How to Replace an Outboard Motor Impeller on a Mercury Four Stroke

Learn how to replace the impeller or water pump on your #Mercury four stroke outboard motor. Capt. Orlando of Nomad Fishing Charters takes you the process step by step.

[@raymurray-xo7of]

Exellent video step by step

[@CaptOrlandoMuniz]

Thank You!

[@robb5834]

Captain thank you for step by step it helps lot

[@CaptOrlandoMuniz]

👍👍👍

[@robertocaparros6441]

Gracias por sus esplicaciones

[@CaptOrlandoMuniz]

👋👋

[@jeepjamboreejk]

AM I THE ONLY ONE THAT NOTICED HE PUT THE IMPELLER ON BACKWARDS FROM THE WAY IT WAS REMOVED!???

[@CaptOrlandoMuniz]

There’s a chance it looks backwards on video. If it is on backwards, works great. 🤣

[@Maynardd]

From what I can tell, he moved the camera from one side to the other. It’s on the same way.

[@Scottrz28]

Great video thank you so much for sharing.
Do you need to torque anything or just hand-tighten as normal?

[@CaptOrlandoMuniz]

Thanks! I don’t usually torque anything. I just hand tighten.

[@rdaystrom4540]

Yeah. It was installed backwards.

[@CaptOrlandoMuniz]

Lol… pretty sure the camera inverted the image so it looks backwards. 😜

[@MikeHardiman-ym5bo]

At the 1:57 mark you are taking out the bolt that holds the annode plate on. Can you tell me what size socket to use? That bolt is way down a chamber and it would be very helpful to know what socket I'm trying to attach to it. Thank you!!!!

[@CaptOrlandoMuniz]

I believe it is 3/8 or 5/16. I normally just check the size with the new one before removing the old. They should be the same size.
Good Luck, Capt. O

[@honeyssack]

Do you put in neutral or forward before removing the lower unit?

[@CaptOrlandoMuniz]

Shouldn’t matter as long as both the shifter and lower unit are in the same position. Sometimes the rod on the lower unit moves out of place and it becomes a bit of a PIA. If that happens and they don’t align, you’ll have to check their positions again.
Good Luck, Capt. O

[@robhayes5320]

Nice vid . What about changing the gear oil .shouldn’t that be done also?

[@CaptOrlandoMuniz]

Yes. Every 100 hours.
ua-cam.com/video/R-fW4HX2esg/v-deo.html

[@MichiganPowersports]

Im not sure if the lower fluid is released when dropping the lower unit.

[@christophercarrothers995]

Great video...torque specs?

[@CaptOrlandoMuniz]

Those can vary depending on make, model, and manufacture. May want to check your owners manual.
Thanks, Capt. O

[@dennisberry9875]

Great video! Is the 2020 90hp mercury command thrust impeller changed the same way? Thanks in advance Lord Jesus Bless You 1:55

[@CaptOrlandoMuniz]

Not sure but probably very similar

[@robrandolph9463]

What did u put on at 8:20 .. didn’t mention that

[@CaptOrlandoMuniz]

I believe that was a rubber seal that fits over the shaft and rests on the housing. Also applied some grease to the bolts to keep them from seizing up.
Good Luck, Capt. O

[@robrandolph9463]

@@CaptOrlandoMuniz thank you, switched it out today .. also replaced a broken speedometer while in there which the piece broke in side and had to reverse tap it out .. also had prop engaged in Forward so when I put it all together and fired it up the prop only spun ion one direction . so pulled it down and lifted the gear spindle and twisted it, that put it in Neutral pushed it back up and that was it .. thanks again.

[@CaptOrlandoMuniz]

@@robrandolph9463That’s Awesome! 👏👏

[@davidconover2905]

Do I need to take off my propeller to replace my impeller on my 40 mercury 4 stroke?

[@CaptOrlandoMuniz]

Not necessarily. Just makes the lower unit lighter and easier to work with.
Tight Lines, Capt. O

[@davidconover2905]

Thank you