jet vs orifice plug

[walterramjet]

whats the difference between a jet and an orifice plug?

thanks,

Walt

 

[kbait]

Re: jet vs orifice plug

A carb jet meter's the fuel to the carb's throat for fuel to run the motor. A fixed jet is just a hole in a brass plug to let one certain stream of gas through.. a metered jet lets you adjust how much fuel goes through by use of an adjustment knob. An orifice plug is just a plug over a hole..

 

[viciousfishes]

Re: jet vs orifice plug

If your talking about one of the older johnsons... some of the carberators had a high speed oriface INSTEAD of a highspeed needle valve. While the hight speed needle valve is adjustable, the oriface isnt. However, you can get different sized orifices for different applications.

Hope this helps

 

[F_R]

Re: jet vs orifice plug

jet, orifice, call it whatever you want. All the same thing, a means of metering the amount of fuel entering the airstream. OMC calls it an orifice plug.

 

[74]

Re: jet vs orifice plug

I'm rebuilding the carbs on my Johnson 50esl71s... without removing it, I noticed the orifice plug looked a bit chewed up on the one carb. Almost like somebody tried to remove it and snarfed it up, or snarfed it upon replacement.) I'm still waiting on my rebuild kits, but decided to blow a little deep creep through the orifice plug and then some air. Little bits of green came out. Should I attempt to remove the orifice plug and replace it? Also, do I need to remove the 2 core plugs during the rebuild (0307542 CORE PLUG / 0306442 CORE PLUG?) Sorry if these questions are stupid, but this is my 1st carb rebuild.