Home › Forum › Ask A Member › 1974 Evinrude 9.9 won’t idle at low RPMs, need help › Re: 1974 Evinrude 9.9 won’t idle at low RPMs, need help
That thing that is circled is the low speed needle valve seal. Not all kits have this. The nylon bearing thingy, which not all kits have, goes over the pointy end of the low speed needle valve. Because there is a long distance from where the threads end to the tapered end the bearing guide keeps the tapered part centered in the low speed needle seat. Without this the pointy end would or might orbit around the inside of the needle seat instead of staying centered while adjusting. This would or could cause large swings in mixture with a slight adjustment rotation.
Buy the oem kit, it has everything one needs, including that needle seal.