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Here’s the issue and why Yamaha tells you you should not run the motor through that flush hose. Most residential homes do not have the water pressure needed to safely run the motor while using this method. The water pump pulls water up through the housing and by using your method you’re pushing water into the housing and the impeller is pushing it back faster than it’s coming in therefore you will burn up the impeller.

I have a 90 hp SHO 2024,,, Boat will run great for a while and then it seems to run out of gas squeeze bulb looks collapsed

Merci beaucoup ❤❤❤❤❤

Very good video, you are a master at how you explain everything clearly. I am sure that many of you, like me, are grateful for all your explanations. From today on I will follow you because it was a very interesting and productive video. Thank you so much for the way you explain everything.

Merci beaucoup ❤❤❤❤❤❤❤❤

Great video thx!!

Merci beaucoup ❤❤❤❤❤❤❤

Great video and explanation. So the indicator flow (pee hole) discharges after flowing through the block? If so, this would mean that if your engine was overheating, the pee water would be hot too?

Please turn over the Garmin cover.

I can send the picture of the missing wire if you want !

Guessing mercury engineers forgot how stainless and aluminum doesn’t like each other, painful watching that drain plug back out I was waiting for those threads to cross🫡

Its wild how many folks dont know this. I tell all my customers

That is the best explanation/demonstration of this outboard function. It seems there are so many different theories floating around, you don't know which one to believe. This backs up what Yamaha recommends doing. Thanks.

Awesome video, I’m having the same problem. I cannot figure out how the water is getting into the gas tank. I have a 2015 Silverwave with a tritoon, the vent on the tank looks like the hose runs to the top of the tank in the transom. If the ass end of the boat gets weighted down I would assume water would come in the vent?

Ima go check it out….Thanks!

Saludos pete desde 🇵🇷

Buenas noches mi amigo

thanks for the video, however did not work for my 225 opti.

Great video. Love the manner in which you explain things. Very useful for those of us who are trying to learn. Excelente!

A teacher 👍🏻

Me alegro que das explicaciones en español tambien , muchas gracias

I like your explication, thank you

I love you man i reaally enjoyed watching Ps: i’ll watch all videos 😌

I love you man i reaally enjoyed watching Ps: i’ll watch all videos 😌

Says right in the manual not to. Do what you want though. Your motor, broken or running.

Thank you very much for your post, very detailed work and well done. Can I use the same flushing procedure on a 2007 Yamaha F250TXR?

Great video! I learned a lot! I see that the plastic cover on the outside below the motor is worn. So is mine. How do you remove that cover? I would like to fix mine with sanding and a new coat of paint.

What a smart man, what a teacher !

Thank you sir. Straight to the point 🤙

We just found you. Best videos we have seen. We have had this problem 2 times on a fairly new boat. Had fuel tank polished again he said water was coming in ptrap because of location. We are going to move ptrap the one we have is attwood do you reconmend a vent p trap we lost our confedence in attwood products and jeanneau dealer doesnt want to help even though it is a 795 jeanneau. Or is you know who to contact. Thank you for you help

Is it okay to install a new fuel filter without a blind connector if the primary filter in the boat is fastened and the engine filter does not have a blind connector? Thank you!

This is not unique to 2017-2018 150. The newer optimax models also had this same setup, and all 2015 and up mercury outboards from 115-400hp have a similar design. Usually this fuse fails if the batteries were hooked up backwards at some point.

I just did this to my 2014 150 hp Merc. Your video helped a ton! Thank you for putting it out. I ran the testing just as you instructed. No output on alternator. Had to wait a week for a new one to come in. The big dealer in town had one in stock but it was $200 more. Two comments: rotating the alternator into place was pretty difficult. I had to push with my feet against the alternator. When it did rotate, it stopped just a bit past the hole but was easy to line up. The torqueing of the bolts takes more uuumph than I imagined to get the 36 ft lb torque. Tested on completion 13+ bolts. Perfect.

You are the best on RUclips!!! Where you located at? I will love to have you as my boat mechanic

I love your videos🙏🏽 Thanks for all you do💪🏽🫡🛥️

Is this also for a 250 motor or just 300

Absolutely great video! I wish most mechanics were as passionate and thorough as you!! I would only use you if you were in my area!!

God blessing US-4 Marin . 🎉❤😊

I feel like you’re a teacher at heart. Great job.

Awesome!

Awesome Video! The only video I could find that was really helpful. I have a 2015 225 SHO. I think I can do this now. I appreciate everyone's comments. I'll be sure to use PB Blaster first on the bolts.

Hi My mercury optimax 135, even shows 100% oil, it`s beeping 3 times. I know I had to purge couse the oil was goin down to 60% and after I fix it, still beeping. Any solutions?

Great video. Very very helpful.

Really good video much appreciated

Great video, thank you buddy.

WOW!!! This is awesome....Extremely grateful for this video.....could have saved me $3000.00 Thank you!

Can't get a decent alternator on a mercury 150. Mine is a 2020 was pulling 4 amps with everything off, only giving me 10 volts at full throttle. It's fixed now but it was a bad alternator

So shop I work at has a merc 150 4stk In the shop that all 4 of us guys have been discussing. its way over charging up to 15v and toasting alternators. In a matter of a day. New batteries with a new alternator it shows 13.5-.7 BUT by end of few hrs run time its 15-16 volts and a ruined alternator. Any Ideas? merc tech line is not much help. Merc keeps sending alternators its under warranty.

How does an engine just go out of time the belt wasn't broken the teeth were all on it how could it just go out of time

Most of these engines are INTERFERENCE built which means if your cam sprocket comes out of time from the cranks sprocket, valve to piston damage can happen when they contact. NEVER turn the crankshaft clockwise with the belt off and the cam sprockets flopping around like that. You want to line up all the marks BEFORE you let the timing belt loose. If a cam sprocket pops out of position, gently move back to position. But NEVER turn the crank !!! The industry makes sprocket holder tools for such applications.