It is a Mercury 7.5 hp, 2 stroke, model 75, outboard
this should be all the info needed....
What is the procedure for changing the water pump on my boat motor?
It is really easy to remove the lower unit and replace your impeller.The
first thing to do is shift it into forward gear.Then on the underside of the cavitation plate by the prop there is a 1/2 inch nut to remove.After that there is another nut at the rear of the unit about 1 foot up from the bottom and it is a 9/16 nut.Once these are off the unit will come off.Then you need to remove the 2 7/16 nuts that hold the water pump housing on and you can then install your new impeller.When you are putting the unit back on make sure that your water tube goes back into the right spot.Hope this helps and good luck.
What is the procedure for changing the water pump on my boat motor?
Basic removal should be easy, on a Johnson, you remove the lower unit to expose the impeller on the pump, it is just below the water line on most of them. You should try to get a service manual on the motor. Maybe Amazon .com
put gear in neatral position then goe to lower unit and remove all cap screws bolting it on...also one under aluminum adjustable fin just above prop... follow shiftershaft ...usually external from main lowe unit housing .but there could be a window into casing on side....it wont come apart without undoing it...it may be in engine compartment but you should remember this while doing the removal ...! slide unit apart ..this will show you the covered housing..undo it and ...there is the impellar....replace with new one ..dont use any lube !
