Hello all-
Having a little problem with a 95 750sx I bought a few weeks ago. The ski starts up and idles just fine, and at less than 50% throttle it runs great. However, when under load, the engine seems to stall out when I reach ~40-50% throttle. If I give it a shot from the primer I can power through to wide open throttle, so I figured I was running lean. Also once I got past 50% throttle, if i went back down it would stall out again. I took the high speed carb adjustment screw out from 1 full turn to 3 full turns in half turn increments, testing the ski each time. Nothing seemed to help. I also tried bringing the low speed screw out half a turn but that did nothing as expected.
It may be worth noting, that when the ski is on land with the garden hose hooked up, it does not stall out.
One thing I noticed is that there is some air in the fuel lines when I look at them, is this normal?
I'm on my way to buy new fuel filters now, but I don't think that's going to fix my problem, it happens at such a consistent throttle level, and only at that level.
Should add that I checked spark plugs and they're basically brand new.
Based on some advice I took the boots off the spark plug cables, and the wire didn't look too bad, but I cut some back anyway to expose some brand new looking wire. Took it out the first time after forgetting to reset the carb. The problem seemed to be slightly better (although it could be my mind playing tricks on me). I came back in and set the high speed adjustment screws where I found them (1 turn out) and went back out. The problem was basically the same. I came in again and opened the high speed adjustment screws another full turn. This did not seem to help much either.
FWIW, it seems that the stalling happens right when you would be switching from the throttle controlled by the low speed adjustment screws to the high speed adjustment screws (around 40%). I have no idea if this means anything. I'm pretty new to 2 stroke engines.
Any insight you could provide would be greatly appreciated.
Thanks in advance!
-Dan
Having a little problem with a 95 750sx I bought a few weeks ago. The ski starts up and idles just fine, and at less than 50% throttle it runs great. However, when under load, the engine seems to stall out when I reach ~40-50% throttle. If I give it a shot from the primer I can power through to wide open throttle, so I figured I was running lean. Also once I got past 50% throttle, if i went back down it would stall out again. I took the high speed carb adjustment screw out from 1 full turn to 3 full turns in half turn increments, testing the ski each time. Nothing seemed to help. I also tried bringing the low speed screw out half a turn but that did nothing as expected.
It may be worth noting, that when the ski is on land with the garden hose hooked up, it does not stall out.
One thing I noticed is that there is some air in the fuel lines when I look at them, is this normal?
I'm on my way to buy new fuel filters now, but I don't think that's going to fix my problem, it happens at such a consistent throttle level, and only at that level.
Should add that I checked spark plugs and they're basically brand new.
Based on some advice I took the boots off the spark plug cables, and the wire didn't look too bad, but I cut some back anyway to expose some brand new looking wire. Took it out the first time after forgetting to reset the carb. The problem seemed to be slightly better (although it could be my mind playing tricks on me). I came back in and set the high speed adjustment screws where I found them (1 turn out) and went back out. The problem was basically the same. I came in again and opened the high speed adjustment screws another full turn. This did not seem to help much either.
FWIW, it seems that the stalling happens right when you would be switching from the throttle controlled by the low speed adjustment screws to the high speed adjustment screws (around 40%). I have no idea if this means anything. I'm pretty new to 2 stroke engines.
Any insight you could provide would be greatly appreciated.
Thanks in advance!
-Dan
