1994 700..Starts immediately w/starting fluid.. Runs for seconds & throttles ok and then dies. Will restart again same way and then dies again. Just acquired, everything looks great & clean, all factory. Hasn't run in 2 years. I put fresh fuel & 2 cycle oil. New BR8HS NGK Plugs. Battery Good. I also own a 1996 Yamaha 1100, 3 Cylinder, almost identical. I did however replace both rear main seals for a similar problem. Could this be the same problem??? How do I verify this???

Sounds like you are starved for fuel. Look for a pinched off fuel line or a plugged up fuel filter. That would be my first place to start. Possibly even a bad petcock on the tank.

Hahn does have a little oil cut off switch. The engine will not start if it is low and oil fill it and try it

car starts then cuts out after 2 seconds, please help!!? ' Yahoo ...

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Mar 22, 2010 - Car starts then cuts out after 2 seconds, please help! ... I went to start it this morning, it started up fine but only for literally 2 seconds then it just cuts out. .... In every after how many kms we should engine oil in the motor bike?

Engine fires up, but cuts out. - Gassing Station - PistonHeads

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PistonHeadsMar 23, 2012 - When the engine is cold it needs a bit more fuel to stop it cutting out(sort of like ... If you can't do it yourself then you shouldn't need to take the car to your ... Also, starting with your foot on the throttle seems to cause all sorts of ...

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Nov 22, 2010 - Askville Question: What is the problem if the car starts and then dies almost immediately? ... I waited for my kids, and when I tried to start it back up, theengine turned over but then died immediately. ... 1. out of gas, or bad gas

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Jun 26, 2014 - When I start the car the engine catches but then dies almost immediately. I have to restart the car 3 or 4 times like this until the engine starts ...

Car starts, then cuts out straight away!! - boards.ie

To test fuel flow, have a 2nd person stand over air filter (air filter housing open) with a can of starting fluid in one hand. Don't give any throttle, then 2nd person gives 1-second squirt into air filter while you're turning starter motor (no throttle). When engine catches, immediately give one third to one half throttle. Just before it dies, 2nd person should give another short squirt of starting fluid to keep engine from dying. If throttle won't keep engine running and only starting fluid keeps it running, then yes, no fuel is going through fuel lines. Either its a fuel pump issue or maybe there's restriction because of clogged dirty fuel filter. If it starts but runs rough and has black exhaust smoke, then its clogged or dirty fuel injectors.

sounds like you have a fuel pump problem, fuel pumps will usually get hot and then shut off allowing it to sit 30 mins lets the pump cool down allowing it to start pumping, the way you can test it is get a can of starting fluid the next time it quits raise your hood and spray some fluid down into the throttle body and if it starts and then dies it is most likely your fuel pump, hope this helps.

Try some staring fluid or a few tablespoons of fuel in the intake manifold at the throttle body.
If the car starts and runs for a few seconds, the fuel delivery has a problem ( like a fuel pump or clogged fuel injector).

If it doesn't start up immediately, then it's a possible spark delivery problem.

That should narrow things down a bit.

Ok a quick check. When the engine cuts out and you go for restart it dies within 5 seconds. Next time put the ignition at position 2 (on but not starting) and wait one minute, then start the car. If the engine again runs for 30 seconds before cutting off this tells you its is a fuel problem. If the fuel is supplied slowly it fills the carburettor fuel bowls and when the car starts it quickly uses up these local reservoirs of fuel faster than they can be replenished. When you try to restart immediately there is only a tiny amount of fuel and so it used up almost immediately. By leaving the ignition on 2 for while it gives the pump time to fill the carburettor bowls and this takes a while longer to run down when the engine starts. Just before moving on does the car have a choke OK remove the low tension connection to the coil, basically remove any chance of a spark. Put a big old towel around the carb. Now remove the fuel line at the carburettor and put ignition on 2 to engage the starter pump. Listen to pump operation and look at the rate of fuel being pushed from the disconnected fuel pipe. If the flow is slow check on pump and filters.

Sounds like u have a fuel problem. The engine is not getting the fuel it needs thats why when u spray the starting fluid in it runs then dies when it burns it up. check the fuel pump and see what kind of psi your getting.

Air filter clean?
Air filter port set for summer or winter ?
Check the fuel filter inside the tank to ensure that it is not dirty or hasn't fallen off.

Sounds like it could be the throttle position sensor.