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Equipment & Gear => Power Equipment & RV => Topic started by: lineman125 on April 14, 2014, 09:24:15 PM

Title: changing my outboard water pump ( need help )
Post by: lineman125 on April 14, 2014, 09:24:15 PM: I have a 1991 evenrude outboard 25hp long shaft. I have taken the 4 bolts off the lower unit and cant figure out how to disconnect the shift linkage. It will drop down the furthest in reverse but that is still only 2 or 3 inches ?? Any help or input would be greatly appreciated !
Title: Re: changing my outboard water pump ( need help )
Post by: j_h_nimrod on April 14, 2014, 09:38:54 PM: You need to pull off the two strainer covers. Inside there is the shift shaft with a nut that yo can unscrew to complete the separation.

Be careful putting I back together. There is the copper water circulation tube that bends easily and will really screw you if it does not reseat correctly.
Title: Re: changing my outboard water pump ( need help )
Post by: TONTO on April 14, 2014, 10:23:29 PM: Quote from: j_h_nimrod on April 14, 2014, 09:38:54 PM
You need to pull off the two strainer covers. Inside there is the shift shaft with a nut that yo can unscrew to complete the separation.

Be careful putting I back together. There is the copper water circulation tube that bends easily and will really screw you if it does not reseat correctly.

:yeah: it is the shift linkage holding it together, why it drops down when you put shifter in reverse. When released the drive shaft should slide out of the powerheard and drop out atached to lower unit.
Title: Re: changing my outboard water pump ( need help )
Post by: lineman125 on April 14, 2014, 10:28:08 PM: thanks guys, i'll give it another go tomorrow ! searched allover youtube and the rest of the net... should have started here :tup:
Title: Re: changing my outboard water pump ( need help )
Post by: lineman125 on April 16, 2014, 08:28:21 PM: got it tore down, changed the impeller, reassembled and still no piss stream.... tore it down again made sure water came through the ports in the lower unit. The copper line is clear, I can blow air through the port on the motor head where the rubber hose connects to :dunno:
Title: Re: changing my outboard water pump ( need help )
Post by: HUNTINCOUPLE on April 16, 2014, 08:34:23 PM: This isn't good! The fish are coming, the fish are coming! :chuckle:
Title: Re: changing my outboard water pump ( need help )
Post by: lineman125 on April 16, 2014, 08:49:28 PM: I know these things !! told the wife I was just gunna run down and get a Honda 4stroker, she says "sounds good how much" then I told her, guess what we're not getting !?!
Title: Re: changing my outboard water pump ( need help )
Post by: kenzmad on April 16, 2014, 09:05:22 PM: Check the thermostats. Plugged passages can and will stop the telltale stream. Also, run a coathanger up the pee stream hole. Salt will plug it up and stop the stream.
Title: Re: changing my outboard water pump ( need help )
Post by: lineman125 on April 16, 2014, 09:24:15 PM: thanks for the help kenz. Im just getting frustrated at this point, what I thought would be a fairly easy diy project is becoming a chore !
Title: Re: changing my outboard water pump ( need help )
Post by: norsepete on April 18, 2014, 03:22:28 PM: Changed my thermostats and went from a dribble to a steady steam.
Title: Re: changing my outboard water pump ( need help )
Post by: lineman125 on April 18, 2014, 10:42:03 PM: got it pumping water tonight till I wrapped it out, then it spits, farts and stops peeing till I get it back down :dunno:
Title: Re: changing my outboard water pump ( need help )
Post by: j_h_nimrod on April 18, 2014, 10:56:41 PM: Is it on the boat in the water or are you running I with muffs? Have had problems with muffs nut supplying enough water before.
Title: Re: changing my outboard water pump ( need help )
Post by: lineman125 on April 18, 2014, 11:29:50 PM: just got the muffs on it now. it is shooting a 10' stream till I crank on it, then falls on its face !?!
Title: Re: changing my outboard water pump ( need help )
Post by: j_h_nimrod on April 19, 2014, 07:31:51 AM: The water pump speed is directly related to motor RPM the more you crank it up the more water it is pulling. Some muffs don't put out all that much so you may be short on water. I would recommend trying it in the water or if possibly get the lower unit in a big trashcan or tote of water and try running it again.

We had a number of there motors over the years and one of them started acting like yours and I never could figure it out the problem. It continued to run great but just had a weak tell tell. I checked cooling water temps an they were always in range so we just ran it, last I knew it had been replaced but was still running. It can be frustrating trying to figure these problems out though.
Title: Re: changing my outboard water pump ( need help )
Post by: lineman125 on April 19, 2014, 12:07:25 PM: thanks for all the help nimrod ! I tried your trash can trick and she runs like a top :IBCOOL: I'm thinking the muffs were just a little to loose. Anyhow its greatly appreciated when I guy can get a few pointers and save a ton of money !!!