Re: raw water washdown
As long as the pump is USCG approved for spark arrestment. That is just one of the draw backs, but most marine washdown pumps will meet those standards.
The other problem is the your battery compartment should be vented to expell the acidic fumes during the charging phase of the battery. These fumes can react on the exposed metal parts of the washdown pump. Use stainless fastners as they will not corrode and will allow easy maintenace later on. Nothing I hate more than trying to take out a screw that is hard to get a tool on.
If it was mine and the pump was designed for marine use,,,,,,I'd do it!
