waterpump?

[readyakira]

can someone give me some direction on how to remove the impeller on my 85hp johnson. I believe the year of the motor is a 77 as the model is 85etlr77s. I am quite new to boat motors, but there is nothing on a car motor I can't do. I am very mechanicly inclined and was hoping to get a service manual for this motor but my local boat store says there is no place to get one. I am kinda in a jam here as I have limited funds and only 4 more days to get this thing working. <br /><br />History of the motor. I just aquired the boat. The previous owner said last time it was ran was over a year ago. it was a saltwater boat. It seems to be very well taken care of as the hose look brand new under the cover. (cowl?) Well, upon hooking up muffs, I tried to start the motor and it started instantly. only problem is no water coming out of the motor except what is being pushed out of the side of the muffs. PLZ help. thanx

 

[boltbreaker]

Re: waterpump?

Iboats should have a manual!

 

[rwcreigh1]

Re: waterpump?

replace the whole pump not just the impeller.check ebay for the manual.good luck

 

[readyakira]

Re: waterpump?

got a manual on the way... in the mean time is it as simple as it seems? A few bolts to seperate the bottom? I seem to recall a friend trying this and having some problem getting it to seperate... should have kept in contact with him to find out whatthe problem was... Too bad my book won't be here by the time I was supposed to have this done <br /><br />OT: The boat when I got it had no key and I had to pull the ignition out of the control box.... Good thing I used to rebuild alternators and starters. Was good exp in how to get that little ball back in place that give the control that click feel

 

[McGR]

Re: waterpump?

Here's how you get the lower unit off:<br /><br />1.Disconnect the shift linkage under the carb. You need to loosen off the large bolt (11/16 hex head I think) that the two arms pivot on, then spread the arms apart for the linkage to separate from shift rod.<br /><br />2. Remove the 5 bolts clearly visible on the lower unit (2 on each side + 1 above prop)<br /><br />3. Remove the trim tab.<br /><br />4. Remove the bolt "hiding" under trim tab.<br /><br />5. Slide lower unit out. Note: There are two plastic sleeves used to align the two water tubes - don't lose these.<br /><br />6. Remove o-ring on top of drive shaft. Tape off spines on drive shaft with thin layer of masking tape to protect seal in w/p housing.<br /><br />7. Remove screws from w/p housing.<br /><br />8. Remove w/p housing.<br /><br />9. Slide off impeller<br /><br />10. Inspect housing and plate, if they are worn they should be replaced.<br /><br />12. Slide on new impeller. I usually lube mine with dishwashing liquid.<br /><br />14. Reinstall housing. You will have to bend the fins on the impeller to get it to fit. A thin layer of gasket sealer between the housing and plate is usually recommended.<br /><br />15. Place plastic guides in water pump housing to assist in alignment of water tubes. Replace o-ring and apply grease to driveshaft splines.<br /><br />16. Slide lower unit back in, reinstall screws and linkage.<br /><br />I hope this helps.

 

[readyakira]

Re: waterpump?

Hope that helps? I couldn't ask for a better rundown!!!! Thanks so much. This might put me back on schedule!

 

[Dave Abrahamson]

Re: waterpump?

That was a great explaination of L/U removal McGR.<br />It might just be a good candidate for the FAQ section.<br />Good luck readyakira.

 

[rodbolt]

Re: waterpump?

dont loose the tiny plastic bushing on the top of the shift rod. without it the unit wont shift properly and will self destruct if run that way. other than that its pretty close<br />make sure you dont alter the shift rod height or it wont shift properly.

 

[rayjay]

Re: waterpump?

I don't think these motors have the "pee hole" telltale. I know my 77 55hp does not. Evinrude didn't start using the pee hole until 78 or 79.

 

[rwcreigh1]

Re: waterpump?

make sure you install the impeller the right way.not sure which way on yours.

 

[Dave Abrahamson]

Re: waterpump?

Originally posted by richard 1:<br /> make sure you install the impeller the right way.not sure which way on yours.

Even if you do get the vanes on the impeller pointed the wrong way, it will straighten itself out when started. The new rubber is still pliable enough that it will conform to the cup. A little lube(or dishwashing liquid like McGR uses) might make things go a little easier.<br />Have fun and keep posting!<br /><br />Dave

 

[readyakira]

Re: waterpump?

Good Deal! I will take that all into account. There was no water in the two hoses that ran to each side of the motor, so I will be also checking for blockages where I can with much disassembly. I talked to my local boat shop today and they won't even touch a motor older then 85! I was warned from someone at the boat shop also to NOT turn the shift rod. <br />As for the pee hole, this motor has 2 holes, both in the back, side by side about 4in. apart that seem like they should be pusing water out. I could be wrong on this and will investigate further where they lead to.<br /><br />OT: This is by far the most responsive friendly forum I have found and I am very thankfull to everyone for all their help. Is there anything Else to look for other then water in the gear lube (that I am going to change) that I should be looking for?

 

[calm like a bomb]

Re: waterpump?

readyakira,<br /> While you are messing with it..check your plugs for correct gap and general condition.It's cheap enough to replace them if they are worn.I always carry an extra set on all my boats.Any of the pros on here can tell you the correct gap and temp for your engine.<br /> You may also have an inline fuel filter that is easy to swap out if you have any doubt about the age or condition of the one in the engine now.<br /> These guys can help you with any of it.Good luck.

 

[McGR]

Re: waterpump?

Hopefully you won't find any metal in there (like I did last year on my '76 85hp). If you do it's usually an indication of a larger problem in the gearcase. One other tip... replace the drain & vent screw/plug washers along with the lube. For a few cents this can save you headaches later.

 

[readyakira1]

Re: waterpump?

well, good news and bad news. I got the new pump installed on the lower unit. Now the bad news. the 2 copper tube that go up into the motor seem to be bent and corroded. this may be why I had no water coming out. what can I do about this? is my only option to replace them? if so, how?

 

[rodbolt]

Re: waterpump?

dave<br /> gotta ask ya to stop spreading misleading info. on that jonny like most all jonnys mercs and yams and zukis and almost all other outboards ther is not room for the blades to assume the correct position. if the vanes are installed incorrectly they stay that way and cause other issues. on the johnson,jabsco and sherwood type pumps some can be bi-directional. outboards since the late 50's are not. I do at least 10 a year that some DIYfer scwered up. new pump wrong way. will actually work at low speeds.<br /> ready<br /> try to carefully straighten them enough to engage the guides. replacement is a super beast.

 

[readyakira]

Re: waterpump?

I think I got it. The engine now spits some water out the holes. there isn't alot of water coming out but there is some. I loosened the hose at the back of the engine a bit and water sprayed out so it if puming water i guess. It runs a bit rough and maybe I will have to do a decarb. The carbs were re-done about 1&1/2 yrs ago and maybe I can just clean the bowls and run some seafaom in it? does seafoam hurt these engines? I know it works miracles in cars<br /><br />And yeah I think if I was to have to do those tubes it looks like more then I care to tackle for that motor <br /><br />Oh yeah the cover (looks like a cover) just below the engine only has one of the 4 little bolts holding it to the back have of that cover... is this going to be a problem? is that piece just cosmetic?<br /><br />Also one of the bolts going holding the bottom end on was stripped a bit.... luckily a tap and a very little bit longer bolt seems to be holding.

 

[historymaker78]

Re: waterpump?

this is awesome.....I am about to go outside tomorrow and tackle this same project......readyakira how long did it take you to drop the lower unit and replace that pump assembly....tryin to get an idea of what kinda time I need to alot myself.....also was it real obvious whick way the impeller blades had been turning (in refernce to putting it back the proper direction)?

 

[rdgallo]

Re: waterpump?

I also am getting ready to put a water pump kit in my 1994 Johnson 150. I have read several times on here to be careful not to change the shift rod length while doing this. Is it that easy to screw up the shift rod setting? I don't know what I will be looking at until I get started on it. I remember changing the impeller on my 9.9hp Evinrude many many years ago and only remember having difficulty hooking the shift linkage up after I finished the job. I think I had to have the motor either in reverse or forward and it took me awhile to figure that out. You guys do a really good job providing information. Thanks!!

 

[Walker]

Re: waterpump?

Its not easy to change the shift rod length by accident, just don't go screwing it in or out.