© 2011 Brian L Johnson Blocked water inlet Okay, let's get rid of the blockage. Take something long and thin (a straightened wire clothes hanger?) and poke it gently down the plastic tube and out into the river. You'll be able to feel when it's pushed the blockage out. Do it twice -- just to be sure! When it all feels clear, pull out your poking tool. Close the stop-cock. That’s important.  Next, unscrew the hose-clamp on the clear hose and remove it. Re-fit the black hose and tighten its hose-clamp. Now, before you open the stop-cock to let the water flow again, look at the weed-trap. It’s empty. So, take the top off the weed-trap and completely fill it with water. Put the top back on the weed-trap Now you can open the stop-cock and start the engine. Finally, check for water flow in the weed-trap and that there are no leaks. Job done!