sludge thru pulse line into carb

[Gotme1]

Wats up everyone. I am having an issue with my 99 gsx ltd. It has the 951 motor that took me a while to get running after I bought it and the guy told me it just needed a starter. Go figure he was lying. But anyway, to the issue. I have rebuilt carbs and cleaned entire fuel system. When I bought it there was water in both cylinders. Pulled dome off, inspected Pistons and cylinders. Everything is in pretty good shape. Changed head gasket and reassembled. Tried to change crankcase oil but couldn't extract any oil from motor so I just added 40cc of oil and put it in water to test it out. Ran good for about 15 min started bogging so loaded up and took it home. Pulled carbs off and I am getting oil sludge in mag carb where pulse line connects. Cleaned carbs and ran jet ski again, same thing happened. Y is pulse line pumping sludge into carbs? Is it because water made its way into crankcase and mixed with the oil? If so is there any way to clean it without cracking the case open? Any advice is greatly appreciated guys. Trying to get this thing on the water in a couple weeks for our family vacation.

 

[Gotme1]

Oh and one other thing. When I pulled plugs after the second time I took it out. The plugs had a lot of carbon build up. Cleaned plug the best I could while I was on the water but couldn't get a good spark out of it. Isnt carbon build up from running rich? Doesn't make sense because with carb being restricted from fuel, it would be running lean. Thanks again for any help.

 

[LouDoo]

Where exactly did you put the crankcase oil? A 2-stroke doesn't use crankcase oil are you talking about counterbalance oil?

Lou

 

[Gotme1]

Took out the small bolt from bottom of engine. Tried to extract the oil with a turkey baster and a hose attached to it. Couldn't extract anything. Followed directions from a thread that explains how to change crankcase oil on 951 motor. http://www.seadooforum.com/showthread.php?36426-Changing-Crankcase-Oil-947-951-engine

 

[Sportster-2001-951C-Stock]

Your fuel pump diaphragm has a hole in it if there is oil coming from the crankcase into the fuel line. The PTO carb will get the goo in it too.

It's going to take a thin straw to get into the countershaft housing, not easy. That's the best way though. At least you know you've got oil in there now. I think mine is probably more than necessary as well b/c I don't know for sure if I got it all out.

I'm a little bit concerned about what's coming out of the pulse line though, it shouldn't be gritty and rusty, it should be pretty clean, it's ultra clean in there with fuel+oil and air, there should not be brown junk coming from the fuel pump pulse line... That could be a sing of rust in the bottom end and bearing seizure could be coming soon.

Hopefully it's not much in there and it clears out quickly......

Okay, maybe your fuel pump stopped working because the diaphragm cavity filled with oily goo and grit which came from the crank case?

 

[Sportster-2001-951C-Stock]

I'm thinking your plug fouling is from rusty oily goo in the crankcase, sounds like there's rust in your engine from the water so at least go easy on the throttle for the time being, maybe it clears out but you could be heading for crank bearing issues if there's rust down there and that could get expensive if it throws a rod it might ruin the crankcase.

 

[Gotme1]

Thanks for the quick replies. I rebuilt carbs and replaced diaphrams with minukni rebuild kits. When I pull fuel pump off of carb the sludge is built up between the fuel pump cover plate where the pulse line connects and the clear diaphram. So is this clear diaphram the one you susspect has a hole in it? I am just confused as to why it is a sludge build up and not oil in its original form.

 

[LouDoo]

Took out the small bolt from bottom of engine. Tried to extract the oil with a turkey baster and a hose attached to it. Couldn't extract anything. Followed directions from a thread that explains how to change crankcase oil on 951 motor. http://www.seadooforum.com/showthread.php?36426-Changing-Crankcase-Oil-947-951-engine

I know that the thread says Crankcase/Counterbalance oil, but it's actually the counterbalance oil.

Lou

 

[Gotme1]

Yes. I agree with you guys. I think I am just going to pull motor and rebuild. I just bought tge ski and haven't really got to play on it yet but may add well rebuild as a sense of insurance so I won't have to worry about it later. Really appreciate you guys help. Any other suggestions or insight. Let me kno. Thanks again

 

[Gotme1]

Thanks for clarifying thay loudoo

 

[Sportster-2001-951C-Stock]

Thanks for the quick replies. I rebuilt carbs and replaced diaphrams with minukni rebuild kits. When I pull fuel pump off of carb the sludge is built up between the fuel pump cover plate where the pulse line connects and the clear diaphram. So is this clear diaphram the one you susspect has a hole in it? I am just confused as to why it is a sludge build up and not oil in its original form.

That's what I was thinking, I though at first you were saying sludge was entering the fuel lines. Then I realized you might be describing a lack of fuel due to the fuel pump diaphragm filling with sludge and stopping the fuel pump diaphragm from moving back and forth.

Sounds like a ton of something in your crankcase, like rusty sludge. So much that it stopped the fuel pump diaphragm from moving.