1964 Johnson 9 1/2 help!!!!!!!

[hoytvectrix]

I recently picked up an 1964 Johnson 9 1/2 Sea Horse outboard that has been sitting around in a shed for a while. I replaced the fuel pump and then went out on a lake. It fired right up, but idled very high when it was choked, I took it out of choke and it died. It ran again, this time I got it in gear and it moved around. It doesn't have all the power that it should, and it only runs when the motor is choked, even when I have it on full throttle, if I take the choke off, it sputters and dies. I think it has carburetor issues, but not for sure, could use a little help.....

 

[Rick.]

Re: 1964 Johnson 9 1/2 help!!!!!!!

Yes, it sure sounds like it's time for a good cleaning and a carb. kit. Have a look at the Top Secret File at the top of this forum. There are good pointers there about getting a motor back in running condition after a long period of storage. Some recent threads about 9.5 poor idling and some one specifically mentioned the 64 and 65 were never too good at idling. Still if your having to run with the choke on that is telling me your short on gas and that will likely mean the carb. is dirty. Best of luck. Rick.

 

[hoytvectrix]

Re: 1964 Johnson 9 1/2 help!!!!!!!

Thanks alot. I will clean the carb. I believe that 50:1 is the correct fuel mixture for this motor, could you please verify that for me.

 

[rolmops]

Re: 1964 Johnson 9 1/2 help!!!!!!!

50:1 is the correct mix.My 1964 9.5 idles just nice.Before you rip into the carb,you may want to dump a can of carburetor cleaner in your tank and run it for a while with the choke pulled a bit.Then as it starts to sputter close the choke a bit.Continue this gradual process until you can run it without using the choke.The idea is that you will remove the varnish in the carburetor,just by running it with a little help
My personal favorite carb cleaner is "Seafoam"

 

[hoytvectrix]

Re: 1964 Johnson 9 1/2 help!!!!!!!

I get your idea. How many gallons of fuel should I mix with that can of carburetor cleaner before I run it again? I also have another problem. I broke the pull cord to start the engine, and I can't get it to work again after I replaced the rope. I put it back on, spooled it up with the new cord using a screwdriver, pulled and released the cord after I pulled and it didn't re-spool itself. What should I do to get it to spool up on its own???????

 

[ezeke]

Re: 1964 Johnson 9 1/2 help!!!!!!!

You asked ".......I broke the pull cord to start the engine, and I can't get it to work again after I replaced the rope. I put it back on, spooled it up with the new cord using a screwdriver, pulled and released the cord after I pulled and it didn't re-spool itself. What should I do to get it to spool up on its own???????"

You have to rewind the spring:

Pull the starter rope out until the knot is facing you and tie the handle end of the rope to the tiller handle to keep it from retracting.

Remove the roll pin from the pinion.

Using a large wide screwdriver, tighten the spring 18 360 degree turns counterclockwise and replace the roll pin.

Untie the rope from the tiller handle.

 

[Rick.]

Re: 1964 Johnson 9 1/2 help!!!!!!!

Well, that is not the way to clean a carb. but your welcome to try it if you like. Rick.

 

[Lion hunter]

Re: 1964 Johnson 9 1/2 help!!!!!!!

It's a 20 minute job to take that carb, off clean it and put it back together. I would suggest a carb kit as well. There cheap and easy to install. You don't want to get it all back together and find out the float is bad, gaskets are dried out, ect.

 

[Nobody]

Re: 1964 Johnson 9 1/2 help!!!!!!!

You may also want to consider replacing the fuel lines as they may have (or may in the future) have issues with the newer gasoline formulation and cause more carburetor issues.

 

[F_R]

Re: 1964 Johnson 9 1/2 help!!!!!!!

You asked ".......I broke the pull cord to start the engine, and I can't get it to work again after I replaced the rope. I put it back on, spooled it up with the new cord using a screwdriver, pulled and released the cord after I pulled and it didn't re-spool itself. What should I do to get it to spool up on its own???????"

You have to rewind the spring:

Pull the starter rope out until the knot is facing you and tie the handle end of the rope to the tiller handle to keep it from retracting.

Remove the roll pin from the pinion.

Using a large wide screwdriver, tighten the spring 18 360 degree turns counterclockwise and replace the roll pin.

Untie the rope from the tiller handle.

Well that certainly is a different way to do it, but here is the better-known way:

Pull the rope all the way out

Stick the handles of a pair of pliers under the pinion--that will lock the pinion to the flywheel and prevent rewinding.

Remove the handle from the rope. Then grab the knot and pull the rope out of the spool. (Some don't have a knot, but a complex way of locking the rope in--study it before removing)

Hang onto the spool and remove the pliers. Allow the spool to rewind slowly

Now use the large screwdriver to wind the spring counterclockwise, then stick the pliers back in.

Reinstall the rope. Then remove pliers and allow to rewind

All this is in vain if the spring is broken or damaged from the backlash when the rope broke. In that case you will have to first replace the spring.

 

[ezeke]

Re: 1964 Johnson 9 1/2 help!!!!!!!

Well that certainly is a different way to do it, but here is the better-known way:

Pull the rope all the way out

Stick the handles of a pair of pliers under the pinion--that will lock the pinion to the flywheel and prevent rewinding.

Remove the handle from the rope. Then grab the knot and pull the rope out of the spool. (Some don't have a knot, but a complex way of locking the rope in--study it before removing)

Hang onto the spool and remove the pliers. Allow the spool to rewind slowly

Now use the large screwdriver to wind the spring counterclockwise, then stick the pliers back in.

Reinstall the rope. Then remove pliers and allow to rewind

All this is in vain if the spring is broken or damaged from the backlash when the rope broke. In that case you will have to first replace the spring.

And that works fine (if you replaced the rope before it broke) except that you already broke the rope and the spring is already unwound.

 

[hoytvectrix]

Re: 1964 Johnson 9 1/2 help!!!!!!!

Thanks for all your help. But of course I ran upon another problem. I drained the lower unit gear case and the oil that came out was very milky, I know reason for that is water leaking into the lower unit. I was wondering what the best way is to find the leak.

 

[Lion hunter]

Re: 1964 Johnson 9 1/2 help!!!!!!!

The water leak is alot of times bad plug gaskets. Get new gaskets. Lower unit oil has emulsifiers as well that bind water so it doesn't damage the gears. Even the slightest water can turn it milky. After draining you can run mineral spirits through to clear the water. Let drain completly, refill and give it a try.

 

[hoytvectrix]

Re: 1964 Johnson 9 1/2 help!!!!!!!

What do you mean by plug gaskets? I looked at the exploded view of the lower unit on the internet and I didn't see anything that said plug gaskets. I am a little confused.

 

[billy4hp]

Re: 1964 Johnson 9 1/2 help!!!!!!!

What do you mean by plug gaskets? I looked at the exploded view of the lower unit on the internet and I didn't see anything that said plug gaskets. I am a little confused.

The plug gaskets are the sealing washers that are behind the fill height and drain screws. Most people replace them every time they remove either plug to check the condition of the lower end lube....

 

[hoytvectrix]

Re: 1964 Johnson 9 1/2 help!!!!!!!

thanks for all your help everybody, but i think I ran into another problem. I was running on the river the other day, and everything ran fine, until it felt like the motor wasn't grabbing in the water, it sounded like it was skipping, not the engine. It would go like a champ, but then it seemed like the propeller would pause, and them go again. When the propeller paused or whatever, the engine revved up and then it grabbed and went again. It cut my speed from earlier in the day at 16 mph to around 12 mph. I'm thinking lower unit issues, but not for sure.

 

[bktheking]

Re: 1964 Johnson 9 1/2 help!!!!!!!

Clutch dogs wore out???

 

[crxess]

Re: 1964 Johnson 9 1/2 help!!!!!!!

Check the prop. Could be a damaged shear pin or loose prop.

 

[kbait]

Re: 1964 Johnson 9 1/2 help!!!!!!!

If it's not 'clunking' when it looses speed, it's likely a spun prop hub. It's rubber that is between the aluminum prop itself and the metal center. If it's like you 'pushed in the clutch' while running and it rev's up, and then grabs again when you throttle down, that's likely the cause. Good luck!

 

[Lion hunter]

Re: 1964 Johnson 9 1/2 help!!!!!!!

No rubber hub on this. Shear pin is behind the prop.