Evinrude motor

styles038

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Feb 23, 2007
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I was looking for a online schematic for evinrude motors, or any motors for that sake. Does anyone know anywhere. I can find schematics for anything but outboards. Thanks.
 

styles038

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Feb 23, 2007
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Re: Evinrude motor

I can't seem to get the powerhead out. I assume the two mounting bolts coming out of the case are the only ones. It just doesn't want to come out. I'm trying to replace the exhaust manifold gasket and can't get to the two or three lower bolts without removing the powerhead. Unless the case just splits but that doesn't want to come off either
 
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F_R

Supreme Mariner
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Jul 7, 2006
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28,195
Re: Evinrude motor

Don't quite follow you. Lets start at the beginning. What are yu working on, year, horsepower etc.
 

styles038

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Re: Evinrude motor

I got a 1972 evinrude 9.5hp. The head gasket was shot so i threw a new one in without any issues. The fuel pump was MIA so i bought i new one and installed it. Cleaned the carb and tore the lower unit off and everything looked great. After i put lower unit in it i started her up and she would only run on full choke. I got looking around and water was "shooting" out of the exhaust manifold. So i'm in the process of tearing that off and i can't get to the two lower bolts without ripping that side of the case off or the powerhead out completely. Unlike EVERY other motor i have worked on the case looks to split and come off one side at a time. That's fine, i didn't think i would have any problem with that. WRONG. The case doesn't want to come out and i have removed every screw and bolt i can locate. What is the easiest way to do this. I hate to ask because it seems so self explanitory but everything i'm tring just isn't working. Any ideas?
 

F_R

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Re: Evinrude motor

Hey, don't hate to ask. You have picked one of the most challenging jobs out there for somebody not familiar with that motor. You are right, the whole motor has to be shucked out of that split clamshell. There are many things to undo before you can get it out, and some hidden screws. I haven't got time right now to go over it, but if you can wait till tomorrow, I will try to give you some guidance.
 

styles038

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Feb 23, 2007
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Re: Evinrude motor

I appreciate the help when you or anyone has time. I have rebuild/repaired many small outboards but not one has been as difficult as this 9.5. Thanks.
 

iwombat

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Re: Evinrude motor

It's gotta look like this right before you slide the powerhead and exhaust out as a unit.

newPowerhead.jpg
 

samo_ott

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Jun 18, 2006
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5,125
Re: Evinrude motor

Wow... I was thinking of getting one of those 9.5's as I dont have one...But do they ever look different compared to my 10's! Is that the carb up top? Yeesh!
 

F_R

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28,195
Re: Evinrude motor

Heck, the carb is the easy part....
But here ya go, here's the instructions that I wrote for somebody else but had enough sense to save them.

It’s been at least 10 years since I’ve torn one of these motors down so most of this comes from memory and I may miss a point or two…. But when I was a mechanic for an Evinrude dealer in the ‘60s I could almost do it in the dark. At the time, I maintained a fish camp full of them and was constantly replacing the rubber motor mounts.

Look at the speed control linkage. You will see a flat link held on by a couple of e-clips. Remove this link. Remove the pivot bolt and wave washer where the throttle linkage comes from the steering handle, and the flat washer underneath it. By moving the linkage aside, you can disconnect the arm going to the magneto. Look at the inner end of the gearshift lever shaft. You will see a hex head screw with a pin, holding the shift shaft to the linkage. Remove the pin / screw. DON’T attempt to shift it with the screw removed…you’ll likely break the slotted part that it goes through. Pull the shift lever & shaft straight out far enough to disengage it from the inner lever.

Remove the choke rod at the carburetor and slide it out of the front panel (catch the flat spring underneath the choke knob). Remove the coil spring that holds the slow speed cable in an arc. Pull the slow speed knob off. Looking on the inside of the panel, you’ll see an e-clip on the slow speed cable. Slide it off. Then the slow speed needle/cable can move outward and you can remove the c-ring and slide the cable toward the inside and out of the panel. Remove the starter handle and tie a slip knot in the rope (inside the housing) to prevent it from unwinding. Unplug the stop button wires, remove the push nut holding the wires to the cover. Remove the plastic panel if it’s a one piece. The stop button will come off with the panel. The two-piece ones do not have to be removed. Remove the fuel hose that goes from the connector to the fuel pump.

Pop the exhaust relief hose out of the lower cover. Loosen the screws holding the vibration damper to the exhaust manifold. Slide the vibration dampers off the screws in the exhaust manifold (holes are slotted). Remove the screws holding the other vibration damper to the carburetor.

There is a semi-circular, slotted, steering friction plate (co-pilot) under the front portion of the lower motor covers, held on by 2 screws. With the motor steered straight ahead you can remove the friction adjusting screw, which goes down through the slot in this part, along with the friction washers. Then remove the semi-circular plate. Remove the two screws holding the upper front rubber motor mount to the lower motor covers. Similarly, remove the two screws holding the lower motor mount to the lower motor covers.

Remove all the screws holding the starboard and port side lower motor covers together. There are several Phillips and a few hex screws holding them. Some are up underneath where you have to look for them, but are obvious once you find them. It’ll be practically falling apart once you get them all out. Don’t force or pry anything, if it doesn’t come apart, look for another screw.

Remove the acorn nut from the side of the starboard lower motor cover, about 1/2 way down. The starboard cover should now lift off. Remove the acorn nut from the port lower motor cover, and the powerhead / exhaust housing / lower unit should lift out in one piece….That is if we got everything disconnected. Be sure to catch all the loose rubber bumpers and stuff that will fall out and roll across the floor.

Simple, huh?

Feel free to inquire about anything I missed. Frank
 

iwombat

Captain
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Jul 12, 2006
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3,767
Re: Evinrude motor

All-in-all it's not so bad. It's just a long unbottoning procedure. There's no $90 special wankenstien sklorbomatic wrench involved. Nothing that you pull on real hard until it flies off an hits you in the forehead so hard you dance around screaming "ohmygod ohmygod ohmygod" just before you black out and hit the floor. Nothing like that. Take your time, take some pictures, and keep the pieces you pull off well organized. It's just lengthy, but not hard.
 
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