I have a Generac 4LM41A standby generator that I need help in troubleshooting and repairing. It is about 12 years old and hasn't been used much.It backs up our greenhouse and has been started every month and run for a while. The other day I went to start it while it will turn over it wont start and run. Ive tested compression in the engine as well as spark and both are good. Usually at this point I would look to fuel delivery. The unit was recently checked for gas leaks -none-, the electrical parts of the engine Generator , boards, etc were also passed as OK by a gas and generator technician respectively. None of these repair guys knows anything about the 4 stroke engine. I do, however have a good working knowledge of 2 and 4 cycle machines...just have never worked on one that was run by being supplied with propane..usually its gas or diesel. Can anyone give me tips on whats a good way to pinpoint the primary issue...if its the carburetor or something else??? The normal things I do to pinpoint the trouble (IE - pour gas in the spark plug hole ) obviously wont work here. The carburetor on this thing doesn't have a bowl to hold fuel..instead it has the propane gas line running directly into it and attaches through what looks like a cylindrical fuel solenoid. I dont want to have to replace this unit! I am confident I can fix it if pointed in the right direction. Please advise..and Thanks in advance for ANY help!

I have the usual steering shaft and sector problem. I have ordered new bushings and tube, I need an explanation of how to remove steering shaft and sector for my model, I have read many posts, none of them address my model. Thanks in advance for your help. JackCT