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97 GSX LIMITED GREY GHOST FUEL ISSUE
- Thread starter ape1972
- Start date
ape1972
Active Member
Hi Everybody,
So… Put the new check valve in and same issue. Slow to start cold but starts right up warm. I did play around with the choke and noticed it tried to fire up around 1/4 to 1/2 pull on the choke. I’m assuming the fuel air ratio is seriously off. Also when running is smokes and feels rough until I give it a few revs. I’d does fire right up after warm but runs very rough. Thank you all in advance!
So… Put the new check valve in and same issue. Slow to start cold but starts right up warm. I did play around with the choke and noticed it tried to fire up around 1/4 to 1/2 pull on the choke. I’m assuming the fuel air ratio is seriously off. Also when running is smokes and feels rough until I give it a few revs. I’d does fire right up after warm but runs very rough. Thank you all in advance!
ape1972
Active Member
Quick update!
I adjusted the low speed air mixture screw. Move it a 1/8 to 1/4 turn out and it feels much better. I also have fuel tank pressure as well. A little more fine tuning and we’ll be good! It looks like you all helped me resolve my issues. I appreciate you all very much!
I adjusted the low speed air mixture screw. Move it a 1/8 to 1/4 turn out and it feels much better. I also have fuel tank pressure as well. A little more fine tuning and we’ll be good! It looks like you all helped me resolve my issues. I appreciate you all very much!
ape1972
Active Member
Hi Everyone (again),
I have another issue after running for a while. I felt like I got the carbs pretty dialed in. It would fire right up cold and with no choke. However I was alway getting a lot of smoke. It always felt like it’s running super rich and never got that crisp throttle. No matter how much I adjusted the air mixture it would smoke pretty bad. I pulled off the pipe and it was an oily, sticky mess! I also looked at the oil pump it it is aligned. Any thoughts or suggestions are welcome.
Thank you all in advance!
Adrian
I have another issue after running for a while. I felt like I got the carbs pretty dialed in. It would fire right up cold and with no choke. However I was alway getting a lot of smoke. It always felt like it’s running super rich and never got that crisp throttle. No matter how much I adjusted the air mixture it would smoke pretty bad. I pulled off the pipe and it was an oily, sticky mess! I also looked at the oil pump it it is aligned. Any thoughts or suggestions are welcome.
Thank you all in advance!
Adrian
Grim
Well-Known Member
I am assuming it is smoking all the time not just start up? One idea, you stated that the pipe was oily, maybe you have the carbs dialed in but the oil in the pipe still needs to burn off. Try cleaning the pipe and get as much of the mess out and see if that clears up the excessive smoke.
Also, I would check and make sure you have the right spark plugs. What oil are you using? Have you pulled the spark plugs and looked at them to see if they are oily/dirty?
Also, I would check and make sure you have the right spark plugs. What oil are you using? Have you pulled the spark plugs and looked at them to see if they are oily/dirty?
ape1972
Active Member
Hi and thank you for the reply…
Yes the ski smoke is constant. I pick up this ski in 2020 and i’m just now getting around to it so that oily pipe was probably there before I bought it. I will change out the oil asap! Plugs are good but we’re a little wet and black but not real excessive. I think I will pull the head and the rave valves and look a little deeper into it.
Yes the ski smoke is constant. I pick up this ski in 2020 and i’m just now getting around to it so that oily pipe was probably there before I bought it. I will change out the oil asap! Plugs are good but we’re a little wet and black but not real excessive. I think I will pull the head and the rave valves and look a little deeper into it.
I couldn’t see how pulling the head would help in determining why it’s burning excessive oil? Does it use a lot of oil? When is the last time you had the machine on a good run?
You’re welcome, if it were mine I would get it running correctly and drive it first. They always smoke after sitting, even from when they are put away in the fall till they are brought back out in the spring, actually upon every start up, I find they smoke, not till they have been running 3 or 4 minutes does the smoke clear up. What you are seeing is normal
ape1972
Active Member
I haven’t ran it that long but it just doesn’t feel quite right. I will run it for a bit and get back to you all. Thanks for the advice!
Be careful of cleaning up the pistons and rings and then starting it up, you don’t want metal on metal. Good luck
ape1972
Active Member
Stevie96xp
Active Member
If it were mine would run it
. But I’m thst kinda guy. Seems to run fine I would jsut run that thing. On a 2 stroke if it’s smoking it’s a good thing also what 2 stroke oils smoke really bad no matter what
That first crank picture looks like a lot of nasty surface rust. I would not be comfortable if it was mine.
That thing is super rich, you shouldn't have that much wet oil and fuel dripping off the pistons.
It is hard to tell if that is just fuel and oil on the cylinder walls or scoring.
I would double check needle and seats, pop-off springs and jets, that thing it rich!
That thing is super rich, you shouldn't have that much wet oil and fuel dripping off the pistons.
It is hard to tell if that is just fuel and oil on the cylinder walls or scoring.
I would double check needle and seats, pop-off springs and jets, that thing it rich!
ape1972
Active Member
I agree with you… i pulled the motor yesterday and opened the case already. Oddly enough the surface rust was just limited to that area. Everything else looked good. Bearings were quiet and smooth. Seals look near new with no leakage anywhere. As far as the top end that looked okay as well. Before I pulled the engine both cylinders were about 140 psi within a couple PSI. One question I did want to ask is should I hone the cylinders and re-ring or leave it alone?
Thanks again for the advice!
Adrian
ape1972
Active Member
Yes I thought it was excessive on the fuel as well. That definitely explained why it smoked a lot and was sluggish on the throttle. I will check the pop off pressure again. I re-jet the carbs to 98 specs and changed the needle and seat to the 98 specs as well.
now that you have the engine pulled, I would do a leak down test on the crankcase after you put it back together, do the cylinder walls have any scoring that you can catch a nail on? If they don’t no need to hone and re ring that engine. Perfect compression is 130 on a 951 and you have 140. My bet is it’s been a fueling issue all along. That’s where your excess smoke is coming from although excess smoke is the least of my worries when working on these, you will never hurt them from having to much oil or fuel. How did you reed petals look? Any light getting past them? You had said you put 10 pounds of pressure on the fuel inlet fitting after putting the carb back together and it held correct? What are the factory settings for the high and low screw in this? Also just curious if there are any markings on the top of the pistons? Is it a standard bore? With that kind of compression I’m thinking it may have been recently rebuilt? Make sure the ports have a good chamfer on them, a lot of people forget to do this.
I know very little about the 951 so take this with a grain of salt as I’ve never worked on one, but I was looking on Seadoo source and it looks like it has a accelerator pump on the pto carb? Is this correct? Just a thought but if there is an accelerator pump did you by chance change any of the lines for it? I remember reading somewhere that one of the lines has a restrictor in it, similar to a pilot jet. If it got removed would that not allow too much fuel?
That would mean it’s from the piston skirts. Please post pictures.
ape1972
Active Member
Here are some pics… the piston marks look much worse than they feel. Left side bore looks rough but is smooth however the right side has very very light scoring. But nothing above the chambers. The pistons look and feel the same to their corresponding cylinder. The rings also look good. Obviously I would like to get one season out of it because it has good compression but I don’t want it to detonate while someone is riding it.
Thanks,
Adrian
Thanks,
Adrian
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