Engine primer

Not much to overhauling the engine primer, but you'll need to have on hand two O-rings of the correct size (Kohler takes a -12 O-ring) and a very small amount of fuel lube grease (EZ Turn).

First, unscrew the locknut and pull the plunger out of the barrell (Photo 1).  Remove the old O-rings from the plunger...they may just fall off if they're more than 15 years old.  Examine the inside of the barrell for any dirt, crud, or scratches.

Apply a light coat of special grease to the new O-rings and to the end of the plunger (Photo 2)  Roll one O-ring into the first groove, the roll the second O-ring over the first and into the second groove.

Finally, grease the plunger and barrell good and reassemble.  (Photo 4) Test the unit.  If there's any problems, remove the check valve springs and balls (under the two screw covers on the end of the primer) and clean and lube them.