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lkthoma · #1 08-26-2011, 12:20 AM

Hello,
I have a Scag Tiger Cub Model STC48V-23CV. The Kohler Command series engine is giving me an issue starting after it has set a day or so. It will crank and some times attempt to fire for a half second if you adjust the choke. After that attempt to fire, it wont try again. If you pull out the heavy duty air filters and give it a shot of Carb cleaner or ether, it will start and run. While running there is no loss of power from normal, and no misses, rough running or idling.

Thanks in advance for any advice.

dahammer · #2 08-26-2011, 12:54 AM

It's not getting fuel, investigate why. Could be the fuel pump, clogged filter or etc.

dahammer · #3 08-26-2011, 12:59 AM

I believe this is the service manual for the engine on it. Check section 5

http://www.kohlerengines.com/onlinec.../tp_2450_c.pdf

StihlMechanic · #4 08-26-2011, 01:04 AM

If it starts and then runs on starting fluid, I would suspect the choke cable or linkage is the problem. If it starts up but dies with starter fluid then you more than likely have a fuel system issue.

dahammer · #5 08-26-2011, 01:09 AM

Wait, yeah... It doesn't die after the shot of starting fluid or it does?

lkthoma · #6 08-26-2011, 01:30 AM

Nope doesnt die after the shot of starting fluid.

Mtnmn · #7 08-26-2011, 01:42 AM

Pull the fuel line at the carb. and put the line in suitable container, and give it a shot gas thru the carb. Get it to run a few seconds, see if fuel pump is working. With a squirt bottle of gas giving it a squeeze when it begins stall you should be able to keep it running for several minutes. If you get fuel in the container pump is working. then it looks like carb. problem. May be stuck float in closed position. I would strongly recommend not using starting fluid or either, one day it will cause a BIG problem.

lkthoma · #8 08-26-2011, 07:09 AM

I will try disconnecting the fuel line from the carb. and report back later today...

Thanks for everyone's help.

dahammer · #9 08-26-2011, 08:50 AM

If it doesn't die, then it's getting fuel, so I agree with StihlMechanic, it's probably an issue with the choke. Could also be a badly clogged air filter, which would cut off the air supply like the choke. But if you put the filter back in after you get it running and it continues to run fine, that's not the problem either.

lkthoma · #10 08-26-2011, 09:33 AM

Quote:

Originally Posted by dahammer

If it doesn't die, then it's getting fuel, so I agree with StihlMechanic, it's probably an issue with the choke. Could also be a badly clogged air filter, which would cut off the air supply like the choke. But if you put the filter back in after you get it running and it continues to run fine, that's not the problem either.

The air filter wasn't clogged when I pulled it and used a shot of carb cleaner to get it running. I'll start down the line
of checking the choke.