Yamaha 40 hp -2 stroke. starts everytime,runs good then overheats quickly and cuts out. new gas, plugs, cleaned carb,pump and filter? seems to be pumping water through, using earmuffs.

1. NEVER run gas with ethanol in the engine.
2. When you start it put one half can of anti fogging fluid in gas and run it for 10 minutes.
3. When you are going to store it turn the gas supply off while the engine is running and let the engine run out of gas. That way there is no varnish build up in the carb.
4 change the spark plug twice each season.

clean carbs or injectors and fuel filter and tanks !

fuel filter clogged or fuel pump problem

clean your carb buddy.

Clean the carb again and add some fuel/carb cleaner.

Not enough information, but there are two things I didn't read about you checking. Make sure the fuel quick connection on the engine (and possibly the fuel tank) is locked all the way in first, Then see if your fuel pump is working. Disconnect the fuel line from the carb and, holding it in a gas can, have someone turn on the ignition. If It's an electric pump, it should start running fuel, if mechanical, they'll have to crank it a little to get fuel going. If you get plenty of fuel that way, your float in the carb could have gotten stuck, or something in the line got into it.

sounds like you are going to have to pull carbs off and clean jets also check tank and line for debries

First - Never use starting fluid on a 2 stroke engine. It could wash the oil off the bearings and cause the engine to seize. Try using WD-40 to start it when it is cold. Another thing to try is getting a spray bottle and put your mix gas in it - then spray that into the carb to get it started.

Most of the primar bulbs are 'universal'. You could pick them up any boat supply house, you can also try NAPA.

Two stroke motors smoke. Here is some things to check -if it is oil injected see if you can adjust the amount of oil, if you have to premix the gas, double check your mixture ratio. I like to run most two stroke engines at 40:1 but use good quality 2 stroke oil.

DOES IT STOP RUNNING BECAUSE OF A FOULED PLUG WHAT RATIO FUEL/OIL ARE YOU RUNNING
40:1 IS A GOOD RATIO NEVER HAD A FAILURE IN 20 YEARS