• If this is your first visit to the iboats.com Boating Forums, be sure to check out the FAQ. To post a question or comment, begin by signing up. To start viewing messages, select the forum that you want to visit from the selection below.


Announcement

Announcement Module
Collapse

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 else’s 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 it’s posted at the end of someone else’s 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.
http://forums.iboats.com/forum-rules-guidelines-405/
See more
See less

1972 6 HP Johnson - What are the compression specs?

Page Title Module
Move Remove Collapse
X
Conversation Detail Module
Collapse
  • Filter
  • Time
  • Show
Clear All
new posts


  • 1972 6 HP Johnson - What are the compression specs?

    Folks, I'm looking at buying a 1972 Johnson 6 HP.

    I swear I've searched this forum and online, but I cannot for the life of me find somewhere that has the specs for compression.

    Can someone please tell me what the specs should be and if possible pls give an online source as I've had to ask this question before about another motor.

    Thanks.

    Grouse


  • #2
    Re: 1972 6 HP Johnson - What are the compression specs?

    Nor will you find one, they really didn't publish a "spec" sheet for compression numbers. I'd expect 80+ and close on both cylinders to be good, great would be 100+, 50 and lower may have some issues.
    sigpicSignature- If you have fuel and spark- Have you checked compression?

    Comment



    • #3
      Re: 1972 6 HP Johnson - What are the compression specs?

      Appreciate the reply, thanks.

      Grouse

      Comment



      • #4
        Re: 1972 6 HP Johnson - What are the compression specs?

        Originally posted by The Famous Grouse View Post
        Appreciate the reply, thanks.

        Grouse
        And they should be balanced....+/- 10% of each other....
        You do not need a parachute to skydive. You only need a parachute to skydive twice.

        I don't belong to an organized political party. I'm a Democrat. (Will Rogers)

        Comment


        Working...
        X