oneshort 5 #1 Posted 23 hours ago Guys,is there a tiny hole in this acceleration valve and if so WHERE?? Thanks Share this post Link to post Share on other sites
Pullstart 69,552 #2 Posted 11 hours ago What tractor is that out of? It might help with details of the part. Share this post Link to post Share on other sites
953 nut 65,034 #3 Posted 9 hours ago That appears to be the cap that retains the acceleration valve on a Sundstrand, I do not think it has any penetration to the outside. Our subject matter expert on Sundstrand is @daveoman1966, he should be able to answer this. Share this post Link to post Share on other sites
Handy Don 16,212 #4 Posted 8 hours ago An acceleration valve would not have any exposure to atmospheric pressure (i.e. an “outside” opening). Its operation relies on the differences between two internal pressures, and a spring. Small engine, float-bowl carburetors do have a “vent” to prevent a buildup of air pressure in the bowl from affecting the carefully metered delivery of fuel to the throat. Share this post Link to post Share on other sites
pfrederi 20,194 #5 Posted 6 hours ago No hole in the end cap. There are holes in the internal valve sleeves especially in piston to piston units 1 Share this post Link to post Share on other sites
