Announcement

Collapse
No announcement yet.

How to Change Your Impeller (Mercury Engine)

Collapse
This is a sticky topic.
X
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    How to Change Your Impeller (Mercury Engine)

    The following article is how to change an impeller on a 2001 Tigé 2300 V with a MerCruiser 350 Mag engine. Other Tigé V-drive models may be similar. If you have a Direct Drive model you may pick up some useful tips, but the procedure for removing the pump will not apply.

    **** Disclaimer: The following instructions are provided as a guide only. By following the instructions in this article, you are doing so at your own risk. TigéOwners.com, Tigé and the author of this article will not be held responsible for any damage that may occur to you or your boat as a result of the steps below.

    What you will need:
    1. S.A.E. Socket set
    2. S.A.E. Combination Box/open-end wrenches
    3. Flat head screwdriver
    4. Impeller

    Resources/Suggestions
    • I like to use www.mercurypartsexpress.com to order MerCruiser parts. I don’t have a dealer nearby, so they are more convenient. Even if you don’t order from them, they have a great parts lookup with diagrams. All you need is your motor’s serial number.
    • Mercruiser Service Manual. Always a good thing to have. It’s large. I had to buy a 3 inch three ring binder for it.

    Step 1.
    The seawater pump is located on the port side of the motor at the rear of the boat. Here's what you'll see after you pull the port engine panel out. You can just see the pump behind the fuel filter (blue arrow).
    impeller1.jpg

    Step 2.
    Remove the belt by first backing off the locknut (blue arrow) and then turning the smaller bolt (red arrow) On my particular model V-drive engine this pulley is located on the port side above the pump. It may be in different locations on other models.
    impeller2.jpg

    Step 3.
    Remove the fuel filter from its bracket and pull it out of the way. Loosen the hose clamps (blue arrows). It’s a good idea to take note of which hose goes to which outlet. My outlets were marked – yours may not be if the housing has been replaced with an aftermarket item.
    impeller3.jpg

    Step 4.
    Remove the two bolts holding pump bracket to motor block. The pump is now free. Removing the pump from the engine compartment may take some maneuvering of the pump and the fuel filter. As you pull the pump towards the back of the boat the hoses should pull off the back of the pump. If the hoses seem stuck, it may help to gently pry the hoses a little to get them loose.
    impeller4.jpg

    Step 5.
    Alternate View of Components
    Here’s an alternate view looking straight down from above just in case you having trouble locating something.
    • Blue Arrow - pump bracket bolts.
    • Yellow Arrow - Pump.
    • Green Arrow – Hose clamp
    • Red Arrows - Nuts to remove fuel filter and bracket
    impeller5.jpg

    Step 6.
    Once you have the pump out and on your bench, make a note of the bolt and nut locations for reassembly. Three of the bolts just hold the impeller housing to the shaft/pulley assembly. The other two (red arrows) hold the housing and also secure the bracket on the pulley side with nuts. If you ignore or forget this step, it can be confusing when trying to reinstall the pump as the bracket will go back on in several different positions.
    impeller6.jpg

    Step 7.
    Here’s what you can expect to find when the pump housing is removed. Once you clean out the impeller pieces, check the impeller housing carefully - it is usually plastic. If there is any damage such as scoring, it should be replaced. There are also two o-rings. The first you can see on the impeller housing (blue arrow). The second is a small o-ring on the shaft, beneath the thin steel plate. I didn’t remove the plate for this picture, but the yellow arrow shows the approximate location.

    An important consideration is the location of all the old pieces. Sometimes chunks of the impeller can get caught in your cooling system and cause a blockage. First time out after replacing the impeller, always keep an eye on the temperature gauge to make sure there aren’t any problems.

    When inserting the new impeller, it’s easier if you use a little lubricant. I used some marine grease, but silicone spray or even binding lube will work.. It’s a tight fit and you will have to bend the impeller vanes. Just try to bend them to follow the direction of rotation. On my pump the rotation was marked on the housing. If you happen to get the vanes backwards they are flexible and should flip over when the motor is cranked.

    Reverse these steps to reinstall the pump. Double check all your nuts, bolts, and clamps.
    impeller7.jpg

    Last edited by Matt Garcia; 05-17-2020, 01:55 PM.

    #2
    Hurray.......... its done. Good job Matt!!

    Comment


      #3
      Great Job!! That is an excellent article. Also, for those people replacing Impellers....you may want to check this out.
      sales site - http://www.marisolmarine.com/parts/globeimpellors.html
      mfg site - http://www.globerubberworks.com/

      They are impellers that guarantee to run dry for 15min. I've used one for 3 years, and when I decided to replace it (for safe measure) it looked brand new when I pulled it out.

      Comment


        #4
        excellent work
        "I want to know God's thoughts, the rest are just details"

        Comment


          #5
          Nice article.

          Tip
          -Tip

          Comment


            #6
            Update -

            Another Tige Owner used this article for his 2003 20i and only had a one or two minor differences.

            It was also his first impeller change and the article guided him with no problems.

            Comment


              #7
              Matt,

              The pictures aren't showing up in the article anymore...is there a way to include them again?

              Thanks-
              Tom
              We have seen the enemy, and the enemy is us.

              Comment


                #8
                Thanks Matt,
                Does this info also hold true for a 2005 24v ?

                Comment


                  #9
                  Originally posted by Hoots View Post
                  Matt,

                  The pictures aren't showing up in the article anymore...is there a way to include them again?

                  Thanks-
                  Tom
                  Tom, are you sure? I can see the pictures fine?? Is anyone else having a problem viewing the pictures?

                  gman, you have a Marine Power dont you? I am not really sure if this is the same,maybe some one can comment on it. I havent changed the impeller on my MP so I am not sure.

                  Comment


                    #10
                    I can see them fine too Matt.
                    If you ain't falling.. you ain't trying hard enough..

                    Comment


                      #11
                      Oh and AWESOME write-up btw!!!!
                      If you ain't falling.. you ain't trying hard enough..

                      Comment


                        #12
                        I used the article. I was that other owner matt refered to. It is a good basis to go by. After you change it once, you will be able to do it w/o the artilce w/no problem.....it is a really good reference point.

                        Comment


                          #13
                          wow, I guess it's just me...I've got nothing. Maybe it's my browser settings; thanks for the reply.
                          We have seen the enemy, and the enemy is us.

                          Comment


                            #14
                            I had my dealer point out to me the impeller location on my MP engine and it was entirely different. I thought it was high on the front of the engine (the back of the boat). If I could edit the tech article, I would say that the only thing to do is state type of engine and year.
                            Be excellent to one another.

                            Comment


                              #15
                              Originally posted by talltigeguy View Post
                              I had my dealer point out to me the impeller location on my MP engine and it was entirely different. I thought it was high on the front of the engine (the back of the boat). If I could edit the tech article, I would say that the only thing to do is state type of engine and year.
                              Changing Your Impeller
                              The following article is how to change an impeller on a 2001 Tigé 2300 V with a MerCruiser 350 Mag engine. Other Tigé V-drive models may be similar. If you have a Direct Drive model you may pick up some useful tips, but the procedure for removing the pump will not apply.
                              Common Sense is not so Common
                              Looking for fat chicks for long walks, romance, cheap buffets, and BALLAST.

                              Comment

                              Working...
                              X