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33R877-0034-G1 DC191023ZD
JD E110

Well it was surging. Currently disassembled awaiting parts.

History that I know of:

• Starter Bendix shattered
• ACR failure
• At been in at least three shops before mine. And one was a JD shop.
• Valve clearance were IN .020" plus EX well over .050. I stop measuring after .050 gauge went through.
• Replaced starter Bendix, Camshaft, and adjusted the valves.
• Was running fine when it was loaded to go home.
• It started surging before the customer unload it so it came back to my shop.

Now the problem was not fuel or mechanical issues so what do you think was happening to cause the surging? The source of the problem had caused over $180 in damages. All because someone didn't keep track of things.

Not fuel... not mechanical... That leaves electrical. Loose battery terminal or cable?

All electrical connections tight. Just be aware it was doing this at full throttle. All the current damage was cause initially by a less than $5 part.

Oil starved?

Anti Afterfire valve problem?
i had one a few weeks ago that surge at full throttle and almost die, the AA solenoid was stuck in the up position.

StarTech said:

33R877-0034-G1 DC191023ZD
JD E110

Well it was surging. Currently disassembled awaiting parts.

History that I know of:

• Starter Bendix shattered
• ACR failure
• At been in at least three shops before mine. And one was a JD shop.
• Valve clearance were IN .020" plus EX well over .050. I stop measuring after .050 gauge went through.
• Replaced starter Bendix, Camshaft, and adjusted the valves.
• Was running fine when it was loaded to go home.
• It started surging before the customer unload it so it came back to my shop.

Now the problem was not fuel or mechanical issues so what do you think was happening to cause the surging? The source of the problem had caused over $180 in damages. All because someone didn't keep track of things.

Click to expand...

If it is hunting and surging, then it is running lean on fuel, as you know. Can only be one of three reasons: 1) air leak intake
2) dirty carburetor 3) governor (long shot).

Hammermechanicman said:

Oil starved?

Click to expand...

Nope, Correct amount of SAE15W50-SYN installed after camshaft replacement.

Scrubcadet10 said:

Anti Afterfire valve problem?
i had one a few weeks ago that surge at full throttle and almost die, the AA solenoid was stuck in the up position.

Click to expand...

Anti-after fire solenoid fine.

Tiger Small Engine said:

If it is hunting and surging, then it is running lean on fuel, as you know. Can only be one of three reasons: 1) air leak intake
2) dirty carburetor 3) governor (long shot).

Click to expand...

Not either one of these either. So it can be something rarely seen. And it had to happen to me. I only seen it once before over 15 yrs ago.

As I said it was not either mechanical or fuel related and it was the result of someone not keeping track of parts while working the engine. This should not be problem if the techs just keep track of parts as they work on engines. It is my fault for assuming that the simple part that cause all the damage was simply left off and one the reason I hate going in behind another that has worked on a piece of equipment. Just so much of this leaving parts off or rigging up something.

Let me give you a hint. The engine was braking at full throttle and then braking would stop as the engine approach idle speed, it was in a cycle of going to full throttle then braking to idle speed and not braking.

Anti Surge spring

hlw49 said:

Anti Surge spring

Click to expand...

If you are referring to slack prevention spring on the throttle linkage it is not the problem. That is a mechanical problem so that was already eliminated.

How about a bad spark plug wire or connection, opening as rpm’s increase. Or spark plug itself.

Rivets said:

How about a bad spark plug wire or connection, opening as rpm’s increase. Or spark plug itself.

Click to expand...

Not an ignition problem.

Another hint. This is what is left of the culprit that initiate the problem. And it was not inside the crankcase.

It once looked like this

So a wire holder that connects to one of the starter bolts wasn't re-installed and got stuck to the flywheel magnet.

ILENGINE said:

So a wire holder that connects to one of the starter bolts wasn't re-installed and got stuck to the flywheel magnet.

Click to expand...

Basically then it got jammed under the stator creating a shorted stator which became an engine electrical brake like the ones you see on Kohler engines but with the engine still trying to run.

Here is what left of the stator. Ouch that is a $93 mistake of the other tech but the customer is having to pay the bill. Just hoping the regulator is okay. I see later after the new stator is installed and the engine is reassembled.

Could be worse. That part could of got wedged between the flywheel and the ignition module and broke the module mounting post off of the block.

wow! that is a very interesting find.

That part is to help hold the starter in place. A small bracket that “locks” one side in place. That is a one off and a good catch.

Tiger Small Engine said:

That part is to help hold the starter in place. A small bracket that “locks” one side in place. That is a one off and a good catch.

Click to expand...

Actually it is to hold the stator output lead in place. And you said it very rare to have this happen but like this should never happen if the techs just keep track of the parts they are removing.

Tiger Small Engine said:

If it is hunting and surging, then it is running lean on fuel, as you know. Can only be one of three reasons: 1) air leak intake
2) dirty carburetor 3) governor (long shot).

Click to expand...

Bingo! Somebody else says something about they've ruled out other things and fuel was one of them. I see nowhere where fuel has been ruled out and if it was it was done incorrectly because if an engine surges like this it is a mixture problem.
It doesn't always have to be at the carb is restricted and not flowing enough fuel because it could be an intake leak or something like that adding too much air to the mixture of the proper fuel but it usually is a restriction issue.

TobyU said:

Bingo! Somebody else says something about they've ruled out other things and fuel was one of them. I see nowhere where fuel has been ruled out and if it was it was done incorrectly because if an engine surges like this it is a mixture problem.
It doesn't always have to be at the carb is restricted and not flowing enough fuel because it could be an intake leak or something like that adding too much air to the mixture of the proper fuel but it usually is a restriction issue.

Click to expand...

Toby if you actually read the first post. Fuel issue was ruled. Please read the whole thread and you will see it was a rare engine braking from a shorted stator. Basically this this proves that their problems not related to fuel or mechanical that can cause surging.