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Check the fuel lines. My brother had one that wouldn't start because when the fuel line was forced on to the fitting, some rubber shaved off the inside of the tubing and blocked the fitting. Also inspect the fuel filter and fuel cutoff or check valves if these are present.
I haven't looked up your particular model, but some riding mowers have fuel cutoff interlock devices. Check those for proper operation.
the motor you are working on has a split block and you have to take the motor off and remove the bolts holding the two halves of the block apart. this motor doesn't have a separate removable head. it is cast as two pieces and in my opinion makes more work for some repairs. hope this helps
It is possible but unless you have wild cams and the test was done at the top of mount everest I doubt it. In a stock motor 75 psi would be less than 6:1 compression ratio. Was the testing done at wide open throttle.
Well, there are a few causes for low compression....bent valve, broken rings, worn cylinder, broken/ chipped valve, blown head gasket, cracked head, cracked block/ cylinder, broken/ cracked piston......as you can tell, none of which are good and always means going into the engine to repair. A lot of times it is quicker, cheaper, and easier to exchange the engine for either a remanufactured or good salvage yard engine.
It is hunting. This occurs due to the carburetor being dirty and a hole is at lease partially blocked. You will have to remove the carburetor and thoroughly clean it. Take a picture of the linkages so that there is no doubt as to where they go when reinstalling the carburetor.
Most circular 7-1/4 saws have a bolt and a compression washer that acts as a brake shoe that holds the blade secure but under dire circumstances will allow the blade to slip some rather than hold the motor shaft and allow burn out. The compression washer under your bolt has become worn and doesn't grip the blade securely. You can find a split washer that will fit under the blade and give you some more friction, or go to sears and order another compression washer for your saw.In the Sears Parts List found at: http://www.searspartsdirect.com/partsdirect/part-model/Craftsman-Parts/Saw-Parts/Model-32018780/0247/0744410/50035950/00001?blt=06&prst=&shdMod=
#1 cylinder not firing, check spark plug, spark plug wire, remove spark plug and use a compression tester, and check the compression of that cylinder. should have at least 65 pounds of compression per cylinder. If the compression is low, you may try shooting a little oil in to that cylinder, replace spark plug, and try running motor again. if the compression is low on said cylinder, could be due to bad piston rings. requiring a motor rebuild.
Your motor is pooched. Oil is not supposed to come out the exhaust. It indicates a worn out motor or something broken inside like a piston or compression rings. Or possibly someone has put half a gallon of oil in it instead of half a quart and it's well overfilled?
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