• 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

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 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.
http://forums.iboats.com/forum-rules-guidelines-405/
See more
See less

2 cycle oil vs 30 weight

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts


  • 2 cycle oil vs 30 weight

    Please help I'm new to the older model outboards. I have always used a 4 stroke but I just received from my wife grandfathers estate a 1954 QD-15 10 hp Johnson. I was able to tune it up and get it running, however I am wanting to know what fuel mix ratio should be used and if I should stay with the 2 cycle or use the 30 weight? Both are shown to be acceptable on the engine cover decal. What is best? and what mix ratio?

    Thank You

    nomyar


  • #2
    Re: 2 cycle oil vs 30 weight

    According to http://www.evinrude.com/en-US/About....il.Fuel.htm#Q1 the correct mixture is 20:1

    Use a 2 stroke outboard engine oil. (TCW2 or TCW3 spec) It'll smoke more heavily on ordinary SAE 30 and the oils you get today as SAE 30 will be stuffed full of unsuitable additives most probably.

    Comment



    • #3
      Re: 2 cycle oil vs 30 weight

      agree ^^^^
      FLORIDA GATORS
      TEBOW Country



      Please, NO PM's (Private Messages) regarding boat/engine problems. they will not be answered.
      That is what these forums are for. Post your questions, in the appropriate Forum.

      Comment



      • #4
        Re: 2 cycle oil vs 30 weight

        I always found in my 2 stroke motorcycle days that you had to give the tank a shake before each trip to re-mix the fuel with SAE-30
        TCW-3 once mixed will stay mixed.
        sigpicMarada 2100 Executive Series, 5 Litre V8 with Mercruiser Alpha 1 outdrive. 2007 K-Z Spree 260 RBH, all = a whole lot of family fun !!!!

        Comment



        • #5
          Re: 2 cycle oil vs 30 weight

          The issue with SAE30 is that it is a conventional motor oil. Two stroke oils are designed to "burn" more completely and are made specifically for two-stroke engines. There is also a difference between "two-stroke" oil and "TCW3" branded two stroke oil. TCW3 is for use in "water cooled" two strokes. Conventional two-stroke oil is designed for use in "air cooled" engines. So DO NOT use LawnBoy or other chain saw/weed whip oils in your water cooled outboard.

          Comment



          • #6
            Sign up today
            Re: 2 cycle oil vs 30 weight

            Originally posted by Silvertip View Post
            The issue with SAE30 is that it is a conventional motor oil. Two stroke oils are designed to "burn" more completely and are made specifically for two-stroke engines. There is also a difference between "two-stroke" oil and "TCW3" branded two stroke oil. TCW3 is for use in "water cooled" two strokes. Conventional two-stroke oil is designed for use in "air cooled" engines. So DO NOT use LawnBoy or other chain saw/weed whip oils in your water cooled outboard.
            In spite of what is on the BRP site, the ratio is 24:1
            Wayne

            Comment


            Working...
            X