I have connected the suction pipe to the vacuum connector by the engine but my carb floods. Am I connecting it to the wrong place?

Most remote purge bulbs have two connections one long one short, the thing to remember is the bulb pulls fuel from the carb into the bulb and back to tank, the short connection is the suction side so goes to the carb, the long connection is the pressure side so goes back to the tank, get it wrong and you will just flood the carb.

You need to pressure test the carb, if the needle is leaking in the seat it will just flood all the time, if you do not have a small pulb pressure tester you may need to get the local dealer to do it, or just fit a new rubber tipped needle and hope this will cure it, if there is two hoses to the carb make sure you have connected the pipes in the right orientation, the suction side of the primer should pull fuel from the carb, and dump back to the tank, it does not push fuel into the carb, this will make it flood.

The 2150 has a remote primer, so there will be three pipes, the pipe coming from the fuel tank with the fuel filter on the end is the main fuel tube, this fits to the connection on the carb nearest to the pump cover on the carb ( alluminium cover held with a single screw ) the other connection on the carb has a pipe to the shorter of the two connections on the back of the primer ( suction side ) the longer connection on the back of the primer ( pressure side ) has a pipe back to the fuel tank, so the primer pulls fuel from the tank, into the bulb, and dumps it back to the tank, it does not push fuel into the carb, this way you can depress the bulb as many times as you like without flooding the engine.

There are two connections on the carb, one is connected to the suction side of the primer bulb, the other to the fuel pick up pipe in the tank, the idea is the primer pulls fuel from the carb, into the bulb and back into the tank, if the pipes to and from the primer are fitted round the wrong way it will try to push fuel into the carb and make it flood, so check the suction side of the primer is connected to the carb, and the tressure side is back to the tank.

Are you sure you have connected the pipes up to the primer the correct way round, the primer pulls fuel from the carb, and back to the tank, not the other way round, the short connection on the back of the primer is the suction side, so goes to the carb, the longer connection is the pressure side so goes back to the tank.

I have never seen one of these machines, however machines with fuel bulbs all work the same way, the fuel hose in the tank with the filter on the end connects to the fuel inlet nozzel on the carb ( the nozzel nearest to the pump cover afixes with one central screw ) the a hose then connects to the other nozzel on the carb, and afixes to the suction side of the fuel primer ( normally the shorter of the two nozzels on the primer ) another pipe connects to the other nozzel on the primer ( normally the longer of the two, the pressure nozzel ) and the other end is just pushed into the fuel, to return the fuel. Remember, the bulb pulls fuel from the carb, into the bulb, and dumps it back into the fuel tank, this way it cannot flood the engine.

Who connected these hoses? the normal routing for a machine with a primer is like this, the fuel hose from the tank with the filter on the end goes to the carb fuel inlet nozzel ( not to the primer ) nearest to the pump cover ( cover on carb held with one screw ) the pipe from the metering side of the carb connects to the shorter nozzel on the primer bulb ( suction side ), the longer nozzel on the primer ( pressure side ) connects to the pipe going back to the tank, just remember the primer pulls fuel from the carb,into the bulb, and pushes it back into the tank, it is not actually a primer it is a purge. because it is connected this way it is impossible to flood the engine no matter how many times the bulb is pressed.
Let me know if it starts and runs.

First, check the hose, wands, and power nozzle. You can check the hose by dropping a coin in one end, then lifting the length of the hose until the coin drops at. If it doesn't, then there's an obstruction in the hose that needs cleared. Depending on where th blockage is, it can be difficult to remove. The best way is to connect the wrong end of the hose directly to the in port of the vacuum and turn on. This presents an opposing suction to the clog and should clear it.
To check the powerhead, drop a coin in the wand end and allow it to drop through. If it gets stuck, there's a clog, probably in or near the elbow. Use a blunt object to gently push it through. You can visually check the wands.
If the filter is dirty, it presents an obstruction to the airflow, and will result in a loss of suction. Rinse and dry thoroughly. I recommend keeping an extra filter on hand and alternate use.
Check all outlets by plugging hose into them and turning machine on. Check for differences in airflow. If there's less suction in one than the other/s, then there's a blockage in that section of pipe, probably at one of the elbow. The obvious place would be the elbow at the outlet. Visually check for clogs.
If all the outlets have a low airflow, my first guess would be the filter in the vacuum, but there could be a clog in the main piping.
Another cause could be leaks in the hose, most likely at the ends where the hose connects to the connector or handle. The hose generally needs replaced if this is the case.
The fan system may be bad, resulting in reduced suction. It will need to be replaced if this is the case.
Depending on the age of the vacuum, the motor could simply be wearing out.
The best diagnosis can be provided by a reputable vacuum repair shop. Take the entire vacuum in for trouble-shooting if none of the above helped.

it could be the motor