Home › Forum › Ask A Member › 1980 Evinrude 85 hp trim and tilt
- This topic has 12 replies, 4 voices, and was last updated 8 years, 10 months ago by
mgsolakis.
-
AuthorPosts
-
July 15, 2016 at 2:08 am #4759
A week or two ago some of you helped me with my trim and tilt issues. I finally got it working good and it was fine all last week. I came back up today and hopped in the boat. I lowered the motor and it got about 3/4 of the way down before It stopped and would not go up or down. I can hear a click for both up and down in the relays. The battery is good I checked that first. All the connections look good and tight.
July 15, 2016 at 3:00 am #40231Well, just because the relays "click", does not mean they are working properly…Remember, both relays have to be in place and working properly or the unit will not go up or down. I would look at some of those spliced connections and make sure they haven’t failed first. Perhaps there is a bad ground to one of the relays. Hearing a click in both directions would seem to indicate that the trim switch and wiring back to the engine is OK though…
Temporarily direct wire the tilt motor to ensure it has not failed….July 15, 2016 at 12:20 pm #40246Ok I will check the motor again, perhaps under stress of use it has failed. If it is good I will check all of the splices and get back. Thanks.
July 15, 2016 at 2:22 pm #40249Hope it is something simple, I wish I had a wiring diagram to post for this system….It is kind of confusing, but makes sense once you see how it works…
July 15, 2016 at 2:46 pm #40250There are tests to check the Hella relays, but it’s probably too complicated for me to explain here. Not hard to do, just a little complicated.
July 15, 2016 at 4:49 pm #40261Well bad news, looks like it’s the trim pump. I connected the pump directly gave a couple of taps with a hammer to the pump and got a soft gurgle of motor noise and then nothing again. So I guess the backbreaking question is can you change the pump without taking the motor off the boat?
July 15, 2016 at 5:06 pm #40262When you say "trim pump", I’m assuming you mean just the trim motor, correct?
First, was this trim unit used in salt water? If so, you will probably need some help from the torch to loosen the three screws securing the trim motor, which means removing the engine.
The newer engine stern brackets/trim units could supposedly be removed from the engine without taking the engine off the boat, but you would probably have to loosen the engine mounting bolts at least to loosen the stern brackets "grip" on the trim unit.
There are three phillips screws securing the trim motor, one of which is definitely not accessible from behind. I guess if it was me, I would try to loosen the screws before removing the engine to see if they will come loose. Remove the engine only if you have to. You won’t need to remove the steering cable, just back the engine away from the boat a bit so you can get at the hidden screws….Be sure to get a new oring for the tilt motor and grease up the screws before securing the new tilt motor. You can use dexronII tranny fluid to refill the unit when some spills out during tilt motor replacement. Just remember that the unit should be filled when it is in the UP position, be sure to engage that trailer lock before messing around under there….July 25, 2016 at 12:11 am #40855Ok, so my trim motor arrived. After some trouble getting the boat out of the water (ill spare you the details) To get at the back bolts I loosened the bolts holding the middle part of the transom clamp to allow it to pivot some. Then I made an attempt to change the trim motor. I had some trouble lining up the pin on the new motor with the grooves on base. I think I eventually got it but I’m not sure. The screws did finally line up. We lost some fluid in the process. I hooked up the electrical and gave it a go. The motor came on but the rams did not move. So the possibilities are: 1) I did not infact get it lined up or 2) we lost so much fluid that we need to ad more before it will move. Also Don you mention using Dexron II tranny fluid. I have some hydraulic jack oil (ISO AW32) would that work or should I stick with the tranny oil.
July 25, 2016 at 6:10 am #40886When I worked at Hynautic (marine hydraulic steering systems) we used AW-32 to test every helm after assembly because it was easier on worker’s hands. But when the installer put it together in the boat he was supposed to use aircraft hydraulic fluid, with Dexron II as an acceptable substitute if aircraft fluid not available. So I guess that infers that all are chemically compatible. But not all the "same". Think about an airplane–one minute it may be sitting running on the ground in 120 degree heat, and 10 minuets later be in sub freezing temperatures at thousands of feet. Put in boat-speak, that means the #32 could cause stiff steering in cold weather. Power trim systems?? I dunno, probably be ok, but I’m not an engineer.
July 25, 2016 at 10:36 am #40894I don’t think I understand what you are referring to when you speak of "did in fact get it line up"… Get what lined up? Yes, the flat spot on the trim motor shaft has to line up line the slot in the pump. But, the trim motor would not have dropped into position if this was not lined up, unless the little connector shaft/pin fell out of the pump. This is not very likely unless you turned the unit almost upside down while doing the job.
Did you see where the trim motor shaft should line up with the trim pump?
I would surely try adding more fluid before ripping the unit apart again, remember the unit can only be filled when the unit is in the up position, so be sure to engage the trailer lock to avoid injury.
As for the fluid, well I know nothing about the chemical make up of this stuff….So, I would use only the OMC trim/tilt fluid or the dexron II tranny fluid. You surely don’t want to create a real mess with the wrong fluid. -
AuthorPosts
- You must be logged in to reply to this topic.
