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Craftsman 6.75 Lawnmower model 944.369300 - Valves stuck open; piston still moves. Engine is not seized.

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Posted on Jan 02, 2017

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SOURCE: Looking for operator's manual for 6 horsepower

sears web site has manuals in pdf free download, you will need your model #

Posted on Apr 02, 2009

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SOURCE: cylinder head torque specs

Cyl. Head Bolts torque

200in.lbs

16.5ft.lbs

22.5Nm

Posted on Mar 26, 2009

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SOURCE: lawnmower

what do you mean doesn't engage? doesn't start, doesn't let you pull, doesn't cycle, what?

Posted on Jun 24, 2009

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1 Answer

I have a brand new craftsman 190cc lawnmower and the pull cord will not pull out


If it's new sometimes the manufacture puts a safety block to hold it from moving during transit. Check for this. See if the blade will turn and if not see if there is a seized area. Is the blade jammed against something.

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No compression when I pull the cord on my lawnmower Briggs and Stratton. What do I look for and how do I fix it?


There could be a whole bunch of things to cause this, from a badly worn engine to just a valve stuck open, a dealer could do a leakdown test on the engine and give a more definate reason for the problem, or you could remove the cylinder head ( side valve engine ) and check the valves are opening whilst turning the engine.

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My craftsman lawn mower has no resistance when I pull the rope even though the blade and flywheel spin


I would guess either one of the valves is stuck open ( if its an over head valve engine, take the rocker cover off and check if the valves are moving when the engine is turned, if its a side valve engine remove the cylinder head to check) or the auto deco valve on the cam shaft is stuck, this would be engine apart to check.

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Pull cord will not pull out for model 358.794765 on craftsman blower/vac


you may have blown your engine. try to move the piston up or down when you take off the spark plug. if it does not move you may have broken a piston ring and the piston may be stuck because of the broken ring. you can also try to check the starter string where it is coiled in the spool. it may be just tangle up. remove the casing and check the string off of the engine.

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1 hp 3gal craftsman compressor will only build up to 20lbs pressure in tank. how much compression should single cyl have on compression stroke?


A piston in any engine should be around 100 psi I would guess. A Chevy 350 used to be around 150 psi. An air compressor that only pumps enough air to reach 20psi is obviously too low on compression. Nailers and the like need 80 or more psi. The intake valves may be shot, the unloader might be stuck or piston rings are worn.

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I have a brrigg and stratton 8 hp i got the moter un seized and got the flywheel sping and nothing happed and when i turn the key the flywheel will spin for a sec and then stop and i put a new spark pug in...


What made the engine seize in the first place. If it seized from just old age and setting the valves are most likely stuck open. Most of the time the valves are what makes an engine seize from setting. You just moved them enough to let the piston move up and down they are more than likely rusted. Check for compression.

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