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Old 04-05-2005, 12:29 PM
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Default water pump replacement johnson 115 v4

how hard is this to do. i read the manual and it seems strait forward. does anyone have some advice? do you need to buy something to sea the lower unit when you put it back on?
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Old 04-06-2005, 08:56 AM
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Default RE: water pump replacement johnson 115 v4

anyone?
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Old 04-06-2005, 09:01 AM
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Default RE: water pump replacement johnson 115 v4

I think the hard part, if there is to be one is pulling the lower unit off. Sometimes those bolts get rusted on and they have to be cut/torched off.
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Old 04-06-2005, 01:28 PM
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Default RE: water pump replacement johnson 115 v4

I had a 120 Johnson looper. This is a crappy project. Trust me on this. There's a rod that goes up from the foot, to under the powehead. This rod is your gear shift. It has a 90 degree bend at the top. You will have to remove the lower cowling halves off the motor to see where this rod ends and, disconnect it before dropping the foot. I would reccomend putting the engine in one gear or the other before attempting this. Get instructions if it all possible that detail the exact gasket placement, since there's like a million of them. When it comes time to re-install the foot, that's when you really start to love that 90 degree bend. Assuming you can get the rod through, then you'll have to re-thread the miserable little bolt that goes from the shifting mechanism to the rod. It's been two years since I've done one, my new motor is a Mercury. The water pump design is a major reason I won't own an OMC engine.
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Old 04-06-2005, 05:07 PM
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Default RE: water pump replacement johnson 115 v4

The job is pretty straight forward as you said.* I'll agree that the tough part is reconnecting the shift rod.* The shifter should be in forward.* Once you get the lower unit up in place, what I did was take a coat hanger and bend the end into a hook.* At the top of the shift rod is an eye.* Just catch it with the hanger and pull it up into place.* If the engine has gotten regular service, there should be no issue with the mounting bolts.* If the bolts are hard to get off due to salt, warm the area above the bolt where it screw in with a propane torch.* You shouldn't have to burn off the paint.* The heat will melt some of the salt.* Don't force them off or they'll break off.* The salted bolts are a case of real bad neglect.* Good luck.



P.S. don't forget the bolt under the trim tab.
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Old 04-07-2005, 07:31 AM
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Default RE: water pump replacement johnson 115 v4

the manual says put the gear in reverse then drop the lower unit, i didnt know you have to disconnect the shifter from the lower unit?
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Old 04-07-2005, 03:49 PM
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Default RE: water pump replacement johnson 115 v4

Sorry, my mistake.* Should be reverse.* If you don't disconnect the shifter you won't be able to drop it.
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Old 04-07-2005, 09:10 PM
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Default RE: water pump replacement johnson 115 v4

Snap On makes a really nice flex 1/4" extension that helped a lot when I changed a Johnrude impeller.
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Old 04-18-2005, 02:16 PM
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Default Re: water pump replacement johnson 115 v4

I have an 88 Johnson 150 and am facing the same dilema. There is no way to get to the shifting linkage bolt, under the lowest carb to detach the shifting rod.. I can see it, but cannot get a socket/flat head screwdriver to it. Can I lower the bottom half of the cowl (boat is 1 1/2 hrs away, or i'd go look at it)? Also I'm assuming that I do not completly remove the bolt but just enough to get the rod to slide out. I could never get my hands in there to put it back in if it fell out. This design seems real bad for something that has to be done each or every other year. Maybe its just me
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Old 04-18-2005, 03:00 PM
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Default RE: water pump replacement johnson 115 v4

I just take the lower engine cover off of mine to get at the shift rod bolt. On the V-6's there are 4 bolts, all accessed from the starboard side of the engine. Two are straight forward and hiding in pockets that require a socket extention to get to. The two others are hiding in the cavities where the latches holding the upper engine cover to the lower engine cover are.

After you take the lower off you can just about get your hand around the shift rod bolt.

P.S. this makes it A LOT easier to reallign the shift rod when putting it back together.
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Old 04-18-2005, 03:31 PM
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Default Re: water pump replacement johnson 115 v4

Online, you are the man, Thanks, B
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