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Engine running too fast

While mowing with lawn tractor, the engine suddenly went wild. RPMs seemed to double. I quickly shut down. Each restart results in the same high rpms. Throttle moves freely, but has no effect on the engine. Any ideas?

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Have someone check the govenor on it. Sounds like it is mesed up

Posted on Jun 20, 2009


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How do I keep my 2510 John Deere tractor to not stop running when it gets warm?

I am sending you an article from but they don't mention the first thing I would suspect until the end of the article, which is the coil.
" It can be puzzling when a lawn mower starts easily and runs fine for a few hours, only to stop with no warning. This sudden shutdown can be caused by an overheating engine. Reasons for an engine to overheat and shut down include debris clogging the area around the engine, low coolant levels, a problem with the oil, or an engine mechanical breakdown.
Sponsored Link Consumer Reports Website Find the Top & Worst Rated Products Unbiased Tests, Ratings & Reviews Debris Buildup of grass, twigs, and other debris that block air from reaching the engine can quickly lead to an overheating lawn mower. Debris in the engine cooling fans, engine shroud, air intake screen, grille and/or side panels prevent air circulation that would normally keep the engine cool. If the engine gets too hot, it will shut down and may be damaged. In some cases, the buildup of dry grass may catch on fire. Remove grass clippings from the engine area regularly to prevent this problem.
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Loose Fasteners If a mower dies when the area around the engine is clean and oil levels are correct, there may be a problem with the fasteners in the engine. Begin by checking the carburetor mounting bolts and the bolts located where the intake manifold and engine block attach. Popping or puffing noises near the engine head may indicate that the head bolts are not tightened far enough. If noises seem to be coming from the exhaust system, check the exhaust valve. Tightening any of these fasteners that seem loose may solve the problem.
Engine Maintenance Certain problems that cause a lawn mower engine to overheat and shut down require more extensive maintenance to correct. Routinely check engine parts, such as shrouds and cooling fins, for damage and replace as needed. If the engine will not restart until it cools down, the exhaust valve or valve seat may need to be replaced. The condenser and engine coil can also cause overheating if they start to go bad. Maintenance on these systems can be performed at home by removing and disassembling the engine to replace damaged parts, or by taking the mower to a qualified service technician."
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