I know this is a fairly simple install but it may be useful for some people
tools:
10mm socket
17mm socket
fillips screwdriver
normal screwdriver
and some pliars
the car:
this install is being done on a 93 civic, but should work on just about any civic/teg 89-00 with only slight differences in removal of pump
start off by removing the back seat, in the 92-95 civic there is a 10mm bolt holding the seat down. fold the seats down to reveal the bolt
once the bolt is out pull the seat up and then forward to remove it. you will now see the pump cover, remove it to reveal the top of your gas tank and the pump housing
disconnect the the plug under the boot, remove the banjo bolt using a 17mm wrench as well as all the 10mm bolts around the housing, and remove the return line carefully using pliers to remove the clip holding the line on. be careful not to loose the crush washers under the bajo bolt, or to damage any lines
pull the pump up and forward at about a 45* angle from the top of the tank, let the fuel drain out out the filter and also flip the pump upside down to drain any fuel from it
comparing the two pumps you can see the walbro is slightly larger
remove the old pump by removing the filter on the bottom, there is a circular retaining clip you can see in the later pic, then remove the factory hose clamps and pull out the hose and pump. should be left with just what holds the pump in the tank
put one and of the supplied hose onto the line and tighten that end down well with the provided worm gear, then put the walbro dext to the line and eyeball/mark where the line should be cut.
cut the line, slide a worm gear clamp on, and attach the line to the walbro, slide the walbro into the stock assembly and insert the runner pump isolator from the stock pump under the walbro 255 so it doesn't vibrate or hit against metal when in the tank.
next up put the fuel filter sack thing on, it will fit just like on the stock unit. slide the retaining ring on using a screwdriver to push it down as far as you can.
reinstall the new pump,tightening the bolts in a star pattern to seat the seal on the top of the tank well, before putting the seat on turn the car over to make sure there are no leaks and prepare for your tank to be drained much faster