john deere lt 150 garden tractor

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  #1  
Old 07-20-08, 11:33 AM
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john deere lt 150 garden tractor

mower will not start, back fires only, checked fuel flow -OK, spark plug good. do i need to replace the carb. need help, thanks
 
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Old 07-20-08, 07:08 PM
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We need something to work with, like: What brand engine? What model engine? How do you know the plug is good? What events led to this?
 
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Old 07-20-08, 07:25 PM
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Parts breakdown shows that it should have a Kohler command engine. Let us know if this is correct, and post a model and spec number if you can.

I would check for a sheared flywheel key, I have run across this several times on command engines.
 
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Old 07-21-08, 03:36 PM
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Originally Posted by offset49 View Post
mower will not start, back fires only, checked fuel flow -OK, spark plug good. do i need to replace the carb. need help, thanks
ok, john deere LT 155 with 15 hp kohler engine, came from estate sale. they told me mower ran great until it ran out of gas and they put in k1 insead of gas. as soon as they could k1 was drained and replased with gas. i bought mower for parts but was hoping to get it running. this problem is a week old,not like it sat for weeks like this.
new plug was warm, came from my LT 155 that was running fine.
 
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Old 07-21-08, 04:02 PM
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Exposure to K1 should have no long term effects. Since it was out of gas when the engine stopped, the carb is got filled with K1 or a mixture of K1 and gas when they tried to restart it. It's not going to run until that's out of the carb, and my guess is that they didn't do anything to get it out.

You could disassemble the carb to get the K1 out, but it might be easier to just pour a little gas in the throat of the carb to see if it'll run long enough to clear out the K1. You may have to do it several times.
 
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Old 07-21-08, 05:22 PM
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john deere LT 150 KOHLER 15 HP
model CV 15s
spec PS-41618
 
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Old 07-21-08, 05:27 PM
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I would try priming engine as roger suggested. If you still only get a loud bang or backfire, then I would remove the flywheel and inspect the flywheel key.
 
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Old 07-21-08, 08:19 PM
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I agree... I'd take the bowl off the carb, drain it, and make sure that gas is what is coming through the fuel line to the carb, not K1. If not, drain the fuel lines until gas is coming out, then put the bowl back on and crank it up.
 
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