Humminbird 400 id 用户手册

aluminum  boat locate the template on the transom between rows of rivets, or ribs that 
are on the bottom of the boat. Align the template so that  the bottom corner of the 
template nearest the center of the transom is on the bottom edge of the transom. 
 

 

 
Once the location is determined mark and drill three 7/64” dia.. holes noted on the 
template. Attach the metal bracket using three #10 self threading screws supplied. Be 
sure to align holes in the center of the  
Bracket slots. On some aluminum boats it may be necessary to use a wood back-up 
plate. It is important to use a silicone sealant between the screwhead and bracket in 
order to prevent leaking. (See Figure C) 
 

 

 
Step 2. 
BRACKET INSTALLATION (Fiberglass Boats)- If  your boat has a stepped transom 
located below and under the main transom, the compact transducer design allows 
mounting in this area. This mounting location is recommended for good reading at very 
high speeds. (See Figure D) 
 
To install the metal bracket on a fiberglass boat, locate the template on the transom in 
the same manner as for an aluminum boat. (See Figure C)