"LOOKS LIKE A BOX ON THE FRONT
"LOOKS LIKE A BOX ON THE FRONT BOTTOM OF THE ENGINE. TOOK IT OFF AND THERE IS NO RUBBER IMPELLER. LOOKS HARD TO GET OPEN AND I WILL NOT ATTEMP IT TILL I FIND OUT MORE. IS THERE AN IMPELLER AS WE KNOW IT IN THERE? IT SEEMS TO FREE WHEEL, LIKE A CIRCULATION PUMP. IT...