Hey guys, first post, looks like a great ski forum.
Last summer I got a 94 JS750SX, everything mechanical is stock. It's actually a very clean ski under the hood, almost spotless, doesn't look like it got much use. The exterior however is not all stock, it's white in color all over with new hydroturf installed. Whoever installed it did a terrible job because it's peeling up in spots. Also, the back of the ski where the fire extinguisher compartment is, handles/plugs were removed and the turf was just laid over an open hole. There is a graphics/decal kit on it blue in color that makes it look like a superjet. I'll try and get some pics so you can see what I'm talking about. The hull, has quite a few nicks but overall seems in good shape.
Anyhow, I had a question about the stock carb. The elevation where I picked up the ski was about 4400 feet and I carried it back home to 750 feet, so pretty big difference. First time I fired it up it jumped out of the water right away but then started running bad. Never again really had much low end power, and the next time I tried it when It would get good and warmed up it wouldn't stay running (not an idle issue either, just plain quit when it got hot). I believe it's a carb jetting issue due to elevation. However, I know nothing about these skis or engines so I'd like some opinions and feed back.
It has the stock twin carb and I haven't taken it off and checked it out yet, but what can you tell me about the stock jetting? Do you think the previous owner would have re-jetted it to run those elevations? I was under the impression that these things were designed from the factory to run at sealevel. Now, bear with me because I'm still a novice but, what will I need exactly to get the carb jetted properly at my elevation. Can I just take out the smaller jets (if it's been re-jetted) and run it like that or will I have to order new jets and put them in? Where's the best place to get these parts?
OR, should I look at getting a different carb altogether and scrapping the stock one? I've read about these ski's a bit and have never seen anyone mention the stock carb.
I'd like to hear your thoughts, thanks.
Last summer I got a 94 JS750SX, everything mechanical is stock. It's actually a very clean ski under the hood, almost spotless, doesn't look like it got much use. The exterior however is not all stock, it's white in color all over with new hydroturf installed. Whoever installed it did a terrible job because it's peeling up in spots. Also, the back of the ski where the fire extinguisher compartment is, handles/plugs were removed and the turf was just laid over an open hole. There is a graphics/decal kit on it blue in color that makes it look like a superjet. I'll try and get some pics so you can see what I'm talking about. The hull, has quite a few nicks but overall seems in good shape.
Anyhow, I had a question about the stock carb. The elevation where I picked up the ski was about 4400 feet and I carried it back home to 750 feet, so pretty big difference. First time I fired it up it jumped out of the water right away but then started running bad. Never again really had much low end power, and the next time I tried it when It would get good and warmed up it wouldn't stay running (not an idle issue either, just plain quit when it got hot). I believe it's a carb jetting issue due to elevation. However, I know nothing about these skis or engines so I'd like some opinions and feed back.
It has the stock twin carb and I haven't taken it off and checked it out yet, but what can you tell me about the stock jetting? Do you think the previous owner would have re-jetted it to run those elevations? I was under the impression that these things were designed from the factory to run at sealevel. Now, bear with me because I'm still a novice but, what will I need exactly to get the carb jetted properly at my elevation. Can I just take out the smaller jets (if it's been re-jetted) and run it like that or will I have to order new jets and put them in? Where's the best place to get these parts?
OR, should I look at getting a different carb altogether and scrapping the stock one? I've read about these ski's a bit and have never seen anyone mention the stock carb.
I'd like to hear your thoughts, thanks.
