95 GTX Runs Great, Smokes Pretty Bad

[snowzach]

Just got this 1995 GTX. When I got it, it ran quite well and didn't seem to smoke abnormally from what I know of 2-strokes (only run out of the water). It had the grey fuel lines so I went about cleaning the carb screens and replacing all the fuel line (gunked up, not too bad though). I also noticed the oil injector valve/line seemed to be way out of adjustment. I would guess it was sitting at the 8/9-o-clock position. I never actually ran it in the water before I worked on it since I read how bad those grey fuel lines were.

Well, I decided to adjust it per spec and line up the oil injection lever marks to about the 5-o-clock position. Now it seems like it's getting way too much oil. Not real real bad but it definitely smokes more than what I would guess would be normal at idle and low speed. It also seems to be fouling the plugs as they look kinda wet with oil. However, when you open it up it runs perfect as near as I can tell though. Compression is 140 on both cylinders.

So, should I keep decreasing the oil flow on the valve or is this just covering up some other problem I should be fixing? Is it possible that some of these just need to have the oil injection turned way back from "normal"?

 

[mikidymac]

There could be a few issues. The oil pump is set to go to full open if something goes wrong like a cable breaks. If you take the cable off the lever should spring up to the 12:00 position you want to wind the spring up so typically you would turn it counter clockwise then reinstall the cable. This will have the arm and spring trying to pull the cable and not pushing it. With the idle set correctly you should adjust the nut on the cable end to make the line on the pump and arm aligned. It usually takes a mirror to get it dead on. There is no reason you should adjust it any different than the two lines lined up.

They do smoke some but it should not kill all the bugs in the area.

 

[LouDoo]

It's hard to say how much smoke is too much smoke. My ski's all smoke a little at idle and no wake speed, once up to normal cruising speed there should be no noticeable smoke. It sounds that you have the oil pump adjusted properly, you could have leaky crank/rotary valve seals. Try pinching off the gravity feed line to the engine when your ski is not in use and un-pinch when you use the ski, see if the situation improves.

Lou

 

[Mickirig1]

You have a little play in your carb cable before you adjust oil cable? Idle is correct?

 

[snowzach]

I think I got it all right

Yah, I'm pretty sure everything is adjusted correctly. The oil injection spring return was not on when I started and I finally figured out (thanks to this forum) that I needed to wind it around to get the spring to catch so I'm sure that's all okay. There is not much play in the throttle cable but it is to the point where it's pulling on the oil injector cable (at 3-o-clock) position when at full throttle.. Like the WOT throttle position is limited because the oil injector cable is wide open and pulled as far as it can go. I did get the marks to line up (with a mirror).

The smoke wouldn't bother me much except that it does seem like it's fouling the plug. (it's just wet with oil when I take them out) At low throttle it occasionally misses and seems to run rough after the plugs get wet. (New plugs seemed to idle great) and as I side, wide open it hums along at 45mph perfect.

 

[Strizzo]

Check to make sure someone didn't put the cable between the carb and pump on upside down. It will hold the pump at like 1/2 throttle all the time and only let the throttle cable pull to about 3/4 throttle

 

[snowzach]

Hmmm... Unless I'm missing something I don't think its possible with mine. The cable is literally just a stainless cable with nuts on both ends. Theres no sleeve or anything. It just attaches to the throttle and the pump with a little plastic elbow in the middle to help it change from up down motion to front/back motion on the pump lever. Thanks for the suggestion though.

 

[Strizzo]

Just make sure the barrel end of the cable is on the oil pump arm and the end with the little lead ball is on the carb end. It is possible, I assure you. My 95 gtx was like that when I bought it.

 

[RedAggie03]

If it helps you, I find that my 1995 smokes more than I feel it should...More than my 1996 GTX for sure.

 

[kicker]

This is a oil pump pic from a 95 XP 720, should be the same as yours.
A slight adjustment required in the cable will not normally give out excess smoke. Even it was wide open at idle, it is still only running 40-50:1 which would not cause smoke to billow out of the exhaust.

I will have to agree with Loudoo, you might have a crank/RV seal that oil is seeping past and getting into the bottom end.

 

[LouDoo]

If it helps you, I find that my 1995 smokes more than I feel it should...More than my 1996 GTX for sure.

You know now that I think about it, my 96GTI (717) does smoke more that my 96GSX (787), but I wouldn't call it excessive.

What oil are you using?

Lou

 

[mstewart440]

So does mine, but its an old motor running premix and maybe oil injection too. It smokes on startup and leaving the no-wake zone and then its fine. The wife and kids hang their heads in shame...I pump my fist in the air and shout "Smokin & 2-Strokin"!

 

[snowzach]

Mine actually looks just like this. Well, it's 19 years old (although light duty years from the looks of it) so I guess I shouldn't be surprised if there's a seal out of it or something. I use Valvoline Marine 2-Stroke oil.

 

[RedAggie03]

I use the SeaDoo 2-stroke oil. I'll try and take a video this weekend of mine, I'm headed to the lake!

 

[snowzach]

So in this case, I'm wondering if a picture is worth a 1000 words. Can someone tell me if this looks right? And if not, what's off on it? I am still smoking a lot and idles misses at lot and plugs are wet with oil... Otherwise it's almost like it runs too good otherwise for anything else to be broken.

You can see the throttle lever here along with the piece that pulls the oil injector lever. I actually had to crimp a piece of lead shot into my cable (red arrow) and adjust it all the way up to get the marks to line up on the oil injector. In this position when i pull the throttle, the oil injector lever is as far as it can do and stops the throttle from opening up farther. (I don't this it has much farther to go though)


Here's the oil injector lever. As far as I know, I have the marks lined up. It seesm too far counter clockwise though. As I said you can only pull the throttle so far. I've also read that the lever should be in about the 5:30 position... this looks more like 4:30 to me.


Anyhow, just hoping someone can see this and hope something looks obviously off to someone that knows these better than I.

 

[Mekanix]

Your waaaaay off

look at the other pictures. look at the two lines, Notice your line is covered up by rust. Notice the distance from the line to the hook of the spring on yours vs the others. Look at the angle of the arm while its at idle position on yours and the others.


The arm is almost straight down or at 5:30 . Yours is at 4 oclock like you said

That's why your running so smokey.

At idle that pump flows almost nothing. In the position your in, That is almost 50% flow.

 

[snowzach]

Well, that's obviously my problem then..... so... uhhh, there's two lines? So you say it's covered up in rust? So what is the line I am lined up to now for?

 

[LouDoo]

View attachment 27171
Mine actually looks just like this. Well, it's 19 years old (although light duty years from the looks of it) so I guess I shouldn't be surprised if there's a seal out of it or something. I use Valvoline Marine 2-Stroke oil.

I don't know if anyone pointed this out but you are using the wrong oil, I know for a fact that Valvoline doesn't make an API-TC low ash oil. You should be using either a mineral or a synthetic blend API-TC rated oil. Walmart carries Quicksilver, API-TC Synthetic Blend PWC oil. Sorry we didn't catch this earlier.

Lou

 

[snowzach]

I don't know if anyone pointed this out but you are using the wrong oil, I know for a fact that Valvoline doesn't make an API-TC low ash oil. You should be using either a mineral or a synthetic blend API-TC rated oil. Walmart carries Quicksilver, API-TC Synthetic Blend PWC oil. Sorry we didn't catch this earlier.
Lou

Well now... that's also good information... Thanks!

 

[kicker]

Well, that's obviously my problem then..... so... uhhh, there's two lines? So you say it's covered up in rust? So what is the line I am lined up to now for?

Look at the picture I posted, there is a notch in the arm and a line on the flat circle surface shown by the 2 red arrows. Those to things need to line up across from one another at idle. Scratch a bit of the rust off your arm and it will be a little easier to see the notch.

 

[snowzach]

Yah, I took a wire brush to the arm there... Voila... the line I have been looking for.. thought I was supposed to use that dot. I'm certain that was my issue. Hopefully I can get on the water this weekend and test 'er out.. Thanks all for the help!!!