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  1. S

    1979 115 hp bad clunk

    My motor has developed a bad clunk on acceleration. It happens at about 2300 rpm and only if I accelerate somewhat hard. It is one clunk bad enough to have the boat shake. I am guessing that it is lower end related but am not sure. Any comments would be helpful. Thanks Sherm
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    will a 74 exchange with a 79 115hp

    What is the difference between these two and will a 74 even fit on a 79 mid section. Thanks Sherm
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    Air coming out of carb?

    I have a 1996 Johnson kicker that I was doing a decarb on yesterday. There is a little plastic plug that I remove in the air box that I spray the Deep Creep through. Question I noticed that air is being pumped out of this hole. Not a lot. Is this normal or do you think I have a leaking reed...
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    starter rebuild problem

    I am rebuilding a Prestolite MGL-4109 starter off of a 1979 115hp. Two of the four brushes were attached directly to the field windings with a spot weld rather than solder. There was a metal sleeve around these old wires that is crimped to the end of the brush wire and then spot welded to the...
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    O ring installation shift rod 79 115hp

    After a couple of hours trying to install the o ring into the shift rod housing I decided I must be doing something wrong. The only instruction in the factory service manual is a picture with the o ring squeezed together and being stuffed into the hole for the shift rod from the underside of...
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    1979 115 hp jumps when trying to put in reverse

    I tried to adjust the cable but the cable end is back all the way to the block but it clunks badly when shifting into reverse. I took the lower unit completly apart today to give it a good visual. The reverse dogs are a little rough but no worse than the forward ones. On my old merc. I had...
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    1979 115 hp no spark on three of four cylinders

    After running about four miles out and trolling for about 45 min. the engine died like someone shot it in the brain. Would not restart so after several attempts I started my kicker and trolled for about an hour. Then I tried to restart the 115 and it started right up. But it only ran for...
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    water leak 1979 115hp

    I have a small stream of water coming out in the space between the bottom of the rear exhaust housing and the top of the housing for the thermostats. I can't tell which of these may have the problem. Should I start with the exhaust housing just because it is easier to get off or is it more...
  9. S

    No oil for 15 min. now what

    1979 115hp evinrude. While decarbing I left out the oil when I ran 3/4 of a gal of gas with a can sea foam for about 15 min. through the engine. I just realized it a week later (old age). I ran the rest of the day with no aparent problems. Do you think I now am running a ticking time bomb.
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    Etec weight vs old evinrude

    I am considering repowering my 17' whaler with a 90 hp etec. I have been running for years with a 1979 115 evinrude. To my surprise the Etec 90 is listed at 320# with 20" shaft. But my service manual for my old motor list the weight at 301#. Why is the three cylinder etec 19#s heavier than my...
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    1979 115hp crank shaft repair

    As a winter project I am planning to go through this motor. The one thing I already know is that one of the rod journals on the crankshaft has a flake off it about the size of top of a pencil eracer. When I put this motor back together 10 years ago I really didn't think it would run this long...
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    1979 115hp clatter

    My engine has developed a clatter between 1100 and 1500 rpm. It sounds like something loose in the rods or piston it seems to shake a great deal in the same rpm range. It runs great at idle and high speeds. Any ideas.
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    79 115hp hot wiring not fun

    The starter solenoid will not pull in using the ignition switch but works fine with a jumper from the positive side big post. I replaced the ignition switch but that didn't help. I have 12v at the solenoid with the key in the start position but apparently not enough amps. I cleaned all the...
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    1996 6hp runs on with 3/4 choke

    I have replaced the following and it will only run or start with the choke out 3/4 and it runs poorly even then and often dies. This is a kicker motor and runs on the same gas supply through a filter seperator and the big motor runs great. With much help from you guys.<br />Compression is 90...
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    90psi compression too low?

    1996 johnson 6hp both cylinders are about the same. My 115hp has 128psi on same gauge. I have this thing almost totally apart and wonder if I should replace the rings while I am in there.<br />Any insite would be very helpful. Thanks.
  16. S

    1996 Johnson 6hp won't idle

    Seem to run fine at high rpm. Will not idle at all. I have cleaned the carbs and installed new kit, changed plugs and checked spark (jumps 7/16 no problem). Pumping the primer bulb does not help. I have to choke it every time even when hot to get it to start. The compression seems low at 89 &...
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    sudden stop hard cranking

    1979 evinrude 115hp. Six miles off coast trolling at idle it stopped abrubtly, like it froze up. When I tried to restart it cranked very hard but started and ran fine for another 30 min. then stopped abrubtly again and again it cranked slowly and hard but started again and ran fine the rest of...
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    1979 115hp bottom cylinder cuts out

    I have intermittent problem with #2 cylinder not working. The bottom cylinder plug is completly black and the other three look really good. I have been fighting an ignition problem but now I have good spark 7/16 jump test on all cylinders. The compression is 120,120,118, 118. I put on a...
  19. S

    1979 115hp bottom cylinder cuts out

    I have intermittent problem with #2 cylinder not working. The bottom cylinder plug is completly black and the other three look really good. I have been fighting an ignition problem but now I have good spark 7/16 jump test on all cylinders. The compression is 120,120,118, 118. I put on a...
  20. S

    1979 115hp evinrude no spark on starboard cylinders

    I have been having a running battle with this engine for some time. It would not run on one cylinder. I just gave up and took it to the shop. He could find nothing wrong but said that the starboard head was running 30 degrees cooler than the port head. He said it might be a power pack so i...
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