I think you misunderstood my intended sarcasm was self directed. the egg would be on MY face when I am wrong lol. but I did get you to prove that you are using a popoff gauge and not just reading what the pop should be from a book. I have tried to help people before and they are just feeding me info instead of facts they have verified. you just verified.
am I wrong in that you have pulled your extended pump and put in your friends stock setback pump? I thought that is what I read or at least that is how I took it. if so then havent you proved the setback is not it? and the 12/17 is perfect if not close enough for your ski.
Your understanding is close to correct. Because Brett set up the ski for a set back mag pump, it fits neither a standard driveshaft or a B1 driveshaft with the extra wear ring (poor mans setback for anyone reading this for the first time.)
I didn't want to cut up my buddy's drive shaft, so I trimmed down a spare I had that was already chopped up a little, I hacked it worse but got it to work. (I don't reccomend extending splines on a driveshaft by hand to anyone, altough i've done it twice.)
His factory aluminum 650 SJ impeller was beat to piss, so I decided to install my hack shaft with the 12/17 swirl impeller and reassemble my pump minus the extra wear ring. Thus I had a normal, non setback pump, albeit at touch closer to the intake than stock (3/4" or so). Nothing changed. I believe there are videos of it doing the same bog/ hesitation on here somewhere. I can't rememeber.
I was curious to try his impeller, but I didn't want to break down two pumps just to put his beat up impeller on my ski.
so that brings us back to the carb. why are you tuning the bottom jets when the bog is not at idle? you cant transition into the mid and top cause its too fat. I know those jets are what is normally run but you are relying on what is "normal" and not what the ski is telling you.
When I first cracked this carb open (engine built by GroupK, but running on a FX1 pump) it had a 130 pilot, 150 or 152 Main (I think) 1.5 N/S.
Starting at 130 and going down, i've tried everything down to a 112. Each time following the Carb tuning proceedures Harry and Watcon suggest in their tuning guides, turning down the LSS until it falls on its face then turning it back 1/4-1/2 turn to be just right. Throughout all of that I was unable to resolve the bog.
I also tried a 2.0 N/S, dropping the pop off from 32, to 24, and currently to 18psi. No change.
no sarcasm intended, Im trying to help you. I could be wrong. I probably am, but at least you will be thorough in your carb tuning and know for a fact its not it. and I understand the frustration of trying so many things and not getting anywhere. you are right I dont know all that you have tried but I know what I saw on the video and if it was my ski I would be idling it around with a fresh set of plugs for 5-10 minutes and then see what they look like. then adjust the low jet to get it correct. then you need to try to ride it 3/4 throttle for the same time, most likely less as it will be pretty obvious what is happening when you look at the plugs.
I haven't done this with the plugs... would the tuning guides mentioned above serve the same purpose or do you subscribe more to 'reading plugs'?
start with the pilot first as it contributes to the high speed circuit. high speed jet has no effect on pilot jetting. but if you have slightly too rich of a pilot and slightly too high a main- big bog.
again, I am not trying to be pushy and know it all, just trying to help. (so F U lol) that is a joke. cheer up you will get it.
Thanks, I went back and read what you wrote and I probably over reacted a little. Seems like you disagree with my proceedures/ findings/ ideas a lot in other posts so I snapped in this one. I'm just ready to get this b!tch running right so I can do some 'cool tricks cool tricks!'
