The unit should be securely fastened to a strong, stiff, platform. The platform should be marine grade plywood of at least 1" in thickness. Two 3/4" sheets, glued and screwed together are ideal. Anything of a thinner character will result in vibration of the platform and create noise in the boat. The platform should be supported by stiff structural members secured to the vessel. Additional vibration mounts between the generator and the support system are not required, and in fact may add vibration noise due to sympathetic resonances between the mounts. (Lag bolts have a tendency to work loose. We recommend thru bolts if possible.) There are four mounting holes in the base of the unit that will accept 3/8" fasteners. Do not drill additional holes; the base is also a drip pan and its integrity will be destroyed. The angle of installation should be zero degrees, unless approved by Entec West, Inc.

A raw water thru hull dedicated to the exclusive use of the generator is preferred. It should consist of a sea cock with not less than a 1/2" I.D. hose connection, a sea strainer with cleanable screen, and wire reinforced hose that will not collapse from suction or bending. The EW-4200D unit has a hose barb for 1/2" I.D. hose on the front panel of the Sound Enclosure, or a 1/2" hose barb on the input of the Raw Water Pump (if the Sound Enclosure is not used).
 
It is possible to share sea cocks with other devices that require raw water, however the method used must be approved by Entec West, or the warranty will be void. Call us for consultation.
 
If the generator is going to be installed on a "high speed" boat, the raw water intake should NOT be of the forward facing scoop type. The ram effect of high speed planing may force water through the scoop and into the raw water cooling system. It is possible to force the water hard enough to fill the percolating muffler, back fill the exhaust hose, and flood the engine. There is only one way to avoid this; close the sea cock when the generator is not running. For convenience, a remotely operated electric solenoid valve can be used to protect the engine. Be sure to use a corrosion resistant valve compatible with the raw water.