Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Thank you for this information. Did your engine start briefly, after you sprayed fuel into your carburetor?
Your fuel gets to your combustion chamber, via your carburetor. Have you checked your oil? Do you generator have a low oil sensor?
The valve that is up, should not have play in it, due to the tension from your valve spring. If you spin your engine, will both valves open and close?
Yes it will.
Are you familiar with adjusting your valves?
Thank you for the picture. That part is your rocker arm. Its purpose is to open and close your valves. If one rocker arm have considerably more wobble than the opposite one, then you could have a partially stuck valve.
If you have a partially stuck valve, or if your valves are out of adjustment, yes, this can prevent your engine from turning over. If you rotate your engine until your piston is all the way to the top, and both valves are closed (compression stroke). You should have an equal amount of wobble on both rocking arms.
Yes, one should be opening, as the other one closes, except for when your piston is at top dead center, on your compression stroke.
Keep in mind that your engine need three components, in order to perform to your satisfaction. It need Spark, Fuel, and Compression.
You stated that you are getting spark to your spark plug. The gas you sprayed into your carburetor, provided fuel. This leaves compression.
If your valves are not working properly, this could be our problem.
So, if you are absolutely certain about your spark, and your spark plugs are new, then compression could possibly be an issue.
Have you ever heard your engine run?
90 psi could possibly be enough, but I am concerned about your valves.
Yes they are.
Your valves are a part of your cylinder head, which includes your spark plug.
We can continue from here. Thanks!