The Green Industry's Resource Center

MowerMinister · #1 02-11-2013, 08:57 AM

Hello All,
I have a Hustler 60" mower fitted with a Kawasaki FH680V CS20 engine. Recently, the carburetor jet valve finally reached its breaking point. This allowed fuel to enter the cylinders overnight where it eventually seeped into the crankcase and ruined the oil. Because of the overflow, it blew the lower main seal. In removing the crankcase cover to replace the seals and gaskets, I've run into some trouble with that governor assembly. Fortunately this engine has a metal camshaft instead of the infamous plactic gears. However I can't for the life of me get the governor forks to fit properly onto the camshaft governor assembly. Does anyone know of a trick to assembling this puppy? I've been trying everything I can think of to get it in and I just cant figure it out. Any advice/ ideas will be helpful.

Thanks in advance!

dutch1 · #2 02-11-2013, 10:42 AM

When installing the pan to the engine block, make sure that you hold the governor arm and turn the governor arm clockwise to hold it in position over the camshaft/thrust washer until you have the pan installed--in other words, make sure the governor arm fork will slip down and engage the washer at installation. You can usually tell how far in or out(of the pan) the governor arm needs to be by noting the wear area on the governor arm.

As I understand your question, this is the problem you're experiencing. If I'm incorrect in the clockwise position of the governor arm, the big boys will jump right in to correct me.

Landrus2 · #3 02-11-2013, 10:59 AM

http://www.parish-supply.com/documents/574.pdf

teckjohn · #4 02-11-2013, 11:06 AM

you turn it clockwise. But you will not get the cover to go on until you loosen the rockers under the valve cover to release pressure from the valves to the cam. The cam moves when the valves push on it. Once you release the cam so it moves freely then you can put the cover on. You have to move the cover turning it left and right to get the gears to align w the oil pump. Then it will drop down and make sure the cam is in position then you line up your dowels. you might have to spin the crank to get it to go all the way down. never beat it on.

dutch1 · #5 02-11-2013, 11:58 AM

Good follow up on the cam alignment/valve pressure on cam, TJ. It's been a while since this old man has had one torn down.

MowerMinister · #6 02-11-2013, 12:03 PM

Thanks Everyone! I was under the impression that the forks had to go between the thrust washer and the plate that holds the steel balls in place. I realize now that the governor arm spring is responsible for keeping the forks up against the bottom side of that washer. Also, it was definitely helpful to remove the valve rockers to take tension off the cam. I had already done that but its good to know that someone else out there recognizes that this actually helps save time even though it seems like extra work. Thanks again, for the tips and the quick responses! All were very helpful.