I have a coleman powermate #PM0545305.03 I started up and it ran for a couple of mins. than shut it self off. I've change the oil, fresh gas, new plug. I tryed to check the spark by taking the plug out and grounding it to the eng. blk still nothing. any help is appreciated just Dale

Maybe you can aks the supplier who supply the generator to you directly. Because only he knows clearly about their generator

Check to see if you model has a puel pump, f it is a Brigge & Stratton 10 hp I am sure it does

Carb is probably the problem as you thought. It sounds as it might be running too lean, meaning the mixture does not have enough gas in it. Try turning the high speed mixture screw (remembering the position that you started from) counterclockwise in 1/8 turn increments (adds more fuel to the mix) until it starts to run rough then turn back to mid point from where you started from. Have you tried checking for obstructions to the proper circulation of air through the fins for cooling. Make sure all the shrouds are installed. Some people think by removing any covering over the engine will help for cooling, it doesn't they are designed to have all the parts on it for proper cooling. Hope this helps a bit. Good luck.

when the engine sets for a long time the gas can seep bast in to the cylinder and their will be some gas you will need to change the oil and take the spark plug out and air i suggest you squirt a small amount of oil in the cylinder gas in the cylinder can wash out the lube to the rings and cause undo wear and start smoking turn the engine by hand slowly to allow lubing of the rings the gas seepage is most likely caused by a float that's not set correctly you may need to rebuild the carb with a kit around 20 bucks ans easy to do at least the clean it well to remove schlack that gas leaves behind when it dissipates and can cause issues.
replace with fresh gas and run the engine and it will smoke for a couple mins do to the oil in the cylinder remove the spark pug after running a couple mins and clean or replace the engine should be fine following the steps above. hope this helps

Fresh Fuel
Clean carburetor if stored with fuel in the tank and wasn't shut off
Clean fuel filter
Clean air filter
Proper oil level
Clean spark plug (just replace it, it is easier and faster)

Do check the oil after it has tried to start. Low oil cutoff would certainly cause the problem. Look for the "lost" fuel shutoff valve... there usually is one.

I hate to ask,is there oil in it?There's a shut off for low oil level,it's to save the engine from starving for oil.

Old gas, gone bad from sitting. Drain all gas out and use carb cleaner in unit to clean. Add fresh gas.

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low oil switch stuck. most new small engine have a low oil swich in the oil pan. this can be by passed or replaced.

oil level is low???