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Wife hit hammer in yard tractor died turns over dont sound right took out plug some compression dont think the valves are moving will back fire ater cranking for a wile

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Check your blades, replace with straight ones. It is impossible to further diagnose until you've done this, and it may be your only problem.
Regards, --W/D--

Posted on Jul 21, 2009


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Posted on Jan 02, 2017


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Motor knock

The thing that catches my eye is you stating the spark plug was flattened.
I assume you mean the side electrode bent down against the center electrode?

This is normally when the wrong length spark plug is used, extending too far into the combustion chamber.

HOWEVER, this will hit the spark plug immediately!

That would mean SOMETHING had to hit it to bend the electrode.

One thing that MIGHT have happened (very rare) is a valve head snapped off the valve stem, being propelled off the moving piston, and rattling around inside the chamber, hitting the spark plug.

Another possibility, (even rarer) is the connecting rod broke in two, allowing the piston to rise higher into the bore than normally allowed.

A compression check will right away reveal if either of these incidents happened, as you'll have NO compression in the affected cylinder!

Anything on a bike CAN be fixed, if you're willing to outlay the money!

Jan 31, 2014 | Harley Davidson XL 1200 C Sportster Custom...

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Craftsman LTS 1500 lawn mower - model # 917.28903 started sounding funny while i was cutting VERY high grass. I turned it off immediately and it backfired as it shut off. Wouldn't restart. Waited til next...

I would check the big three first of all. Spark, compression and fuel. Sounds like you have spark and fuel. I would get a compression tester to check actual amount of compression. If all three of those things are good I would check valve lash. You will need make, model and serial number of engine. If you post these I can help find specs for you. Good luck.

Sep 14, 2013 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

I have a Cub Cadet 1641 Garden Tractor with a Briggs Stratton engine. This tractor is well maintained and normally runs great. This spring I cannot get it to run. It turns over strong and the gas is...

Hi I assume that we are talking about a petrol engine, if it is, it is most likely the inlet valve to the cylinder is stuck, first remove all spark plugs, then remove the rocker cover, this will reveal the valve stems now turn the ignition key and watch the valves compress one at a time taking specific notice to the Dry cylinder valves, the inlet valve would appear to be stuck if it does not compress like the others the simplest way to unblock it is to give the valve a sharp tap with a soft face hammer like a Thor Hammer, this should free it up then try turning the engine again, still with the spark plugs removed if all valves open and closed refit the Spark plugs (Dry, Clean and Regap them first)
this should do the trick, also its a good idea to drain off all the petrol in the spring and replace with fresh as petrol does deteriorate when stored over winter.
Good Luck

Apr 28, 2011 | Computers & Internet

1 Answer

Engine starts and runs okay until I engage blade

I had the same problem on a 21HP, you are running on one cylinder. Take off the valve cover and most likely you will have a/some bent valve push rod(s) which is common on B&S V2 engines. They are cheap to buy but kind of tricky to install and properly adjust.

Jul 06, 2010 | Craftsman 24 Hp 48" Deck Yard Tractor

1 Answer

Wont start

It sounds like the cylinder is filling up with gas,does it still do it after you take the plug out and crank it and put the plug back in and does it have any gas come out of the cylinder when you crank it?

Jun 02, 2010 | Craftsman 20 hp 42 in. Deck Lawn Tractor -...

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Back fireing 22hp v-twin briggs, run but back fires all the time it's running. is this a valve or damaged flywheel key problem?

I dont think that it would keep running if it was a damaged flywheel key? Seems like eventually it would go on and slip too much. But a leaking valve sounds like the most logical answer. Take the spark plugs out and stick your finger over each cylinder and turn it over. see if one of em has more compression than the other. If one is take the valve cover off that one. and see if you can see a week spring or something.

May 11, 2010 | Craftsman 20 Hp 42" Deck Lawn Tractor

2 Answers

Will not start

As I stated, I've seen this issue personally over 50 times on escorts, and your cylinder head is dead. I knew you would have almost zero, or zero compression on at least 1 cylinder. Your valve seats on that cylinder have broken out of your cylinder head, and have dropped the metal shavings on to your piston. Therefore, your valve cannot seat on the cylinder head (it's a wide open hole), and you have no compression on that cylinder.

"You can fix this engine" if you have the time, and want to drop a few hundred dollars on parts. You do not have to remove the engine to fix it, all parts are accessible while the engine is in the vehicle.

You will need a new ($1000.00 or more), or used ($100.00 at a junk yard) cylinder head. I personally would also replace the piston on that cylinder, but I've seen it done without replacing the piston as well.

If you choose to fix this engine, I will guide you through the process, just post another comment, and we'll go from there.

May 18, 2009 | 1998 Ford Escort

1 Answer

2000 audi a4 2.8 was hit in the front change the bumper ,radiator

Sounds to me like your timing belt jumped on bank 1.

Dec 11, 2008 | 1998 Audi A4

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