Re: Water pump 175hp
Here you go, from another thread:
1. Remove the trim tab (right above the prop) Before you remove it, make some kind of mark so you know where to put it back. (It's not straight, if you will notice...)
2. Remove the nut that is hidden by the trim tab. Yes, many have not know this and done irreperable damage while trying to remove a unit while it was still there.
3. Remove the nut forward of this nut.
4. LOOSEN the two nuts at to front of the lower unit to the top of the threads on the studs. Wiggle the lower unit until it "drops down" onto these nuts. The reason you do it this way is because they sometimes stick, and if you have to put more force on it, you don't want to hurt yourself of the lower unit when it flies off.
5. After it drops down, remove the nuts and then slide the lower unit off.
6. If your engine has reverse lock, remove the plastic seelve at the top of the driveshaft. Look at it first so you know how to put it back.
7. Remove the washer at the top of the impeller housing.
8. Remove the nuts holding the water pump housing.
9. Remove the housing. Check the wear plate. If it looks like #@%&, replace it.
10. Slide the impeller up the shaft. You may or may not have to remove the impeller key to do so. I did not. If you are going to go deeper (into the actual water pump, you will have to remove it. YOu may want to remove it anyway, it's pretty small.
11. Check the wear plate below the impeller, see #9.
12. If you are stopping there, re-install the new impeller. Make sure turning the impeller turns the drive shaft.
13. Reverse your steps up to installing the lower unit. Grease the top of the driveshaft (the splines) and the shift shaft. DO NOT turn the shift shaft while you have the lower unit off. (If you want to know why, look up my thread titled forward/reverse backward. Title should tell you plenty about why to leave it alone!) Before installing it, I would also reccommend you blow through or run a small piece of 14 gauge wire through the outlet tube from the tell tale back through the water tube. A lot of time there are bugs/dirt dobber residue/crap in this hose.
14. When you are installing the lower unit, MAKE SURE you don't force anything! If you do it right, it slides right in. If you force it, you WILL break something. You may have to turn the flywheel by hand SLIGHTLY to align the splines. BE PATIENT. My first time, it went directly back on, second time took 20 minutes.
15. After installation, replace lower unit lube. The proper way to do this is to remove the vent screw (the top screw on the side of your lower unit labeled 'vent'), remove the bottom screw (labelled 'drain'). Pump lube into unit until it overflows out the top hole. Re-install the top screw. Then install the bottom screw as quickly as possible. Yes, you will lose a LITTLE. If it ALL runs out, try again. Do not try to fill it without the top screw removed, you will overfill it leading to larger problems. This is one of the few things I buy into the factory part issue, I use the quicksilver lower unit lube. It's $9 a quart in TX, but I have heard too many ppl. complain about lower unit problems when they used something cheaper. My 50 holds about a pint, so I'm guessing your 70 isn't much higher than that. Atwood makes a handy little pump they sell at Wally World hanging right above the Quicksilver lube. I think it was $7 totally worth it, IMO.
I probably left something off, but I know that's basically it. Best of luck to you!
Jacket4life
View Public Profile
Send a private message to Jacket4life
Find all posts by Jacket4life
Add Jacket4life to Your Contacts
#18 Yesterday, 03:14 PM
Jacket4life
Petty Officer 2nd Class
