Hemant … First, draining your battery will nave no effect on the fuel pump or the carburetors; it may, however, have a bearing on the engine not starting.

Check to see if your initial conclusion is correct. Verify that you are getting fuel to the carburetors by removing the new rubber hose, turn the engine over and see if fuel squirts out. If fuel squirts out, you are getting gas to the carburetors and you should then check the electrical side. Leaving the key on all night might have burned the points in the distributor. Check for spark by removing the distributor center wire and while holding the end close to the block as someone else turns the engine over. If you do not see a spark, you probably need to clean or replace the points. Try filing the points to clean them, regap them and see if you now have a spark.

Good Luck

__________________
Jim Villers
190SL, 230SL 5-speed, 95 E320 Wagon, 01 E320 Wagon, MGB, Boxster 'S', 190SL "Barn Find"