1971 Johnson 9.5 HP Problems

[ussneverfloat71]

Motor seems to run okay in barrel. But when on the lake, ran for about 2 minutes in forward. Then started having serious trouble.
1. Seemed like running out of fuel.
2. Restarted but runs in full choke only.
3. Surges then shuts off. Will start again immediately. But then same trouble.
4. Also will not go into reverse.

Any help or ideas on the problems would be greatly appreciated.

 

[Bob_VT]

Re: 1971 Johnson 9.5 HP Problems

Welcome to iboats.

Is this a new to you motor? Do you know any of it's history?

First I would say your carb needs to be cleaned.

As far as not going into reverse...... has the impellar been changed? ........ the linkage is out of adjustment.

 

[ussneverfloat71]

Re: 1971 Johnson 9.5 HP Problems

Yes, this is a new motor to me purchased recently. I dont really know what the history is, fella said that he had this same trouble and also said that it ran fine all last year. Unknown if the fella I purchased it off of ever did anything with the impeller. He also didnt mention anything about it not going into reverse when I was talking to him about the motor before purchase. But got a dandy price on it so I picked it up. Have purchase 2 other motors in the past one of them was too large for my boat and the other a piece of junk. Really thought that I had come across a great deal with this one. Hope so, I will try cleaning the carb and see what happens from there.

1. Where is the best place to get parts and a manual for this motor?

Thanks!!

 

[Rick.]

Re: 1971 Johnson 9.5 HP Problems

I usually get parts off Ebay or an OMC dealer. You should be able to find an original OMC service manual for your specific model #. The shifting could be caused your shift linkage being out of whack. Here is a link to a complete parts breakdown of your motor. Best of luck. Rick.

 

[Bob_VT]

Re: 1971 Johnson 9.5 HP Problems

Well about a day of TLC would probably help that motor.

First I would order an impellar (very cheap )

I would check the compression and see where it is at. Those smaller motors do excellent to de-carb procedures and it will probably raise your compression too!

When you are in the lower unit doing the impellar you will have to dis-connect the shift rod linkage ........ I bet someone may have done that wrong in the past and that could also be part of your reverse problem

 

[ussneverfloat71]

Re: 1971 Johnson 9.5 HP Problems

thanks guys i will do the work. i need to wait for my manual first though. the wife and i are really looking forward to getting this motor out on the lake. we have decided (somewhat) on the seloc manual, i dont know if it makes much difference. what do you think?

thanks a bunch :jim

 

[Cap'n Chaos]

Re: 1971 Johnson 9.5 HP Problems

I went the same route... and then I bought the manual for my motor.

 

[cajuncook1]

Re: 1971 Johnson 9.5 HP Problems

thanks guys i will do the work. i need to wait for my manual first though. the wife and i are really looking forward to getting this motor out on the lake. we have decided (somewhat) on the seloc manual, i dont know if it makes much difference. what do you think?

thanks a bunch :jim

This should help some until you get your manual.

fuel to oil ratio is 50:1

16 oz of 2cycle TWC-oil to 6 gallons of 87oct gas

8 oz of 2cycle TWC-oil to 3 gallons of 87oct gas

Nice motor when they are maintained and no exhaust leaks. I have 2 of those motors.

Just a suggestion, to do the final slow idle adjustment make sure your at the lake. If you must adjust it in a barrel, get a fan to blow the exhaust away from the motor and barrel. The motor sits low, so it inhale its own exhaust and makes it difficult to adjust the idle in a barrel.


Public link with a list of condense manuals (free)

Go to: http://search.ebscohost.com/ <-- (click on this link)

Log in with:

Name: marshall

P.W. : public

click the square box labeled login

-----Go under the Small Engine Repair Reference Center

-----Then select Marine/Boat motors

Scroll through the list of makers/manufacturers

-----Select Johnson/ Evinrude

----- 9 1/2 hp Johnson/Evinrude manual(1964 to 1968) down near the bottom of the page (not much change in the motor from this time period and your motor . (down near the bottom of the page)

or

----- OUTBOARD 2-40 HP, 1973-1990 (INCLUDES ELECTRIC MOTORS) 1973 was the last year 9.5hp motor where manufactured but it 99.8% the same as your motor.

Hope this helps!

cajuncook1

 

[Daviet]

Re: 1971 Johnson 9.5 HP Problems

You will be money ahead to by the OEM manual, costs a little more, but well worth it.

 

[seamorewaterVIP]

Re: 1971 Johnson 9.5 HP Problems

I just rebuilt the lower unit on my six and when i got it all put togather it would not go into reverse took it apart again and sure enought the little brass thing that connects the upper shift rod to the lower shift rod was hitting impeller housing moved it to the orrect position and whala worked like a charm.

as for running
1 impeller, 2 decarb 3 comp check both holes should be close to the same 4 new plugs 4 clean carb.



go have fun.

 

[ussneverfloat71]

Re: 1971 Johnson 9.5 HP Problems

What is decarb? I feel kinda dumb asking but I have heard this term twice and dont have a clue. Also seems like there is a linkage loose that has a hole in it for attachment in the area of gear shifter inside the engine compartment. Seems as though there is a peg it goes on that swivels. I didnt attach it yet. Does that sound correct to anyone? If so, what does it do?
Thanks again:jim

 

[seamorewaterVIP]

Re: 1971 Johnson 9.5 HP Problems

What is decarb?

Look for seafoam or mercury power clean in a spray can at you marine dealer start the engine in a barrel and follow directions on can. fyi it will smoke like crazy but that is what is normal.

 

[Rick.]

Re: 1971 Johnson 9.5 HP Problems

You should have a look at the "Top Secret File" at the top of this forum. Lots of good information for you there including how to decarb. Rick.

 

[ussneverfloat71]

Re: 1971 Johnson 9.5 HP Problems

Rick I looked everywhere I can think of for this "Top Secret File", I dont see anything labled as such.

 

[Rick.]

Re: 1971 Johnson 9.5 HP Problems

http://forums.iboats.com/showthread.php?t=299680
It is the first post (sticky) in the Johnson/Evinrude outboard forum. The forum we are in right now. You'll be wondering how you missed it when you spot it. Rick.

 

[ussneverfloat71]

Re: 1971 Johnson 9.5 HP Problems

Here is what I found out so far, on the 9R71R 9.5 hp Johnson I should have champion j4j plugs or else a c ac-m42k. When I took a look the plugs appear to be relatively new,but they are L77 j4. I went to my local auto parts dealer and bought 2 Marine j4j.I also picked up some Carb. dip. I believe I can remove the carb without having the manual. A few linkages and 1 spring and 5 screws is all it looks to take. Gonna go forward with this action then wait till my manual gets in for further maintenance. I also found the sticky file, but it shows to be locked, so was unable to view.

 

[cajuncook1]

Re: 1971 Johnson 9.5 HP Problems

Dude, I supplied a link with a condense free manual with my above post. Look up at my entry above..... it will help you out until your manual arrives.

cajuncook1

 

[Rick.]

Re: 1971 Johnson 9.5 HP Problems

try that sticky again. I've never known them to be locked. Rick.

 

[ussneverfloat71]

Re: 1971 Johnson 9.5 HP Problems

I figured out what I was doing wrong with the sticky file, I see what you mean, GOOD INFO. I especially appreciated the how to adjust my carb part.At least that is what I will use first anyway. I also enlisted my first mate to help with the condensed manual that cajuncook1 sugested. I am no better with computers than I am with my new motor. I will read up on it tonight and go forward with more maint. Thanks.Jim.

 

[Bob_VT]

Re: 1971 Johnson 9.5 HP Problems

Here is what I found out so far, on the 9R71R 9.5 hp Johnson I should have champion j4j plugs or else a c ac-m42k. When I took a look the plugs appear to be relatively new,but they are L77 j4. I went to my local auto parts dealer and bought 2 Marine j4j.I also picked up some Carb. dip. I believe I can remove the carb without having the manual. A few linkages and 1 spring and 5 screws is all it looks to take. Gonna go forward with this action then wait till my manual gets in for further maintenance. I also found the sticky file, but it shows to be locked, so was unable to view.

You know NOT to run that stuff through the motor

Yup while waiting for the manual post your Q's and we will try to help. You should be able to LOOK at any "locked" post but not add to it.