Carburator holder rubber plugs

[Hawkeye]

are the barbs on the carburator holders suppose to suck air as I should think or blow air? The rubber plugs keep flying off on a seemingly good running motor. As soon as the plugs pop off it starts missing as expected. Just can't figure out why? Is this a common problem? Help!

 

[I am Carbon]

Hi hawkeye I used to carry extras with me in my pocket, still might have some in tool bag.
Anyway I use small zipties no problems now

 

[Hawkeye]

Ok Carbon, so they blow rather than suck? My God they flew thirty feet! Youre saying just bind them on? Will give it a try. Thanx!

 

[I am Carbon]

the barbs blow and suck
yes bind them on
I'm happy that I took a pic I see this one is cracked

 

[Hawkeye]

Hey thanx! You've been a great help. I was beginning to think something was wrong.

 

[angus67]

If its doing it a lot, your carbs might need a sync.
You can also just use one long vacuum line to join the two. That way, you wont lose caps. Helps idle smoother, too.

 

[gggGary]

Those cheap auto store rubber caps soon crack and fail. I prefer a bit of tygon vacuum line plugged with a small screw and yes they need to be wired or clamped in place especially if you still are running with a points ignition.

 

[retiredgentleman]

I concur with Gary. Those auto store rubber caps are complete junk, and soon crack causing the engine to run badly. I use a length of fuel line hose to join the 2 barbs. I use small "Jubillee" clamps as well. The fuel line is tough as nails and will last for many, many years.