1975 Johnson 135 questions

[MinnStarcraft]

Re: 1975 Johnson 135 questions

It's actually a fairly simple system-I'd check the motor out first, then the solenoid and switch. The original factory manual has a page and a half about troubleshooting the electrical system on this unit-with a simple household voltmeter. (Unlike later models, there is no fuse put in the system from the factory.) You can get an original factory service manual from this website: outboardbooks.com The factory left an stubbed off gray wire inside the control box. That wire is the signal wire to drive the tach. You will need to pull the box apart to locate that wire. The wire fits inside a hole at the bottom of the two halves of the control box. It will drive any marine type tach.

X2 on getting the service manual.
There are several on eflay hey bay right now. Most, if not all, of your questions will be answered within that book. Get the parts manual while you are at it. They are both muchly helpful.

 

[younggun]

Re: 1975 Johnson 135 questions

I will be sure to order the manuals. The number I found was 135383m but I also noticed that the motor is mounted on a 70 hp part that that mounts to the boat(sorry not sure what actual term is).

 

[emdsapmgr]

Re: 1975 Johnson 135 questions

Are you trying to say that the 135 engine is mounted atop a 70 hp transom bracket? Maybe you should post a couple of pictures of this engine you are working on.

 

[younggun]

Re: 1975 Johnson 135 questions

I just know the serial number plate when I cleaned it off it said 70hp at 5000 rpm so I figured it was from a 70 hp

 

[racerone]

Re: 1975 Johnson 135 questions

It appears that the transom bracket is the same for a 135 HP and a 70 HP.----So it is possible that was swapped out and they did not swap out the wee model # plate.-------Without correct identification / model # / pictures it does become very confusing to those who try the help.----To the original poster it might appear that " nobody knows anything " -----------So post some pictures of what you have !!!----I do not believe we know for sure whether you have a power trim system or just power tilt.-----I see these all the time where folks say their motor has trim and tilt , just because they see a motor and reservoir for oil.----Facts need to clearly presented.

 

[younggun]

Re: 1975 Johnson 135 questions

I appreciate all the help I am getting and all of it seems very helpful. I will post some pictures later when I get a chance. I am not around the boat right now so I can't get any at the moment. The motor has a cylinder on each side of the motor. I found the casting plug with the serial number and model number on it on top of the block and the numbers were 135383m and j0004301

 

[V153]

Re: 1975 Johnson 135 questions

135383 is the model# for a '73 135 Evinrude. Hmm

 

[younggun]

Re: 1975 Johnson 135 questions

Ill have to check with the previous owner on that. I'm at the lake right now and it won't hardly go above idle speed. It seems like a fuel issue because it will surge every now and then.

 

[emdsapmgr]

Re: 1975 Johnson 135 questions

While the transom brackets may be the same, the exhaust adapters certainly are not. So, just the transom bracket was swapped, complete with the 70 hp serial plate. So, the real question is just what year is the powerhead? How do you know it's a 75 and how do you know it's a 135. It's also easy to swap cowlings with different hp decals. Pictures are the definitive proof. Post some if you can.

 

[younggun]

Re: 1975 Johnson 135 questions

I found the plug on top of the cylinder and it was under some electronics that I hd to unbolt and i couldn't get a good picture but the numbers were j0004301 and 135383m which makes it a 73(as stated above by another poster). But I believe my performance issue today was the fuel pump diaphragm( I think that's what it's called) is cracked and broke in 2 spots. Would this cause it not Togo much above idle? It surged and try to take off when I had my friend pump the bulb

 

[emdsapmgr]

Re: 1975 Johnson 135 questions

Original fuel pumps were not made with rubber bladders which could run fuel with ethanol. It will eat up the rubber bladders inside. Bombardier does not make a fuel pump repair kit for that model. You'll have to get a whole new pump. Original part number: 385784 supercedes to 438559. Probably a good normal maintenance item for that engine anyway....

 

[younggun]

Re: 1975 Johnson 135 questions

Sorry it took me so long to update. The boat has not been at my house but I brought it home today. I took the breather cover off and it looks like the chokes are staying shut and not reopening. I can see the little actuator twitch when I push the key in but the choke is already engaged so it doesn't do anything. I can open them by hand but they all right back closed. What do I need to do to make them function properly?

 

[V153]

Re: 1975 Johnson 135 questions

Please post pics ...?

 

[racerone]

Re: 1975 Johnson 135 questions

Choke can be pulled on manually !---- Find the lever / knob / mechanism for this----perhaps someone has messed it all up ?

 

[younggun]

Re: 1975 Johnson 135 questions

I'll get some pictures tomorrow and post them

 

[boobie]

Re: 1975 Johnson 135 questions

Sounds like your chokes have been turned on manually.

 

[emdsapmgr]

Re: 1975 Johnson 135 questions

Another possibility. These early models were not designed to specifically locate the mechanical solenoid in an exact position. It was done by manual positioning. If the solenoid is not mounted in the correct position under the clamp band, the travel of the piston is not correct when activated and it won't function properly.

 

[younggun]

Re: 1975 Johnson 135 questions

This is the pictures after I push the key it closes and stays like that in the first picture then I bump it with my finger and it goes like it is in the other picture.

 

[younggun]

Re: 1975 Johnson 135 questions

More pictures of the motors and both sides of the carbs and the choke solenoid

 

[racerone]

Re: 1975 Johnson 135 questions

Picture number 4 shows the fuel pump and the manual choke linkage.---------These motors when cold ( key in on position ) will activate the choke 1/2 way when cold.----Then you operate the switch for full choke for start-up.----Choke stays on halfway for warm-up and then goes off all the way.---At least that is how it came out when new.-No telling how it is wired up now !!