I have Kolher Command 25hp in a Cub Cadet LT1050. I have an unusual problem and I'll add as much detail as I can here.
- When I bought the mower it had about 185 hours on it. I noticed the air/oil separator was cracked, didn稚 seem to impact function of the unit. Did have some occasional backfiring when shutting down, other than that Worked good all year.
- Next year (stored inside for a winter) changed oil, spark plugs, air filter, after a while about ス through the mowing season, the mower would act like it was running out of gas, looping and surging, after mowing for about an hour. I thought this was a fuel filter issue because the fuel filter was mostly empty when it happened. To troubleshoot the issue I致e done the following:
o Replaced Fuel/Oil separator, (valve cover breather) and gasket all air tight now
o Cleaned Carburetor, used Kolher carb rebuild kit, new gaskets and float etc. (Seemed to help overall running, but issue recurred)
o Replaced Pulse Fuel Pump, Air filter, Spark plugs
o Checked Fuel Solenoid Shut off Operation (seems to work good)
o Re-routed and replaced some of the fuel lines (seemed to help a little, no clue why)
o Relocated Fuel filter to under gas tank so it stays full. Replaced Fuel filter 3x, no real change.
o Ran with gas cap off, gas cap vent clear
o Ran multiple tanks of gas- not a fuel age issue
- So with all of this the only things I致e learned are, if I disconnect the fuel lines (like to change a filter, pump, or replace line) the situation seems to get better for at least an hour or 2 of cutting. I have no idea why though. Sometime when it starts to Surge and act like its out of gas, a little choke will keep it going for a few extra minutes, but it will eventually just die. I致e checked the bowl on the carb after it dies and it seems like there isn稚 enough fuel in it, but there is still enough in there that would make me think it should run (about 10-20 ml?). The carb is NOT hot when this issue happens, and it doesn稚 seem like the engine is over-heating. The engine usually starts and runs good prior to the 妬ssue although it does seem lately like it痴 lacking power for a 25 HP engine. I致e tried to look for intake or exhaust leaks, but don稚 have the proper tools to perform a leak down test. Any suggestions would be helpful. What is causing me a headache is that the issue will go away for a little while and then randomly return.
- When I bought the mower it had about 185 hours on it. I noticed the air/oil separator was cracked, didn稚 seem to impact function of the unit. Did have some occasional backfiring when shutting down, other than that Worked good all year.
- Next year (stored inside for a winter) changed oil, spark plugs, air filter, after a while about ス through the mowing season, the mower would act like it was running out of gas, looping and surging, after mowing for about an hour. I thought this was a fuel filter issue because the fuel filter was mostly empty when it happened. To troubleshoot the issue I致e done the following:
o Replaced Fuel/Oil separator, (valve cover breather) and gasket all air tight now
o Cleaned Carburetor, used Kolher carb rebuild kit, new gaskets and float etc. (Seemed to help overall running, but issue recurred)
o Replaced Pulse Fuel Pump, Air filter, Spark plugs
o Checked Fuel Solenoid Shut off Operation (seems to work good)
o Re-routed and replaced some of the fuel lines (seemed to help a little, no clue why)
o Relocated Fuel filter to under gas tank so it stays full. Replaced Fuel filter 3x, no real change.
o Ran with gas cap off, gas cap vent clear
o Ran multiple tanks of gas- not a fuel age issue
- So with all of this the only things I致e learned are, if I disconnect the fuel lines (like to change a filter, pump, or replace line) the situation seems to get better for at least an hour or 2 of cutting. I have no idea why though. Sometime when it starts to Surge and act like its out of gas, a little choke will keep it going for a few extra minutes, but it will eventually just die. I致e checked the bowl on the carb after it dies and it seems like there isn稚 enough fuel in it, but there is still enough in there that would make me think it should run (about 10-20 ml?). The carb is NOT hot when this issue happens, and it doesn稚 seem like the engine is over-heating. The engine usually starts and runs good prior to the 妬ssue although it does seem lately like it痴 lacking power for a 25 HP engine. I致e tried to look for intake or exhaust leaks, but don稚 have the proper tools to perform a leak down test. Any suggestions would be helpful. What is causing me a headache is that the issue will go away for a little while and then randomly return.