• 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.
  • ALL iboats Forum Members and Guests:
    To show our appreciation for your participation in the Forums, we're offering an exclusive Forums-only discount good for an additional 5% off your iboats.com order for a limited time.
    To redeem, simply call our Customer Service Team at 800-914-1123 (Open M-F, 9am - 8pm Eastern Time) and mention the Forums 5% off discount. Offer excludes engines, trolling motors, and electronics.

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 threads or hijack existing threads. Old threads of a technical nature are like a library book, Please do not write in them.

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

3. Do not take over someone elseís thread (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 thread of your own.

4. If you have a question for the original poster (OP) and the thread 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 thread.

5. By starting your own thread, 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 thread. And those answers will be specific to your particular issue.

6. Please do not post to threads that have been inactive for more than 3 months unless you are the original poster. We have very active forums and any thread 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 thread.

7. Posting at the end of any thread is considered to be hijacking the original posters thread which in turn subjects the thread 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 thread asking you not to reply to old threads. The Red banner will read: Please note this thread has been inactive for 90 days. For the best results, please start a new thread.

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

WOT during compression test? and couple other questions

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


  • WOT during compression test? and couple other questions

    Hi,

    I read that I should wOT when doing compression test. I have a standard throttle contol handle where you push it forward to put it in foward and push it further to increase the throttle. I also know that I shouldn't crank an engine in gear, so if I WOT it during compression test, will it do any damage or will it be ok because it won't fire up? boat is a 83 16ft Invader with a 90 hp v4 evinrude.

    another question on electricals. One of the wires that connects between the main connector (sitting on the port side) and the terminal block(on starboard), its length is pinched tightly around the 2 banks of cylinder head( it's too short to route it below the heads). the wire currently is wrapped in insulation tape, I suspect the original vinyl tubing is already melted. what can i do about it? should I extend it by cutting the connector off of the terminal end and attach a section of wire to it, what gauge wire do I need? do i some kind of "marine" connector? I know I should rubber dip it. do I need to wrap it with those expensive heat-shrink tubing from west marine or just some vinyl tubing will do?

    thanks


  • #2
    Re: WOT during compression test? and couple other questions

    I read that I should wOT when doing compression test. I have a standard throttle contol handle where you push it forward to put it in foward and push it further to increase the throttle. I also know that I shouldn't crank an engine in gear, so if I WOT it during compression test, will it do any damage or will it be ok because it won't fire up? boat is a 83 16ft Invader with a 90 hp v4 evinrude.
    You do not have to. The engine should not turn over in gear. You can manually hold open the butterflies (carb) at the carburetors.

    You are really looking for the relationship of all four cylinders. THey should be with 5-10 psi of each other.

    another question on electricals. One of the wires that connects between the main connector (sitting on the port side) and the terminal block(on starboard), its length is pinched tightly around the 2 banks of cylinder head( it's too short to route it below the heads). the wire currently is wrapped in insulation tape, I suspect the original vinyl tubing is already melted. what can i do about it? should I extend it by cutting the connector off of the terminal end and attach a section of wire to it, what gauge wire do I need? do i some kind of "marine" connector? I know I should rubber dip it. do I need to wrap it with those expensive heat-shrink tubing from west marine or just some vinyl tubing will do?
    Just cut and splice the wire or replace it. It is probably 14 or 16 guage. You can buy heat shrink tubing many places.

    Comment



    • #3
      Re: WOT during compression test? and couple other questions

      On the compression test you need to remove all spark plugs and disconnect the coils. It can not start with out the plugs. The WOT is that the carbs are at WOT letting in the Max amount of AIR. That is all they mean. Don't WOT throttle it with three plugs in and the thing running on muffs or you will have parts to sell on Ebay.
      To get WOT all you need to do open the butterflies on the carbs manually.

      TPFB

      Comment



      • #4
        Re: WOT during compression test? and couple other questions

        You do NOT have to wot a two-stroke. That's four-stroke stuff. Two stroke cylinders are wide open at the bottom of the stroke and air pressure is normal atmospheric at cranking speeds. Opening the throttles does nothing.

        Comment



        • #5
          Re: WOT during compression test? and couple other questions

          I did the test w/o using wot. the readings were 125, 120(#1 and #3 on bank 1), 110, 110(#2 and #4 on bank 2). do you see problem? Strange, I'd expect bank #1 to be lower because it looks to be in worse shape(paint chipping, and a little discoloration, at least I think that's what it's. bank 2 is still very shiny and beautiful.)

          is there's an easier way to do the test? for each test, I had to climb into the boat, crank it, climb down, reset it, climb back in. CAn I just jump certain cable while standing next to the outboard(pls give details). fyi, to disable the ignition, I simply disconnected the kill switch.


          thanks.

          Comment



          • #6
            Re: WOT during compression test? and couple other questions

            Jump the starter solenoid. Large terminal that has the positive battery cable on it -- to the small terminal that has the wire from the ignitiion switch on it.

            Comment



            • #7
              Re: WOT during compression test? and couple other questions

              Decarb and new thermostats should even things up.

              Comment

              Working...
              X