The Inflatable Boat Community, A Great Boating Discussion Forum Providing Free Help And Advice For Owners of Ribs, Sibs, Foldable Rib And Other Small Water Craft.
When I bought a little 3.5hp mariner, the guy told me that the manual says not to run the engine if you use the screw on hose fitting method, but he couldn't understand how the thermostat would let the water up around the head if it wasn't running, so I always just stuck it in a wheelie bin full of water, slept better at night !