Review on Stens 615-522 OEM Carburetor Kit - Zama RB-71 Replacement by Junee Mauck

The kit is complete and works well. You have to be very, very careful when cleaning the carburetor body and the plastic diaphragm that attaches to the carburetor. All resin fuels must be cleaned. I recommend soaking parts in diesel/kerosene for at least 24 hours before assembly. Then use carburetor cleaner very generously and finally clean thoroughly with an air jet. If you've done a thorough repair and also replaced/verified that ALL the fuel lines are fully intact and the rubber grommet that seals the fuel lines through the gas tank is doing its job and you're frustrated because you're still having a squirt/spinning issue /not idling, you have an air/fuel screw adjustment problem. If you have small plastic caps on the air/fuel propeller that limit its stroke and cannot perform well inside these caps, they will need to be removed. From there, you're just a few test runs away from perfecting it. This will bring almost all chainsaws, herbivores, cultivators equipped with this carburetor / variations of this carburetor back to life.