single carb tuning

[sjetrider]

Yeah, should be a cake walk right? I have never tuned a single carb boat. Here is the set up.
Ported Cylender 61X
Ported cases 61X
Cofmans pipe
modded cdi
I-prop
single 46mm wetjet carb 2.5 n/s I think a 95g spring 125 pilot, 150 main
wetjet intake mnfld

Is this a good place to start? :dunno:

Thanks for your input

Brian

 

[Mike W]

Yeah, should be a cake walk right? I have never tuned a single carb boat. Here is the set up.
Ported Cylender 61X
Ported cases 61X
Cofmans pipe
modded cdi
I-prop
single 46mm wetjet carb 2.5 n/s I think a 95g spring 125 pilot, 150 main
wetjet intake mnfld

Is this a good place to start? :dunno:

Thanks for your input

Brian

Hey Brian. I assume this is a single carb setup on a 62T? It looks like a good starting point but all I have ever tuned was 61X motors w/ 44's.
The ski I just bought I will be doing the same mod so let me know what you come up with.:biggthumpup:

 

[Idok]

you will probably end up right around:

140m
120P

1 turn out apiece...

 

[waterfreak]

Yeah, should be a cake walk right? I have never tuned a single carb boat. Here is the set up.
Ported Cylender 61X
Ported cases 61X
Cofmans pipe
modded cdi
I-prop
single 46mm wetjet carb 2.5 n/s I think a 95g spring 125 pilot, 150 main
wetjet intake mnfld

Is this a good place to start? :dunno:

Thanks for your input

Brian

you sound way too rich!! try 2.0 with 115 gm (about 32 psi) maim 135 low 125. 1 turn on each (l&H) that's the setting I use on my 48mm carbs and there right on the money everytime, even with a 62t big bore lamey:biggthumpup:

 

[Idok]

you sound way too rich!! try 2.0 with 115 gm (about 32 psi) maim 135 low 125. 1 turn on each (l&H) that's the setting I use on my 48mm carbs and there right on the money everytime, even with a 62t big bore lamey:biggthumpup:

steves #'s were right on the ball for me as well.....

mine was a 82mm LPW 61x top and bottom with single 48

 

[keefer]

Use that 1.8 N/S you bought with the 95, 80, or 65 gram spring and get that pop off to about 30 or 32 like waterfreak said. I prolly have 80 and 65 gram springs if you need one.

 

[Mike W]

I just saw where its a 61X...oops

 

[sjetrider]

you will probably end up right around:

140m
120P

1 turn out apiece...

WOW, I think I need to go up from 125 / 150. It seems lean here.

 

[sjetrider]

I test rode the other day and found that it seams lean. It hesitates then hits hard from idle and from mid range and it got a little better as I came out on pilot screw to 2.25 turns, but then quit getting better. I was thinking I needed to go up on pilot???? Adjusting main seemed to do nothing.
This is w/ the set up in my original post. It seems like I need to go bigger on pilot but all suggestions above were for smaller jets and higher pop off.

 

[accbr]

I have the same cylinder and cases with a Coffman sizzler pipe. I ported the cylinder with the Race Logic templates. I have a single 44 on a stock intake. I ended up with 145 Main, 120 Pilot, 95g spring, 2.0 N/S from some recommendations on here. Started with the screws at 1 turn out each and tuned from there. I think I ended up around 1.5 turns out each. I'm still breaking the motor in so I haven't had any long WOT runs on it yet. It seems to run good.