• If this is your first visit to the iboats.com Boating Forums, be sure to check out the FAQ. To post a question or comment, begin by signing up. To start viewing messages, select the forum that you want to visit from the selection below.


Announcement

Announcement Module
Collapse

Help Tip: If you have a question that has not been answered to your satisfaction in the archives, it is always best to start a new thread of your own. By starting your own thread, you will receive the maximum number of views by forum members.

Below are some additional forum policies in hopes of all iboats members will follow, Thank you.

1. Please do not reply to old topics or hijack existing topics. Old topics of a technical nature are like a library book, Please do not write in them.

2. Old topics should be considered archives and used for reference only. Please do not reply to them.

3. Do not take over someone elseís topic (aka hijack) with your own question, even if it is similar. If you have a question that has not been covered to your satisfaction in the archives, it is always best to start a new topic of your own.

4. If you have a question for the original poster (OP) and the topic is over 30 days old, send the OP a PM, he may not even visit the forums any longer, or may not notice your question in the old topic.

5. By starting your own topic, you will receive the maximum number of views by forum helpers that may not even notice your question when itís posted at the end of someone elseís topic. And those answers will be specific to your particular issue.

6. Please do not post to topics that have been inactive for more than 3 months unless you are the original poster. We have very active forums and any topic that remains inactive for that long should be considered "dead". It is especially confusing when there is an entirely new question posted to an old topic.

7. Posting at the end of any topic is considered to be hijacking the original posters topic which in turn subjects the topic to be closed if it continues to happen thus not making it fair to the original poster in the future had for some reason he/she needed to return for additional information or provide an update of the problem solved which is always welcomed within a reasonable amount of time frame.

8. Please note that you should see a red banner pop up near the bottom of each inactive topic asking you not to reply to old topics. The Red banner will read: Please note this topic has been inactive for 90 days. For the best results, please start a new topic.

Thank you all in advance for doing your part in helping iboats run a smooth ship.

Additional forum rules linked below.
http://forums.iboats.com/forum-rules-guidelines-405/
See more
See less

Schematic for Tilt/trim pump for old OMC.

Page Title Module
Move Remove Collapse
X
Conversation Detail Module
Collapse
  • Filter
  • Time
  • Show
Clear All
new posts


  • Schematic for Tilt/trim pump for old OMC.

    Hi ladies and gentlemen,, I have a small problem I thought I might enlist you help with if possible..The manual relief on my tilt/trim pump, (its off a Evinrude 85hp 69 model..) seems to be letting fluid through even when in the lock position... I am assuming its probably an O-ring worn or something..So, before I go tearing into this thing to find the part that needs replacing. I thought i'd ask you good people if you knew what was down there or had a schematic I could see?????Is this a common fault on these things?Any tips would be fantastic...kindest regardsFranki


  • #2
    Re: Schematic for Tilt/trim pump for old OMC.

    Hi FrankieI got a schematic on the way. check your email. Sorry, I have never worked on one of these units, so I know nothing about them. Let me know if the schematic is the right one.

    Comment



    • #3
      Re: Schematic for Tilt/trim pump for old OMC.

      Hi Alcan, Yes, that does look like the right schematic...however, it doesn't seem to have the manual override on this one.. its like a wheel with a allen key in the center.. and its down the bottom of the pump unit.. (facing backwards from the boat).. All I can assume is that some of these had the manual release, and some didn't???Do you have the 70-72 books there?? do any of them show a manual release where the pic I just sent you indicates???Thanks again Mr Alcan, Might I ask where you got all these parts lists? were you a dealer? or are you a dealer? :-)regardsFranki

      Comment



      • #4
        Re: Schematic for Tilt/trim pump for old OMC.

        Be sure the fluid is up in level. There is an o-ring on some manual valves that get sheared when removed to far out. Might allow air in unit. Try raising the leg mid-way. THen grab hold and force it up and down as hard as you can several times. Sometimes the main hydr. valve gets junk in it, and this can purge it if lucky...
        Alias "schematic"

        Comment



        • #5
          Re: Schematic for Tilt/trim pump for old OMC.

          Thanks Schematic..I have completely replaced the oil.. the stuff that was in there looked pretty sad..It goes up and down very well, just slowly sinks when you put it up...I will try forcing it up and down hard tomorrow..If I can avoid taking it apart, I'd be very happy...When I got it, someone had wrapped wire around the manual release, holding it hard in.. stupidly enough, I decided I'd like a manual release, so I cut the wire.. (put it back again, but it made no difference for me..) I think I will probably pull the pump down if forcing it up and down doesn't work.. replace every O-ring I find in there..Thanks for the suggestion.rgdsFrank

          Comment



          • #6
            Re: Schematic for Tilt/trim pump for old OMC.

            Hi FrankieGot my pick and shovel, I'll see what I can dig up.

            Comment



            • #7
              Re: Schematic for Tilt/trim pump for old OMC.

              Thanks mate..much appreciated...rgdsFrank

              Comment



              • #8
                Re: Schematic for Tilt/trim pump for old OMC.

                shouldn't need to pull apart. the valves are accessable from outside on most
                Alias "schematic"

                Comment



                • #9
                  Re: Schematic for Tilt/trim pump for old OMC.

                  Hi FrankieNear as I can tell, the manual let down valve started in 1974. As I only have those parts and accessories catologs on micro fitche. I don't have a way to send them yet. So I'll send you the next closest a 1976. They are pretty close. No, I am not a dealer nor have I ever been one. I got started working on outboards as a kid (along with just about everything else)as a way to make sure my older brothers would make room for me in the boat. Over the years I have bought, scrounged, traded and was given my lititure. A few years back I considered buying a professional shop. But then I would have to work. That would ruin a perfectly good hobby. By the way I have nothing but respect for the pro's. I'll bet your motor looks like a million bucks with the new paint an all. I might be a little crazy, but it seems like they run a bit better when they look good. Have fun.

                  Comment



                  • #10
                    Re: Schematic for Tilt/trim pump for old OMC.

                    Hi again..Alcan, that new schematic you sent doesn't look anything like mine except for the relief valve, what we are chasing is one like the first one, with the relief valve from the second one.Schematic, I tried to do the up and down force thing.. (its not mounted on a boat, so its hard,, I made up a mounting frame and board and bolted the outboard to that..)It does seem to have slowed things down a great deal,, its very slowly sinking now, and its very very hard to force down.. (I put about 50KG on it (the lower unit..) and it hardly moved.)I'm thinking that you are right about gunk in the system.. but the other reason it may have slowed down is the hoseclamp I put around the manual release the other day to hold it in.. (it wasn't making alot of difference then, but who knows now.)Since I am getting the rams rebuilt for free.. I might as well replace all the o rings in the pump as well.. I'll see how I go I guess..I really just want the **** thing to work..Why must I fight this thing every step of the way?thanks once again for the tips and piccys.. :-)rgdsFrank

                    Comment



                    • #11
                      Re: Schematic for Tilt/trim pump for old OMC.

                      Frank, right now this engine is a pain in the *****, but seriously, look at the experience you are getting. You will be much wiser for it. The knowledge you gained is priceless. I mean it.
                      Alias "schematic"

                      Comment



                      • #12
                        Re: Schematic for Tilt/trim pump for old OMC.

                        Thanks Schematic.. I agree entirely...Its now quiet apparent that I know much more about old V4 OMC's then I ever wanted to..I picked up this thing cheap at a place 400km from my home.. It hadn't run in 7 or more years.. kept in a carport, most of the paint was gone, the powerpack was clagged, cowling had holes in it and looked very sad, gearcase was stuck in forward only.., and someone had taxed the tilt/trim pump and the rams were all siezed.. and all the bolts/studs/pins in the mounting brackets for adjustment and tilt/trim stuff were locked solid..Since I got it I have spend around 500-600USD on it.. it has a 7 layer brilliant white paint job that looks perfect.. new powerpack, external temp guage, overheat buzzer swapped for relay and car horn, new impeller, the carbs have been stripped and cleaned four times, (trying to fix the overflow problem I had) I got a tilt/trim pump for it, (hense this thread in the first place) changed the fuel pump, fixed the gearcase issues.. replaced alot of the wiring, cleaned/tidied connections I didn't replace, added a wiring loom to go between controller and dashboard, had a chip filled in the prop.. and did the water and then OMC decarbs... its purring like a kitten now. (added new impeller and plugs also)Its been a long run, and now its at the point where I have spent as much on the motor as it is worth in Australia,, so I am hoping to spend as little as possible from now on.Its definately been a learning experiance.. as was the Lark40 I used before this one..(which I have stripped completely for various reasons.)I love boats, I love talkin about them, I love building them and I love helping people with them,, I am starting to think I should give away my programming job and get a boat related job...regardsFrank

                        Comment



                        • #13
                          Re: Schematic for Tilt/trim pump for old OMC.

                          if you work on something for a living.....often the glamour and glitten are gone......it'll be just another day at the office.....enjoy while you can, how you can....
                          Alias "schematic"

                          Comment



                          • #14
                            Re: Schematic for Tilt/trim pump for old OMC.

                            I'm not real sure about your leak-down problem you discribed but (according to the Evinrude maneal) some of the older 'rudes lower units were suppose to slowly drop down when in the tilt position and stop when they reached the trim position.c/6Hooty

                            Comment



                            • #15
                              Re: Schematic for Tilt/trim pump for old OMC.

                              Hi Frankie The 1974 picture is the one you need. But I can't send that one. So I sent the 1976 picture. True, is a different unit,but the let down valve is close to the same. If you need part #s for the 74 valve, I could post them. Like Schematic says, when you don't have to do this work to eat, it can be enjoyable, sorta like golf.

                              Comment

                              Working...
                              X