Welcome Guest - Sign Up today
Welcome Guest - Sign Up today
Store Links Mobile - Shop Now



Help Tip: If you have a question that has not been answered to your satisfaction in the archives, it is always best to start a new thread of your own. By starting your own thread, you will receive the maximum number of views by forum members.

Below are some additional forum policies in hopes of all iboats members will follow, Thank you.

1. Please do not reply to old topics or hijack existing topics. Old topics of a technical nature are like a library book, Please do not write in them.

2. Old topics should be considered archives and used for reference only. Please do not reply to them.

3. Do not take over someone elseís topic (aka hijack) with your own question, even if it is similar. If you have a question that has not been covered to your satisfaction in the archives, it is always best to start a new topic of your own.

4. If you have a question for the original poster (OP) and the topic is over 30 days old, send the OP a PM, he may not even visit the forums any longer, or may not notice your question in the old topic.

5. By starting your own topic, you will receive the maximum number of views by forum helpers that may not even notice your question when itís posted at the end of someone elseís topic. And those answers will be specific to your particular issue.

6. Please do not post to topics that have been inactive for more than 3 months unless you are the original poster. We have very active forums and any topic that remains inactive for that long should be considered "dead". It is especially confusing when there is an entirely new question posted to an old topic.

7. Posting at the end of any topic is considered to be hijacking the original posters topic which in turn subjects the topic to be closed if it continues to happen thus not making it fair to the original poster in the future had for some reason he/she needed to return for additional information or provide an update of the problem solved which is always welcomed within a reasonable amount of time frame.

8. Please note that you should see a red banner pop up near the bottom of each inactive topic asking you not to reply to old topics. The Red banner will read: Please note this topic has been inactive for 90 days. For the best results, please start a new topic.

Thank you all in advance for doing your part in helping iboats run a smooth ship.

Additional forum rules linked below.
See more
See less

1977 Johnson 25 hp 25r77s Mix & ?

  • Filter
  • Time
  • Show
Clear All
new posts

  • 1977 Johnson 25 hp 25r77s Mix & ?

    I just bought a 16' lake jon at a state auction last week and out of the blue yesterday I get a call from a friend I haven't talked to in months saying she knew someone that had a 1997 25 horse johnson for $600. I flew over there as fast as I could drive. It ended up being a 1977 25 and I talked her down to $150. I am sure I could have got it for $100 but I didn't go any lower. She needed the money and she seemed nice. She didn't know or care about boats, she got it in a divorce or something. I got a bill of sale.Anyway, what would the mix be? Any things I should do before I try to start it? She said it has sat 2 years (Laying down on it's side). Looks pretty clean but that doesn't mean much. Is it a long shaft or short? Compression? Important specs?Sorry for all the stupid newbie questions. This is my first boat motor that wasn't some small ancient turd. I have tools and mechanic skills just never have worked on outboards before. First thing I plan on doing is buying a clymer book on it. But till then I will have many questions I am sure.

  • #2
    Re: 1977 Johnson 25 hp 25r77s Mix & ?

    Since you say you're mechanically inclined, I would recommend that you pull the lower unit and replace the water pump before you even start it. They deteriorate with age whether they are used or not. You would have to do it soon anyway, and if you do it now you won't have to worry about it.The mix is 50:1.After the water pump you should squirt some pre-mix in the spark plug holes to lubricate the cylinder (will help it start also). You may find even if it runs that it may need a carburetor rebuild since 2 years of inactivity may have gummed up the carburetor. Once its running do a compression test with the engine warmed up, plugs out, at full throttle. Cylinder should be within 10-15 psi of each other. Then you can go boating knowing you did in fact get a real deal.


    • #3
      Re: 1977 Johnson 25 hp 25r77s Mix & ?

      That is exactly the advice I was looking for!! Thank you! I am going to do that. I am going to call the local johnson dealer and see what I can get a new water pump for and probably a carb rebuild kit for safe measure. I expect to do some work on it at that price but I am hoping for the best. We will see.Thanks again.Ric


      • #4
        Sign up today
        Re: 1977 Johnson 25 hp 25r77s Mix & ?

        I think you got a deal. The propeller alone is probably worth $75.