12-559-02-S Fuel Pump Kit for Kohler CH11-CH16 CV11-CV16 CH410 11-16 HP Engine Replace OE 12 559 01-S 12 559 02-S

This is a perfect replacement for my Ford New Holland Kohler fuel pump. Things to be careful about are as follows:The bolts supplied felt like the wrong size, maybe metric? or self tappers? when I tried to thread them in, there was noticeable resistance. Not sure why, but I didn’t use them. If they won’t go in using zero effort with your fingers, don’t use them. Strip the holes and you are done! The big C-clip to press in the sides of the retainer that holds the 2 inlets to the pump won’t work unless you have a pair of pliers made for it. Just use a short drywall screw to press one side in far enough to get the inlet started and you can press it in the rest of the way. Make sure you oil them first so the rubber ring isn’t dry. And make sure any angled inlet is pointing the way it needs to point before locking it in. Getting it out if you mess up might be a chore. You should NOT need the paper gasket or the steel spacer unless the length of the pump arm is wrong. Measure carefully. If new length matches old length, you are good to go without that spacer. And without the gasket. Use the rubber insert for sealing the pump to the block. Cut new hoses ahead of time and have them on before you reinstall. You may have to make sure the upper hose is attached to the actual fuel line going to carb first. Otherwise, it may be impossible to get it on with pump installed without removing top engine cover. Make sure the mating surface is clean. I had to use a utility knife blade to clean of the rock hard old gasket. Lastly, don’t overtighten. Torque is only about 4 lbs. Just snug it up slightly and call it good. The old bolts work just fine.Lastly, and this is the tricky part, the pump arm actually goes behind a cam lobe on a vertical shaft within the engine. You may get lucky and the pump sets nice and flush before you start tightening it up, or you may notice the pump is quite far away from the block when you go to reinstall. You can rotate the motor by hand from the top until that shaft has turned enough that the pump is almost flush to the mounting surface. This will put less stress on the pump housing and your nerves when you go to tighten things down. A flashlight is handy to get a view of that cam lobe and see kind of where its at.And the mower fired right up! Problem solved. Now it just remains to be seen how long this new part lasts! I doubt it will give me 20 years like the old part did!