Quote:
Originally Posted by cooperino
No Jon, sorry. There is always air in the carb and cylinder. Even when its not moving. If a valve becomes bent and wont close you get zero compression. Engine wont run. Your "you need 3 things to run" is an extremely old school term and I'm older than you. You need fuel, ignition, and compression to run an engine. They used to call it four things but air was omitted as it is ambient or always around so unless your trying to burn fuel on the moon. Your good.
Air is not compression.
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Jon is correct.
In my 50 plus years working on engines I never heard there was 4 things needed to make an engine run. All my teaching manuals never said there was 4 things to keep an engine running. I've learned, I've taught anyone who wanted to learn, was an Ohio State Fair small engine judge for years. I do seminars at 2-3 different tractor shows every year. Expert I'm not....still learning....
I used to train local Vo-ag kids to compete in a local small engine trouble shooting contest. They had 6-8 different stations where the ag students had to answer questions or the best one was trouble shoot an engine. They had to fix 3 different things in 30 minutes. One of the best one was putting tape around the air filter and putting pre cleaner on so it didn't show the tap. Someone posted that air is ambient or always around. In this case air wasn't
ambient or always around. Remove the tape from the air filter and the engine ran. What was simulated was a plug air filter.
My current job is trying to keep 50 golf carts and 20 grounds keeping machines running at a local golf course.