slide carb selection

[xspike77x]

which round slide carb size would fit a 5hp B&S flatty the best? 19, 20, or 22mm? I know that the 22mm fits a 6.5HP clone very well, so my guess would be the 19 or 20mm, but does anyone know for sure which of the three would work the best?

 

[DeltekMania]

I'd say a 22mm to 20mm. Just measure the diameter on the intake that will tell you.

 

[xspike77x]

If I measured correctly, looks like the 22mm is the winner.

 

[minidragbike]

22-23mm is the size of the stock intake seat I.D. of a gx200/Clone
But for a briggs the intake seat is bigger. It's about a 24mm I.D, which means the motor can benifit from a slightly bigger carb.

 

[Cr@zyD@ve]

Depends on what you want to do, stock or build it up?

Im running an old 19mm carb on a Briggs flathead 5. I opened the port up slightly so everything matches smooth. With a stock cam you will have throttle responce up to about 1/2 way open throttle. Open the throttle fully doesnt change much because the cam lift limits the flow thru the carb. The 22mm carbs are very available and will work ok.

 

[gokart95]

22mm tilitson are the best carburators out there if your looking at 1 I will PM you instructions on how to clean them after every race.

 

[minidragbike]

If your running gasoline you don't have to clean them. Only when running alky and letting them sit for long periods of time is when you have a problem.