• 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 else’s 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 it’s posted at the end of someone else’s 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

OMC 4 cyl, 3.0 Liter prop options

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


  • OMC 4 cyl, 3.0 Liter prop options

    I just bought a 1988 19' bayliner open bow with a OMC 4 cyl, 3.0 Liter, Cobra outdrive.Being new to boating I recently took a chunk out of my alum. 13 3/4 x 15 prop and am looking at replacing it. If I remember right the boat used to get about 35mph at 4,400 RPM (don't quote me on the RPM, just know when it was at WOT I would be slighty over the 35mph mark).Normally the boat is pretty loaded 4 adults 3 small kids and we do a lot of tubing and water skiing ...QUESTION 1: Should I consider getting something different than the current 13 3/4 x 15 prop. QUESTION 2: I was reading up on the Hustler props would anyone know what prop I should get for my boat to match the 13 3/4 x 15 ... thoughts.QUESTION 3: Anyone have any opinions on Piranha props. http:www.piranha.com


  • #2
    Re: OMC 4 cyl, 3.0 Liter prop options

    First, Welcome aboard!Before any recommendations are in order, what is the Max wot rpm range suggested from the manufacturer for your engine.Remember this, tachometer is required(to know what the prop is doing for us) and speedometer is optional and usually gets us led in the wrong direction for initial set-up.

    Comment



    • #3
      Re: OMC 4 cyl, 3.0 Liter prop options

      run a 13\1/4 by 21 pitch ss prop and u will love it

      Comment



      • #4
        Re: OMC 4 cyl, 3.0 Liter prop options

        check out power tech props 1 800 567 7767 and ask for orlando and tell him bryan sent u u wont be sorry

        Comment



        • #5
          Re: OMC 4 cyl, 3.0 Liter prop options

          You are right in the sweet spot with your 15" pitch prop right now. Recommended rpm range is 4200 - 4600 rpm. I wouldn't change a thing. Your speed is right in there for your boat/engine combination.I have the same engine and drive and use a 14"dia. x 17" pitch on a smaller 16 ft bowrider. I sometimes use a 13 dia. x 19" pitch stainless, but it suffers a little on take off (hole shot). A 21" would really lug your engine and be out of your recommended rpm range. It would be terrible with the amount of people(weight) and too slow for skiing/tubing.

          Comment



          • #6
            Re: OMC 4 cyl, 3.0 Liter prop options

            u might want to think about a 4 blade prop with all the weight it is just a ? props are hard to dial in u got to have a tach

            Comment



            • #7
              Re: OMC 4 cyl, 3.0 Liter prop options

              Thanks all for your advice.- So far it looks like my options are as to give Orlando a call see what is recommended there- Get a stock prop since I would have to agree with cobra 3.0 - Then I'll buy a reserve prop and give the other pitch, blade #, etc. a try. Just got to find a place that will let me experiment a little Thanks all for you help, I'll reply back with what I find just in case other people have similar questions

              Comment

              Working...
              X