Animal Jet Size

[meracer9]

What is a good starting point on jet size for a stock walbro carb that is going to be running on alcohol on an animal?

Thanks

 

[Jimbo]

From the jet kit use a 137 main and a 38 pilot put the needle in the richest position.

 

[9sr]

How about for purple or blue plate? I have a couple of unknown carbs and I'd like to take them apart and be able to identify what they were set up for.

 

[9sr]

Also....what other differences should I look for? Is the float height set the same?

 

[alvin l nunley]

From the jet kit use a 137 main and a 38 pilot put the needle in the richest position.

can I ask what those numbers are, in inches.

 

[9sr]

.38mm / 25.4 = .015 in

 

[alvin l nunley]

.38mm / 25.4 = .015 in

I use to have trouble with metrics until i bought a calculator that does it for me.
I have it now, thank you.
isn't that a very small low side jet?

 

[9sr]

Maybe so....however, the stock gas jet is #32 or .0126 in.

 

[Qb29schmitty]

Does anybody know what the jets should be if I am going to run pump gas instead of alcohol? It's set up for alcohol now.

 

[Jimbo]

Main jet is .95 mm
Idle / pilot jet is .32 mm
Nozzle is .103"

 

[Qb29schmitty]

Thanks a bunch Jimbo!