Export thread

Tried changing the fuel pump. But upon further inspection it looks like the fuel pump push rod is not moving in and out as I believe it should? Any idea what could be causing this? Plastic cam shaft end give out??

There is a lobe on the camshaft that works the shaft and and the fuel pump. This lobe has likely worn out. Camshaft will need to be replaced. This original camshaft gear was plastic. Deere required this for noise reduction. The replacement camshaft will have a steel gear.

txmowman said:

There is a lobe on the camshaft that works the shaft and and the fuel pump. This lobe has likely worn out. Camshaft will need to be replaced. This original camshaft gear was plastic. Deere required this for noise reduction. The replacement camshaft will have a steel gear.

Click to expand...

Any pointers on a guide on how to complete this repair?

StarTech said:

https://www.mymowerparts.com/pdf/Ka...90V-FD611V-KAWASAKI-SERVICE-REPAIR-MANUAL.pdf

Click to expand...

Damn looks beyond my capabilities. Are their rebuilds available somewhere? Or a place to send mine in for rebuild?

Before jumping to conclusions manually test the pump this way. With the pump not mounted to the engine hook up the fuel line from the tank to the pump. Take a spare piece of fuel line and attach it to the outlet nozzle on the pump and the other end into a glass jar. Now holding tightly to the pump, rapidly push down on the actuating arm to work the pump. If the pump is working you should get fuel flowing into the jar. If fuel flows into the jar, remove the outlet line and hook the fuel line to the carb to the pump. Manually pump fuel into the carb. Now with the carb full of fuel, mount the pump on the engine, make sure the actuator arm is under the cam lob. You should feel the arm moving as you install and bolt the pump in place. The engine should now start and run until all fuel is emptied from the carb and the engine will stop. If the engine keeps running, you probably had the pump installed wrong, yes it has been done multiple times by experienced techs. If the engine stops, you are now looking at an internal problem.

Remove engine and it is a complete tear down. You will need a manual to remove/install the heads or it will blow out the head gaskets if did wrong.

You'll be money and time WAY ahead if you just find a cheap electric low-pressure fuel pump and install it so as to bypass the mechanical pump. You can place it almost anywhere between the fuel tank and the engine and you can splice the wiring into your ignition circuit. Leave the old mechanical pump (minus the fuel hoses) just where it is; it won't hurt a thing.