How To Change Lower Unit Oil on new Mercury FourStroke 250

[@Rich-it1mc]

Thank You John, this will be my first oil change on this engine. I have always admired your attention to detail.

[@Maynardd]

Good video, I have a Merc 250 as well and it’s the first time I need to change the gear lube. It does aggravate me that the prop has to be removed when they could’ve given us access on the outside. But thanks to you I can very easily do this myself. Thank you for the video.

[@RedsFishin]

Nice job! Changed in under 12 minutes! I always level my motor when refilling, but I think you were pretty darn close.

[@riccochet704]

Agreed. Lower unit should be level when filling.

[@Jeff_in_Florida]

Thanks. You gave me the confidence to do mine now ..

[@ronniehenson4122]

55 lbs of torque and you should grease the prop shaft. Good video Thanks!

[@davidhudson2087]

Thanks John made my joe easier🎣

[@nik-lc3ob]

No grease on the prop shaft before assembly?

[@bassfisher685]

Few things he left out. When the lube starts coming out the top vent plug, let sit for 5 min. You have to allow all the trapped air to rise to the top, once it sets pump again till it over flows.... TORQUE THE VENT PLUGS!!!!! 8.66 ft lb... there is a reason these have bolt heads (10mm)

[@richardbumpuscjf347]

Thank you! It was a breeze!!!

[@mikethetoolman8776]

read that you need to tilt eng up and down a few times and refill to ensure proper levels?

[@JohnCrews]

Won’t hurt but not necessary

[@modelrailscenes]

Nice job

[@flipper2473]

Hey John, is that gear lube pump attachment the same size as the old size thread attachment that fit would fit into the old 2 stroke motors , or do I have to buy a different pump for the newer motors? Also, have you ever heard a tic, tic, tic sound after releasing trim button? I hear tic, tic , tic after lowering motor to about 85% down, then releasing button. Thanks

[@JohnCrews]

I think it’s the same. 👍🏼

[@hydro_rebel7741]

The 200 and 250 must be different, I have the 200 and it's only got a 1 inch prop shaft. But great video!

[@jasonclark625]

Great video man. Was wondering if you knew if the 150 pro xs is the same set up as changing the gear lube as yours?

[@jamesbehrendt2767]

I can’t believe you don’t have a locking prop nut on there!

[@mburke1211]

Great demonstration John!

[@davidgray9292]

I don't have to tale my pro off of my 2017 60 horse mercury, it has a drain plug on the side like the old ones, but it has a full level plug and a vent plug,not so sure about that.

[@brianpeterson8026]

I live in Wisconsin would you do any thing extra for winter storage it going to live in my garage

[@bunkman64]

07:41 That's what she said.

[@REJ509]

Lol

[@Combatkid174]

Did you lower the engine to be level ? It doesn't appear to be. Otherwise good information..

[@brianbbb7931]

Camera man has the COVID. 😂

[@JohnCrews]

😂

[@dennisbingham6009]

Always lubricant prop shaft before reassemble.....

[@jasonmausteller2488]

Shouldn’t there be grease on the splines?

[@JohnCrews]

Jason Mausteller For sure. I go by feel. I put plenty in upon first time I put prop on. There was still enough on them so I didn’t mention it. Good call.

[@anthonyhansen5809]

Do you get the lower unit oil screw "snug" or do you really need to make sure to get it extra tight? I just don't want to over tighten.

[@JohnCrews]

You can’t over tighten it by hand. 👍🏼

[@bassfisher685]

@@JohnCrews yes sir you can! You break that gasket, and water will get in! Torque spec for that Torque master is 8.66Ft Lb.

[@rodneyhanbaum697]

Outstanding

[@jerryvalentour164]

The fitting for filling is different from the other one used on other 2 strokes mercury outboard older version

[@williambigsby4031]

Were did you get the prop cover?

[@JohnCrews]

It’s called a Prop Alert. They have a website

[@adamnowlan9386]

Where’d you get your pump for that John ?

[@Moose2888]

Any marine dealer or walmart

[@tomcampagna748]

Mercury says the beveled washer goes in the middle not on the end when putting back on

[@DaleStagg]

Correct. It doesn’t do anything if on the outside. It is supposed to go in the middle and acts like a spring washer. He did it wrong here.

[@Factoryphoto]

So does that beveled washer go in the middle of the other two? And the beveled part facing in?@@DaleStagg

[@bakervinci163]

I had zero shavings , but my oil was creamy after a 10 hour change and 60 hours.

[@JohnCrews]

Condensation can make it look that way

[@josephlassiter1412]

Is there not a Carter pin on the prop nut?

[@Moose2888]

No

[@joepeschong6690]

The 90 weight oil is very smelly and does not wash off your hands easily. I use disposable gloves for this.

[@cmbtvet01]

Where did you get the pump?

[@Moose2888]

Any marine dealer or walmart

[@tomgtecmaslz3516]

Gostei da explicação

[@latricemitchell1423]

I I’m mom