99gsx limited accelerator pump

[Rabid]

Does my ski have that jet in the line leading into the accelerator pump. The line was missing when I got the ski.

 

[MacAddict]

Yes.... all models of the 951 Super BNi 38 carbs with accelerator pump had the in line restrict or needed to prevent overdosing the carb with fuel. I rejetted mine and deleted the accelerator pump after so many problems .... was only after I got rid of acc pump that I realized there's supposed to be in line restrictor

 

[Rabid]

Will this cause a low end bog if missing?

 

[MacAddict]

Absolutely. ... that's what I was fighting with my 2001 XP, as I surf jump all the time, and constantly gunning it again and again as I cleared waves, it would bog like a bitch when I would get on it with the next landing. I even put smaller 65 jets in and it still bogged..... happier now with it rejetted up and deleted acc pump with PROKs, but definitely understand the need that for that restrictor to avoid too much fuel being delivered. ..

 

[Rabid]

Thank you... I have been chasing this low end bog for a while now. I have cleaned the carbs 4 times. I was going to look into maybe a air leak somewhere. I will jess/nick a call to see if they have one.
I had checked the carb diagram and it doesn't show it but they keep talking about the restrictor on the duel carbs.

One other thing do I need to put sealant on carb intake gaskets? I have not putting anything on them

 

[mikidymac]

Yes.... all models of the 951 Super BNi 38 carbs with accelerator pump had the in line restrict or needed to prevent overdosing the carb with fuel. I rejetted mine and deleted the accelerator pump after so many problems .... was only after I got rid of acc pump that I realized there's supposed to be in line restrictor

The 951 has 46mm carbs not 38.
But yes a non working accelerator pump will cause a bad bog off idle.
They work great when it is functioning.

Also I would never recommend aftermarket air cleaners on any 951 unless you are a very experienced rider and never let anyone else ride it. A 951 will not tolerate any water ingestion and the stock air box helps this.

 

[MacAddict]

Some people do use spray gasket or Threcebond 1211 on the carb gaskets, but what I personally do is smear a bit of synthetic non conductive grease on both sides of the gasket before assembly.... tends to seal things up pretty well.....

But the schematic for these dual carbs shows #83 as the jet... right before the accelerator pump.... Again, this is taken from my 2001 XP 951... but what I have found is that even my 2001 GTi with single 38 uses a restrictor.... or well it should have one, which it doesn't.... so I am looking for one there as well.....

 

[Rabid]

So Does the 46bn have the restrictor in the line?

 

[Rabid]

BN46I-42, this is the carb I have in the ski

 

[MacAddict]

The 951 has 46mm carbs not 38.

Sorry.. you are right.... was thinking of my GTi that needs the restrictor.... too many conversations between here and the numerous FB groups I try to help with..... LOL

 

[MacAddict]

BN46I-42, this is the carb I have in the ski

Yes... same as my 2001 XP... needs restrictor #83 as posted.....

 

[Rabid]

I wonder how many people chase low end bogs and don't realize that they are missing this part. If you look on the schematic its not showing a #83.

The grease on the gasket makes sense if you need to take it off multiple times like I have been. Good tip

What's interesting is that a lot of times I find the info I need to look into by reading a thread that is not what I was looking into but some one posts a interesting point within the thread.

Point is read as much as you can.

 

[MacAddict]

I wonder how many people chase low end bogs and don't realize that they are missing this part. If you look on the schematic its not showing a #83.

I'll be damned.... you're right... the parts catalog doesn't show it... I just checked on sea doo manuals [dot] net... everything else is the same to my 2001 XP diagram ..... I wonder if this was an addition when they realized too much fuel was getting in and causing bog....


2001 XP left, 1999 GSX right...

 

[Rabid]

What was your original jetting on the carb. I think the low on mine is a 75. I wonder if they jetted it out

 

[MacAddict]

What was your original jetting on the carb. I think the low on mine is a 75. I wonder if they jetted it out

No.. that sounds right... I went down to 60s trying to get rid of bog.... but now that i have deleted and went aftermarket air intakes I went 85 lows.... and jumping to 90 lows now as I need a little more umppphhh out of the hole....

 

[Rabid]

I just did some research and 1998 has it and 2000 models with duels has it but not the 99 ... Are they all the same jet or are they different sizes?

 

[Rabid]

Is there any 99 gsx limited owners that know for sure that they have the restrictor on their ski?

 

[MacAddict]

I just did some research and 1998 has it and 2000 models with duels has it but not the 99 ... Are they all the same jet or are they different sizes?

FWIW: I just checked and stock jets on my 2001 951 are 75 lows and 162.5 highs.... and I looked at the ones I took out/replaced, and they were correct.... but as mentioned, I went all the way down to a 60 on the lows trying to fight the bog....

 

[Rabid]

I'm going to find the same restrictor as your ski and try that one. Thanks for all the help.

If that doesn't work I will try rejetting

I don't have much experience with that bout you gave me a good starting point.

 

[mikidymac]

My guess is that the parts diagram is wrong for 1999 and omitted the leak jet.

Every one I have seen with the accelerator pump uses the restrictor jet.

1999 to 2002 uses the exact same jetting and pump but the 2000+ diagrams all show the restrictor jet.

 

[Rabid]

I have one ordered

 

[Rabid]

When the restrictor arrives do I just push into the line and which end do I insert it?

 

[dieselndoo]

Insert from line going to excel from the fitting off the bottom of the carb... You'll want the bigger end(restrictor) facing the carb... You sure your not confusing a "bog" with "lean"

 

[mikidymac]

Without the accelerator pump working it will be lean and have a bad flat spot off idle.

 

[Rabid]

... You sure your not confusing a "bog" with "lean"

That is an excellent question...I have been wrestling with that thought for a while. I have cleaned the carbs 4 times and checked the pop off every time. The last time I did I replaced the springs because I would get 25 psi then three 21s. Now I get three 21s. I originally had an issue with the check valve in the acc pump being stuck but I got it cleaned out. I blew the crap out of the three little holes in the throat. This restrictor has been bugging me for a while since I rebuilt the carbs and I would come across a comment about them here and there. If anything it will remove a variable.

I am interested to see what will the result be when I add the restrictor and add some sort of sealant to the carb intake gasket. I'm in too deep to give up.