70 Merc 3 cyl tilt/Trim motor removal - PICS

[Grant Brown]

The power tilt/trim motor on my 1987 Merc 3 cyl is shot. It is the type with the motor attached to the pump in between the transom brackets. Well, I got the outboard motor off the transom, turned it "very carefully" and got the 2 bolts out of the pump motor housing.
Now I am having trouble taking the housing off the pump. I've tried prying it carefully, and tapped the top sideways with a hammer and a block of wood. It's still not budging.
Is the drive shaft of the pump motor pressed into something?
Is there any trick to removing it?

Thanks,
Grant

 

[EDDYSTONE EEL]

Re: 70 Merc 3 cyl tilt/Trim motor removal - PICS

Hi

Not an expert but I have a similar outboard ( Merc 80hp 1990ish) with the same set-up

My main tilr ram was leaking (and still is) so I removed the whole unit. I think if I remember right the 4 bolts/screws at the top of the pump motor lead right down to the housing might be worth looking at to see if thats right or now

As I said im NO expert so might be better to wait for some one who has some knowledge.


I fitted mine back on only to find it leaking still on the upwards motion so I have to top it up every month until the end of the season when a "expert" can do it for me. I think that must mean the bore is warped or the housing is marked.

 

[EDDYSTONE EEL]

Re: 70 Merc 3 cyl tilt/Trim motor removal - PICS

Actually scrubb that

Wrong motor

Just looked at the manual for my trim system and it shows the following

"quote"

IMPORTANT: The pump is not rebuildable. If pump
is defective, replace as an assembly.
NOTE: Power Trim assembly does not have to be removed
from engine to replace pump.
1. Disconnect trim pump motor wires, and remove
starboard transom bracket from engine; refer to
?Removal? instructions in ?Power Trim Assembly
Removal and Installation,? preceding.
Unseat motor and pump assembly from housing
as follows:
OPERATIVE TRIM MOTOR
Loosen 2 bolts until 1/4
(6mm) of each bolt is exposed.
Do not remove bolts.
18458
a
a
1/4,
1/4,
a - Bolts
Tighten manual release valve to full right (clockwise).
Operate trim motor in ?Up? direction by connecting
trim motor wires to a 12-volt battery [BLUE wire to
POSITIVE (+) terminal and BLACK wire to
NEGATIVE (?) terminal].
Slowly remove fill screw to bleed pressure from
reservoir.
From a full closed (clockwise) position, slowly turn
manual release valve counterclockwise four turns to
bleed remaining pressure from system.
Remove 2 bolts and lockwashers.
Lift motor and pump assembly from housing.
INOPERATIVE TRIM MOTOR
Slowly remove fill screw to bleed pressure from
reservoir.
From a full closed (clockwise) position, slowly turn
manual release valve counterclockwise four turns to
bleed remaining pressure from system.
Remove 2 bolts and lockwashers.
Using 2 screwdrivers, pry up on motor at slots.
18461
b
c

2. Remove screws and clamp.
Remove screws.
Lift motor from end cap, taking care not to drop
armature.
51345
a
b
c
de
a c
c
a - Screw (3)
b - Clamp
c - Screw (4)
d - Gasket
e - Grommet
3. Remove bolts.
NOTE: Some motors use 2 bolts to secure end frame
cap.
Lift end cap from pump.


again might be useless info as it refers to pics so please ignore if you dont find it of any help. I am sure someone will be along with a link to the manual anyhow

 

[Grant Brown]

Re: 70 Merc 3 cyl tilt/Trim motor removal - PICS

Thanks,

That helps. I think I'm on the right track but still wondering why it seems so tight to remove.

Anyone else have any input?

Grant

 

[TriadSteeler]

Re: 70 Merc 3 cyl tilt/Trim motor removal - PICS

The square motor housing is actually in two parts. The cap and the base. There are 4 long bolts in the top of the cap that you also need to remove. Then you will be able to remove the cap. There appear to be additional bolts in the base that is on the inside that will be exposed when the cap comes off. These pics should help.

 

[Grant Brown]

Re: 70 Merc 3 cyl tilt/Trim motor removal - PICS

Man that is AWESOME!
Thank you.

Grant in Vancouver

 

[Grant Brown]

Re: 70 Merc 3 cyl tilt/Trim motor removal - PICS

How do you get the pump (#50) out of the housing (#1)?
There is 3 3/8" bolts in the top of it. Can these be used to pry it out or is there some other way?

 

[mbrown67]

Re: 70 Merc 3 cyl tilt/Trim motor removal - PICS

Grant,

When you replaced the tilt motor did you have to remove the motor and transom bracket from the transom? Is there an easier way?

thanks,

Matt