Re: honda bf225 oil alarm?
gss036 - IMHO, as long as you're flushing the outboard motor by running it, it's not the pressure of the washdown water supply that's important, but rather the volume of water flow available. My rationale is that the outboard's water pump will supply all the pressure that is required if the volume is available. After all, when the outboard's water pump is pulling cooling water from the ocean/lake/river, that water is not pressurized more than a psi or two, and likewise if the outboard's water intake is immersed in a barrel or tank. Again, IMHO, I would ensure use of an adequate diameter hose for the flush, and as long as there was a solid stream of water constantly flowing from said hose, I'd think one would be good to go. Of course if the hose just dribbled water, that would be insufficient volume.
I often see the local USCG flushing the twin BF225's on their Defender Class boats using a hose to supply the running motors. They seem not to have any problems. I would not trust flushing my motor solely with a hose and the motor not running since that does not flush the water pump area.
Just my 2?.