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post #1 of 7 Old 08-18-2019, 07:47 PM Thread Starter
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Suggestion on what's wrong with 210

To start, I'm not a mechanic and I don't understand how lawn mowers are meant to work. I have a 1976 210 which I have owned since 1982 or so. It has had very little maintenance other than oil, grease, filters, belts, an engine rebuild, and points, plugs and condenser, and maybe a coil.

Let me explain my saga and my questions. Many years ago the throttle linkage connector to the carburetor broke, and it was simply wired on. Tractor didn't seem to me to notice it. About five years ago, I sent it to a former JD mechanic for a Complete pre-season service and an engine rebuild. He rebuilt the engine, didn't do anything about the wired on throttle linkage, sent it back to me, and it ran and cut like a champ. At the beginning of last year, because he was no longer in business, I sent it to a local JD dealership for pre-season service, although I'm not sure what they actually did. They sent it back and it ran and cut like a champ.

In the middle of the summer one of the deck belts (can't remember which one exactly but I think it was the blade belt) jumped off the pulley. I took it to them, asked to have a new belt, and asked them to look at the broken throttle linkage. They told me that the governor wasn't working right because of the throttle linkage. I told them to fix it. They did, but at the time, they told me that the socket for the ball in the linkage was terribly wallowed out. that a new carburetor from JD would cost over $300, and that there was only one in the Southeast. Carburetor was a Walbro. I told them not to buy the new carburetor, because it has been running so well before. They replaced the belt and sent it home.

From that point, I've been in 210 hell. The machine came home and wouldn't cut grass at all. It would get in grass over 4", the engine would try and stall, and if the clutch was engaged, the engine would speed back up and run okay until it hit another patch of tall grass. I called them in distress and they blamed the old carburetor.

So I just bought and had them install a Carter #26 carburetor from isavetractors. They had to make a gasket for the air vent intake and drill out the new throttle linkage to make it work, but the engine is running quite well if it isn't trying to mow.

BUT--with the new carburetor, the mower is doing exactly what it did before the carburetor is ever replaced. It will crank and run perfectly, but when I engage the PTO, the engine slows perceptibly, and when I try and cut grass that is taller than about two inches and thick, the mower will stall unless I use the clutch and let the RPMs come back up.

So now I'm wondering if my problem was EVER the carburetor.

Can someone explain to me why the mower would stall and then run just fine once the engine clutch lets the RPMs get back up? The problem is ONLY when the PTO is engaged.

Could it be that the new belt they put on is just not adjusted properly or that the PTO drive belt is not adjusted properly or the PTO clutch is either bad or not adjusted properly? I know all these are adjustable.

Is my motor dying?

I need expert advice on what might be wrong, and I thought I would ask you folks for yours.

I have the 210 owners manual and the 210 service manual, and I'm just not capable of doing anything more than adjusting the blade belt.

I'm a lumberjack, and I'm okay.
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post #2 of 7 Old 08-18-2019, 08:31 PM
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Re: Suggestion on what's wrong with 210

So take it too a reputable JD dealer, if it is beyond your capabilities. But the problem lies with either the governor, the linkage or the carburetor (adjustment when to kick in under load)

Mower deck/PTO, the manual should have how to change a belt and it's tension for the PTO. I would check deck spindles and the pulleys to make sure they spin freely (with out feel of grit or excessive play). Keep the bottom of the deck clear and clean of build up also.

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Last edited by RussKish; 08-18-2019 at 08:39 PM.
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post #3 of 7 Old 08-18-2019, 08:34 PM
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Re: Suggestion on what's wrong with 210

I agree with Russkuss...you need a mechanic who knows what he's doing.

My "honey-do list" is so long it has chapters.
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post #4 of 7 Old 08-18-2019, 10:28 PM
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In your case I would probably take it to a dealer or talk to a knowledgeable someone in person.
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post #5 of 7 Old 08-19-2019, 01:10 AM
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Re: Suggestion on what's wrong with 210

Sounds like the governer linkage got disconnected somewhere along the transition.
Look for a rod heading under the shroud that connects to the carb.
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post #6 of 7 Old 08-19-2019, 08:58 AM
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Re: Suggestion on what's wrong with 210

This is a problem with the governor. It's either not connected, connected incorrectly, not adjusted, or failed totally.

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post #7 of 7 Old 08-20-2019, 10:13 AM
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Re: Suggestion on what's wrong with 210

I believe he took it to a JD Dealer last.
If they installed the new carb, then they should have adjusted throttle and for sure the governor linkage.

It seems like the problem might be this particular JD Dealer. Any reputable shop would have gone out back to test this thing before putting it back into service.

If the engine struggles on PTO engagement, then I'd first check the spindles for free movement. Shouldn't be anything but a half a second dip in engine RPM on PTO engagement. Anything more, there is a problem.

After some research and some experience with a local suburban JD dealer, I opted for one in an agg community. When they repair something, it has to be right. Just try and send a repaired 9620 out the door that fails to pull or stalls out. The difference in quality of service, parts availability, and overall decent people, is astounding. I travel to that community regularly so using them is not that much of a problem. I'll gladly haul my JD X500 the 106 miles one way, to avail myself of the dealer and it's people.

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