Re: gee, my 8N ran great two weeks ago

Posted by chuck on January 31, 2000 at 09:29:52 from (152.163.197.194):

In Reply to: gee, my 8N ran great two weeks ago posted by Bill on January 29, 2000 at 21:45:55:

There are actually four basics required to start an engine; fuel, ignition, compression, TIMING. Timing isn't likely to be your problem, it's more a consideration with an engine that uses a timing chain or belt, most tractors use gears that rarely fail. It's a bad idea to squirt starting fluid into the intake manifold with out the carb on there, if the engine had started it would have revved up out of control until the fluid was burned up or the rods came out through the side of the block. The checks you've alraedy made seem to cover fuel and spark, assume so for now. What you should do now is what is refered to is baseline the engine, in simple terms check the compression of each cylinder. 100 psi in each cyl. would be exellent, anything less than 60psi won't fire. That is just a plain fact. If a compression test shows 60 or less under the present circumstances, then you might get it running by changing those circumstances. All that gas and starting fluid might have washed the oil off the cylinder walls, the weather might be colder and thick oil might cause a slower cranking speed, thus lower compression, colder temperatures also mean a weaker battery, also lower compression. So, if the comp. test is low, warm up the engines enviroment, or jump the battery with a 12volt source, or put some oil in the cyinders while you have the plugs out(spin the motor over before replacing the plugs to insure you didn't put too much in), try new plugs. If none of these things work for you, then rexamine the fuel and spark.

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