• 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 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

Force 150 - Timing

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


  • Force 150 - Timing

    Just rebuilt '90 Force 150 ,new pistons, cylinders rebored etc... Everything back together fine no Issues. Trying to settiming , ran into issues.Manual (Force 150 hp Service Manual- Brunswick marine - OB4643) say to set cranking timing to 30degs, WOT at 32degs.Not even close, cranking is retarded almost to TDC mark. This allows good rpms 750 at idle, 32 degs at WOT.Engine runs fine at these settings.Timing adjustment seems fairly centered (not maxed out in or out).Am I missing something? Or is the manual that far off.ThanksAm I missing something or is


  • #2
    Re: Force 150 - Timing

    ON MY MANUAL WHICH IS SELOC IT STATES MAXIUM IGNITION TIMING IS 32BTDC FOR STATIC AND 30 BTDC FOR DYNAMIC MAX; RMP 5000-5500 IDLE RPM 700-800 IN NETURAL

    Comment



    • #3
      Re: Force 150 - Timing

      What the cylmer manual is trying to say is set the timing 2 degrees slow at cranking rpms( with advance fully advanced) because when you start and run the engine 5000 rpms the timing will move app 2 degrees because of voltage increase.
      Help somebody every day, if you can.

      Comment



      • #4
        Re: Force 150 - Timing

        From Idle to WOT the timing moves approx. 20-30 deg (from ~5 deg BTDC to about 32 deg BTDC)I am not sure of the term, is this refered to as advancing?If My timing advances ( I am assuming the term is advances) 30 deg from idle to WOT.How can I set the timing to 30BTDC at cranking???Does cranking mean at idle??

        Comment



        • #5
          Re: Force 150 - Timing

          Cranking means turning the engine with starter. When you do the timing at cranking rpms, remove spark plugs wires (or engine will start) connect wires to spark tester, connect timing light to number 1 spark plug wire, set throttle to full throttle, turn engine with starter, using remote starter switch.. This is only to get the timing in the ball park. Final timing check has to be at recommend rpm. If you have it at 32 at 5000 rpms and this is correct specs, it is not necessary to do the cranking timing.
          Help somebody every day, if you can.

          Comment



          • #6
            Re: Force 150 - Timing

            That makes sense.I wasn't setting the throttle to WOT at cranking speed, so it should be less advanced.Great, sounds like I'm Done!

            Comment

            Working...
            X