| Sterndrives.Com | Mercruiser Sterndrive Information | |||||
|
First remove your boats battery as so the engine won't crank and injure you. I know,
it sounds corny but just do it.Stick your head down into the bilge and take a close look at how the two hoses attach
to the back of the water pump rear housing. If you accidentally reverse these hoses when installing the pump,
you will ruin your new impellar. Label both hoses and draw the configuration on a note-pad so that when you go to
reassemble the pump to the engine you won't get the hoses reversed.Look to see if you have a fuel pump mounted to the side of the water pump. If you have a fuel pump mounted to the side of the water pump,
you will have to shut off your fuel supply at the fuel tank.
Failure to close off your fuel tank could result in damage, injury or death.
I know... it sounds corny but just do it.
Once your fuel valve is closed and you know that you have already removed the battery from the boat, it is safe to proceed.Use a good 3/4" Flare Wrench and loosen and remove all the metal fuel lines.
This will allow you to remove the water pump with the fuel pump still attached.Use a slotted screw driver or a 5/16" nut driver and loosen the hose clamps that hold the large fat
thromostat hose in place. Remove the hose. This will give you better access to the Main Bracket's mounting bolts.If neccessary, remove the Circulation Water Pump from
the front of the block to allow for the removal of the upper Main Bracket bolt.Use your slotted screw driver or 5/16" nut driver
and loosen the clamps to the two water hoses on the back of the Raw Water Pump. Try to pry off the hoses without destroying them.
If the boats in the water don't forget to install and secure a plug in the water intake hose. Removing these two hoses from
the back of the pump can be difficult. Sometimes it's better to get the pump pulled away from the engine first.Remove the bolt from the port end of the Brace. This bolt
is located on the port front side of the block.Remove the lower bolt from the Main Bracket and lift the pump out of the bilge.
Go into your garage or shop and grip the pump by the Main Bracket in your large vise with the hose fittings facing straight up.
Scribe marks on the pumps housing down to the Main Bracket as so you will be able to align the pump to the Main Bracket during reassembly.
Don't clamp the pump itself or the pumps pulley in the vise or you will damage it.Remove the five screws that hold the rear pump housing to
the front pump housing and remove the rear housing assembly. The impellar might come off with the housing, that's OK.
Pop the impellar out of the housing and give everything a good inspection.
Grease up your new impellar. Make sure your oring is in place.
Place the impellar on the shaft with a new key. Grease up the inside of you impellar housing. Lower the housing down over the
impellar while turning the pulley in the correct direction. Install the fasteners being careful not to
over-tighten them. Install the pump onto the engine and your done!
| ©2004 Sterndrives.Com •Email • About Us • Home • Return Policy | • Mercruiser Help • Shop Manuals • Search • Contact |