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Kohler Command 16 Not Running

#1

A

abip43

Good Morning!

I have a Kohler Command 16 on a Craftsman riding mower, the Kohler info has been wiped off the sticker so I don't have much information. It first started that it would run and shut down like it was starving for fuel. I replaced the fuel filter & carburetor. Now it runs at what seems to be half throttle and makes some noise as it runs. I took the valve cover gasket off, rockers are tight, rods are not bent, but it seems when its running both valves are opening and closing at the same time. Compression gets upto about 90psi and drops almost immediately when I stop cranking. Also, I put a new plug in, after a minute or two of running the plug is completely black with pretty thick build up.


#2

tom3

tom3

First guess would be the choke is not opening? Then maybe the carb float needle valve is not sealing and letting the carb flood the engine. Black fouled plugs on a cold engine would point me toward a carb problem.


#3

M

mkillian

Did you check the fuel line coming out of the tank? I found tons of gunk in my tank. The filter actually holds a lot of gas so you can't always tell if the line is clear if you check it downstream. You could try replacing the fuel pump too, they are very cheap and easy to replace.
If the plug is turning black you might want to make sure the valve seals are ok. It's a pain but my engine had that problem. You could need to do a valve job. I would check the fuel lines first and I would also check the coils for spark just in case.


#4

M

mechanic mark

POST CRAFTSMAN MODEL NUMBER FROM UNDER SEAT

https://www.searspartsdirect.com/mo...man-917272059-front-engine-lawn-tractor-parts

https://www.searspartsdirect.com/ma...craftsman-917272059-front-engine-lawn-tractor

see page 28 in owners manual


#5

A

abip43

mkillian said:
Did you check the fuel line coming out of the tank? I found tons of gunk in my tank. The filter actually holds a lot of gas so you can't always tell if the line is clear if you check it downstream. You could try replacing the fuel pump too, they are very cheap and easy to replace.
If the plug is turning black you might want to make sure the valve seals are ok. It's a pain but my engine had that problem. You could need to do a valve job. I would check the fuel lines first and I would also check the coils for spark just in case.
Click to expand...

Thanks for responding- Fuel Line is clean, new fuel filter in line. There is no pump, gravity fed system. I have spark, maybe not enough?


#6

A

abip43

mechanic mark said:
POST CRAFTSMAN MODEL NUMBER FROM UNDER SEAT
Click to expand...



Craftsman Model 917.272059.
SN- 060702D008652

Kohler Command 16HP OHV - sticker is completely wiped off ?


#7

A

abip43

Watching the valves, the exhaust valve opens right after the intake valve closes, finishes cycle and then opens again during exhaust stroke. . . . .

I got the Model # of the motor finally from Sear - Kohler CV460-26509


#8

PTmowerMech

PTmowerMech

abip43 said:
Good Morning!

I have a Kohler Command 16 on a Craftsman riding mower, the Kohler info has been wiped off the sticker so I don't have much information. It first started that it would run and shut down like it was starving for fuel. I replaced the fuel filter & carburetor. Now it runs at what seems to be half throttle and makes some noise as it runs. I took the valve cover gasket off, rockers are tight, rods are not bent, but it seems when its running both valves are opening and closing at the same time. Compression gets upto about 90psi and drops almost immediately when I stop cranking. Also, I put a new plug in, after a minute or two of running the plug is completely black with pretty thick build up.
Click to expand...

Does your mower have a manual choke?


#9

A

abip43

PTmowerMech said:
Does your mower have a manual choke?
Click to expand...
Throttle cable pushed all the way up chokes it


#10

M

mechanic mark

https://www.searspartsdirect.com/ma...craftsman-917272059-front-engine-lawn-tractor

See page 28 troubleshooting.


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