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Old 06-07-2010, 05:11 PM   post #1 of 19
jimolan
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Default Bogging down after a few laps

I just purchased a JD 170 in great shape and have already washed, clayed, polished and waxed it. It is a beautiful tractor. I am having an issue keeping it running. It works great for the first few rounds of my lawn, but soon it bogs down and I cannot engage the PTO again without it bogging down. He lives in my neighborhood, so I got my wife to drop me off and I drove it home, about 1/4 mile or so. When I started cutting grass though it bogged down. The guy that sold it to me replaced the fuel cutoff solenoid (M122917). After that is started, but it still bogs down. It will run rough with the choke on. Any ideas on what to do??? The guy at Trigreen thought it might be the coil... I want to cut some grass.
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Old 06-07-2010, 05:24 PM   post #2 of 19
rattosh51
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Default Re: Bogging down after a few laps

Sounds like it needs a good carb cleaning...
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Old 06-07-2010, 09:25 PM   post #3 of 19
jimolan
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Default Re: Bogging down after a few laps

Are you talking about an off the tractor cleaning or is there something simpler without having to dismantle the carb???
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Old 06-07-2010, 09:50 PM   post #4 of 19
eddyyy302
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Default Re: Bogging down after a few laps

Throw a spark checker on it and run it, when it bogs down watch the light, if the spark is not constant it is either the ignitor or the coil, both $$$. Buy them on epay and save the bucks.

Dan
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Old 06-07-2010, 10:30 PM   post #5 of 19
jimolan
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Default Re: Bogging down after a few laps

I see the coil on the parts page at jdparts, but what about the ignitor? Does it have another name or where is it?
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Old 06-07-2010, 10:35 PM   post #6 of 19
eddyyy302
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Default Re: Bogging down after a few laps

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Originally Posted by jimolan View Post
I see the coil on the parts page at jdparts, but what about the ignitor? Does it have another name or where is it?


Part #2, listed as module and listed as Igniter in the comments.

Dan
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Old 06-07-2010, 10:56 PM   post #7 of 19
jimolan
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Default Re: Bogging down after a few laps

Thanx, I went back and slowed down and looked more careful and found it.
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Old 06-08-2010, 04:49 AM   post #8 of 19
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Default Re: Bogging down after a few laps

Run some SeaFoam in the gas for the carb before tearing it down. slkpk
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Old 06-13-2010, 12:36 PM   post #9 of 19
jimolan
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Default Re: Bogging down after a few laps

Bought an inline ignition spark tester and found the coil/ignitor to be good. Then I took the carb off and gave it a good cleaning. still same issue. Then I notice that there were bubbles coming thru the fuel line that I could see in the fuel filter and I am not sure that is a good thing. I messed with that a little and thought I had a good flow of fuel going and sure enough, the mower started running real strong and I went for a few more laps and it started boggin down again. I looked at the fuel filter again and there were more bubbles. Can anyone tell me if this is not what should be occurring? Could the shut-of valve under the seat need replacing? I hope it is a fuel line issue, I could take care of that, maybe have to replace the valve... Any feedback on this is greatly appreciated. That includes the proir feedback. This is a good forum.
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Old 06-13-2010, 12:48 PM   post #10 of 19
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Default Re: Bogging down after a few laps

If you haven't already, change the fuel filter. Also make sure the tiny hole on the gas cap is not plugged, this allows air in to the fuel tank so it doesn't create a vacuum. You may also have a pin hole in the fuel line allowing air in to the line.
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Old 06-13-2010, 01:06 PM   post #11 of 19
jimolan
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Default Re: Bogging down after a few laps

so you are saying that I should not be getting air to the fuel filter, correct? I will check out the things you listed, thanx.
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Old 06-13-2010, 01:50 PM   post #12 of 19
eddyyy302
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Default Re: Bogging down after a few laps

Pull the fender pan off (comes off with a few bolts) and check the condition of you fuel lines, sounds as if they need to be replaced.

Dan
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Old 06-13-2010, 03:40 PM   post #13 of 19
tomwom
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Default Re: Bogging down after a few laps

Quote:
Originally Posted by jimolan View Post
so you are saying that I should not be getting air to the fuel filter, correct? I will check out the things you listed, thanx.
That's correct, air in the fuel line will make the engine miss. Start by replacing the fuel filter and checking the ventilation hole on the fuel cap.
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Old 06-13-2010, 06:08 PM   post #14 of 19
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Default Re: Bogging down after a few laps

Hows the battery is good if it low it will make the PTO not engage.
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Old 06-13-2010, 08:37 PM   post #15 of 19
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Default Re: Bogging down after a few laps

Lots of good suggestions but I notice you say the engine "boggs" down after engaging the blades. Could there be an issue with the deck? Bad bearing on one of the spindles or belt catching somewhere? Does the engine and trans run ok without the blades engaged?
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