Do you flush your engine using the hose attachment with the engine running? I have always done this, but after rereading my manual, it says to flush with engine off. Can the engine be damaged by running if water is moving through the pump while running? Engine is a Verado 150.
sandlapper1977
Don’t know about merc’s but on yamaha’s the hose attachment is to be used WITHOUT the motor running, as opposed to putting the boot on the foot, which you DO run the motor for. The Yamaha manual reccommends doing both methods.
Mercury is the same. I was under the impression that if the motor was peeing, it was ok to have engine on.
here you go… i guess it is fine.
“Freshwater flush system: Routine engine flushing is easily accomplished from inside the boat or when the boat is trailered. To flush the engine, simply twist the flush cap one-quarter turn and pull. The cap is attached to a length of hose that provides easy flushing access from the front, side or rear of the engine. Remove the flush cap and attach a standard garden hose. The flush system has a swiveling head to avoid twisting the garden hose while connecting it. The flush cap is tethered to the hose for added convenience. The engine may be flushed while trimmed up or down, and with the engine running at idle speed or turned off. When secured, the cap is flush with the cowl and there is no unsightly hose hanging out of the engine.”
http://www.mercurymarine.com/news-and-events/news/2011/10/20/mercury-150-fourstroke-wins-ibex/
do not run above idle speed or you will ruin the waterpump
idle speed is perfectly fine
Thanks for the responses!