycarbdisaster

then I would be rich, but I am wiser....Beware especially for a first ski. A 'needs work' ski should be priced much lower so you can afford the larger than expected repair bill.

hahahah...man, it just needs a tuneup!

 

[kevbo]

There is no water at the base gasket,it is therefore impossible for a base gasket to cause a water leak into a cylinder, if water is actually leaking into the cylinder it is either at the head gasket, one of the exhaust gaskets or you have a bad cylinder casting with a pinhole leak from the cooling jacket into a port, I have only seen the latter one time.

It is difficult for cooling system water to get inside the engine without having a hole between the transfer port and water jacket. In any case have a significant maintenance budget if you want to stay in the hobby for very long. Most owners abuse and neglect their toys once the new wears off.

 

[cattledog]

hahahah...man, it just needs a tuneup!

even worse just needs a battery , i just happen to bring a good battery with me all the time and guess what it is never the battery always something much worse, BEWARE LIKE JETMANIAC SAYS

 

[Idok]

even worse just needs a battery , i just happen to bring a good battery with me all the time and guess what it is never the battery always something much worse, BEWARE LIKE JETMANIAC SAYS

I went to look at a ski one time....same story different day, when I popped the back of my truck and the dude saw flashlights, comp guage, fresh battery and tools he went ghost white lol

 

[WFO Speedracer]

It is difficult for cooling system water to get inside the engine without having a hole between the transfer port and water jacket. In any case have a significant maintenance budget if you want to stay in the hobby for very long. Most owners abuse and neglect their toys once the new wears off.

No Kevbo it was on a brand new X2, there was a pinhole in the casting from the water jacket straight into a transfer port, it started and ran fine on the trailer, as soon as you dropped it in the water it went down to one cylinder. What I did was take off the cylinder leaving the head and exhaust manifold attached, then I made a plate to block off the exhaust pipe gasket. I blocked off the exit hose on the head and attached an air blow gun to the cooling inlet at the bottom of the manifold. I then filled the shop sink up with water dunked the cylinder and applied air pressure to the cooling system, the pinhole leak was then quite easy to spot.

 

[Spheeler]

I thought it seemed odd that he knew right what the problem was. I know very little about marine yamaha engines sadly.
If I was going to fix one gasket I'd probably just end up getting a whole kit and replacing them all at once.
Will a leakdown test help me out in this situation, is that something I should try to get done while I'm looking at it?

 

[WFO Speedracer]

I thought it seemed odd that he knew right what the problem was. I know very little about marine yamaha engines sadly.
If I was going to fix one gasket I'd probably just end up getting a whole kit and replacing them all at once.
Will a leakdown test help me out in this situation, is that something I should try to get done while I'm looking at it?

A leakdown test would verify you had a leak but you would not be able to pinpoint its location as the leak would be internal into the cooling system.

 

[Spheeler]

Yea there are some terrible ones out there, but every now and then you come across someone who isnt.
My personal favorite are the ones that dont really know what they have so they ask too much.

I thought if the hull was in good shape and engine didnt seem like a disaster, it was an alright deal.
In canada ski prices can get a little outrageous!