1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

[firstboat25]

Hey guys <br /> <br /> Well I changed the water pump on the motor and today is the first day took her out on the water <br /> She is pumping water great however <br /> When I put motor in drive and start to idle up she seems to start slipping and banging then she will clear up and start going with no problems so I kept her out when I was on my way back into the launch she start slipping and banging as soon as put into to gear <br />Does it sound like she is low on gear oil ? <br />Thanks in advance for all the help guys

 

[emdsapmgr]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

Sounds like the lower unit clutch dog is not engaging the forward gear properly. Possible that the shift linkage has moved during reassembly. Try adjusting the shift linkage next to the carb first. If this adjustment does not help, you may need to remove the lower unit again and reset the height of the shift rod.

 

[ezeke]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

Sounds right, except that the shift rod on the 1975 model is only adjusted at the top by the small cylindrical swivel. If the link is disconnected you can turn the swivel with a stiff wire with a short 45 degree bend at the end without removing the gearcase. <br /><br />Forward gear is the downward movement of the shift rod. <br /><br />Put the motor in forward gear, disconnect the cable, and assure that the shift rod is down completely without the horizontal linkage touching the floor of the lower cowl. Then adjust the cable to the connection and reconnect it.<br /><br />BTW, don't gamble on the gear oil. Check it. This is a hydraulic shift assist. It won't work right without oil and it can be harmed by water.

 

[firstboat25]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

Hey guys thanks for the info <br />My other question is I know that water is getting into the lower unit boat sat for many years I was told to pull the propeller and replace the O-rings in there any ideas what the rings are called where they are located and were I can get them also are they hard to change <br />thanks guys

 

[KYHunter2]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

You'll need a manual.<br /> <br /> If you do have water intrusion.<br /><br /> You can do a pressure test.<br /> <br /> Then reseal as needed. <br /><br /> Sounds like, whoever, was talking about prop shaft seals.<br /> <br /> i-boats, may have them.<br /> <br /><br /> Or, you should be able get the parts, at any J/E dealer. <br /><br /> As far as hard, if your mechanically inclined. And get a good manual , you shouldn't have a problem.<br /><br /> <br /> <br /> Good-Luck,<br /> <br /> KYhunter

 

[emdsapmgr]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

A lower reseal kit will come with the two propshaft seals, new shift rod seal, carrier o-ring, and upper drive shaft seals. You will need to drop the lower to install this kit.

 

[firstboat25]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

Hey Guys <br /> Well I checked to make sure the rod is going all the way down and it seems to be the arm is basically touching the housing I did add gear oil though as she was low is it safe to say that was the problem or do you think it is still in the cluch rod ?<br />thanks for the help

 

[ezeke]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

I think you still need to try to get a little more length in the shift rod if the horizontal arm is actually hitting the floor of the lower cowl. This will allow the shift rod to fully engage the gears below. <br /><br />Just release the swivel again and try to turn it counterclockwise with a stiff wire with a little bend at the end. It will take a few minutes of going back and forth, but it is usually quicker than removing the whole gearcase.<br /><br />Adding oil to the gearcase is not good enough. If you know that the unit is leaking, you need to fix it. If it is not leaking, you should have drained it and put all new gear oil in it. You said previously that you knew there was water.<br /><br />In case you are not aware of the economics, click on "Lower Units" at the top of this page and have a look at the prices of rebuilt units.

 

[firstboat25]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

Ok so basically if the arm is hitting the lower cowl then the rod needs to come up correct ? please bear with me I haven't had to deal with anything like this before any idea about how many turns I should give the rod would one full turn be good ?<br />thank u very much for all the help

 

[firstboat25]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

Also on replacing the seals in the lower unit to stop the water looking on i-boats I found a -Gear Housing Seal Kit is this the seals and gaskets I need or am I looking at the wrong parts <br />Thanks again

 

[ezeke]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

The swivel needs to come up so that the shift rod can go further down. Turn the swivel counterclockwise. <br /><br />I have never used the Sierra seal kit on this lower unit, so I can't tell if it's good or not. I know the OMC/BRP one is good. Someone who has tried the Sierra will probably jump in here.

 

[firstboat25]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

Ok no problem however though that is the correct name for the kit and it should be the correct kit? <br />I just didnt relize how many gaskets and o rings there were lol

 

[firstboat25]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

Hey Guys<br /><br /> Well I did turn the rod and bring rod up took boat down to lake and as soon as she started to throttle up she would slip and bang so I brought rod up more this time I think all the way tried again she did the same thing so I left her in slow speed and she sounded horriable the motor was shaking and the fumes were terriable <br /> So when I got home I drained the gear oil no sign of water in it this time but then spun the prop by hand and you can hear a noise that sounds like maybe a bearing ? any idea of whats goin on <br />Thanks

 

[firstboat25]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

Also guys now when I try to put it in reverse she does nothing either

 

[ezeke]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

I think that you have lost a gear and that you will have to open the gearcase and repair it.<br /><br />You cannot turn the shift rod. If you did you would break something.

 

[firstboat25]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

sorry about that I meant that I turned the swivel <br /> any idea what could have caused this problem all of a sudden ?<br /> This motor wasnt taken care of before I got it so im kinda goin with the flow.

 

[firstboat25]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

HI <br /> Im looking on ebay for a used lower unit and found one from a 1979 Evinrude 50 HP Hydraulic Assisted any idea if that unit will bolt up and work on my engine ?<br /> Alsp there is a Evinrude 1977 140S V4 lower unit any idea on that to <br /> Thank you so much for the help

 

[ezeke]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

The 50HP unit will defintely not work.<br /><br />The 140 probably will not work either. Find out if the skeg slants back or goes straight down like yours does.

 

[firstboat25]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

Hi Again<br /><br /> well I found a lower unit on ebay again this one looks like it will work however not sure here is the info EVINRUDE 85 HP LOWER UNIT<br />ENGINE NUMBER 85493B any ideas ?<br /> the item number on ebay is 4638237373 if anyone wants to take a look <br />Thank you so much

 

[firstboat25]

Re: 1975 115HP EVINRUDE -LOWER UNIT HELP PLEASE

Also guys will a lower unit off a 1988 johnson or evinrude work ?