Can anyone tell me how to check the pop off pressure of a carburetor inlet needle. How do i connect to carb and what pressure for a walbro wa carb with fixed main jet and adjustable idle jet. Can you make a pressure tester. If so how do i make one.Thanks
carb pop off pressure
- Thread starter Navara
- Start date
Help Support Arborist Forum:
NevadaWalrus
ArboristSite Operative
Basically any hand operated pressure pump can be used. Need a guage that reads low pressure 0-10, 0-20. something along those lines. You connect it the the inlet nipple on the carb.
Roughly 5-7 psi is what you want to check for. Newer units are using higher fuel tank vent pressures so on newer model you want to push that carb pressure to 7 or 8 psi. Should hold pressure indefinantly.
Most manufactures have pressure testers available through their part/tools catalogue, Mighty Mite vacuum tester has a model that both test pressure and vacuum or convert a vacuum only to do both. They are available through most tool trucks and many tool stores. Personally I like the Mighty Mite because its versatile, not limited to just pressure checking as the OEM testers are. When pressure checking 2 cycle crank cases you need to do both pressure and vacuum test because the crank seals need to be checked both ways. If you're doing 2 cycle repairs the extra cost of the Might Mite is well worth the cost.
Roughly 5-7 psi is what you want to check for. Newer units are using higher fuel tank vent pressures so on newer model you want to push that carb pressure to 7 or 8 psi. Should hold pressure indefinantly.
Most manufactures have pressure testers available through their part/tools catalogue, Mighty Mite vacuum tester has a model that both test pressure and vacuum or convert a vacuum only to do both. They are available through most tool trucks and many tool stores. Personally I like the Mighty Mite because its versatile, not limited to just pressure checking as the OEM testers are. When pressure checking 2 cycle crank cases you need to do both pressure and vacuum test because the crank seals need to be checked both ways. If you're doing 2 cycle repairs the extra cost of the Might Mite is well worth the cost.
jokers
Addicted to ArboristSite
Good post Nevada,
You can get the cheap Mighty Mite at Walmart for about $20 I believe. The all inclusive kit can be bought at NAPA and many places on-line for around $60 last time I looked which was a couple of years ago.
Russ
You can get the cheap Mighty Mite at Walmart for about $20 I believe. The all inclusive kit can be bought at NAPA and many places on-line for around $60 last time I looked which was a couple of years ago.
Russ
