Super 55 carb adjustments

[Spikec65]

I have an '57 Oliver Super 55 with a Marvel Schebler carb. I got the Idle, timing and governor set correctly (I think, maybe not) and it starts right up and idles great but I'm having issues with going to full throttle, if I open it up very slowly I can get it to full speed but if I go too fast it coughs stumbles and dies. I know I'm missing something. Does anyone have any advice?

 

[J.Wondergem]

I have an '57 Oliver Super 55 with a Marvel Schebler carb. I got the Idle, timing and governor set correctly (I think, maybe not) and it starts right up and idles great but I'm having issues with going to full throttle, if I open it up very slowly I can get it to full speed but if I go too fast it coughs stumbles and dies. I know I'm missing something. Does anyone have any advice?

I don't know about to 55. Does it have the nob to increase the fuel flow, if it does, open it a little. If it has one it'll be at the bottom of the carb.

 

[Spikec65]

Thanks, I double checked, the Schebler only has 3 adjustment screws, idle speed, idle mixture and high speed load but your suggestion makes me wonder if I have the float set correctly and there's not enough fuel in the bowl for the demand, also I forgot to mention mine is a top main jet carb they also made a bottom jet version.

Thanks again

 

[GermantownGreen]

Thanks, I double checked, the Schebler only has 3 adjustment screws, idle speed, idle mixture and high speed load but your suggestion makes me wonder if I have the float set correctly and there's not enough fuel in the bowl for the demand, also I forgot to mention mine is a top main jet carb they also made a bottom jet version.

Thanks again

U need to watch Ross the Oliver man, on YouTube
Lots of carb info from him.
GG

 

[Spikec65]

U need to watch Ross the Oliver man, on YouTube
Lots of carb info from him.
GG

Thanks, I will!

 

[Mike(NEOhio)]

Usually stumbling on acceleration is the idle mixture is a little lean. On most MS carbs the mixture screw actually controls the air, not fuel, so turn it in to richen.

 

[Spikec65]

Usually stumbling on acceleration is the idle mixture is a little lean. On most MS carbs the mixture screw actually controls the air, not fuel, so turn it in to richen.

OK, that's easy enough, I'll try that first.
Thanks

 

[Spikec65]

Just a late follow up for anyone searching this issue, the magic adjustment was the high speed load. The carb rebuild instructions advised to close the HSL adjustment and open one turn but after digging into the service manual a little deeper I found an illustration that said open it 2 turns to start and adjust from there so I tried it and that took care of the majority of the issue (still need a little tweaking) Thanks for all the help!
Spike

 

[GermantownGreen]

Just a late follow up for anyone searching this issue, the magic adjustment was the high speed load. The carb rebuild instructions advised to close the HSL adjustment and open one turn but after digging into the service manual a little deeper I found an illustration that said open it 2 turns to start and adjust from there so I tried it and that took care of the majority of the issue (still need a little tweaking) Thanks for all the help!
Spike

Congrats for keeping up with your project to get success. Thanks for sharing your thoughts. GG